Siemens SIWAREX FTA Application guide

SIWAREX®FTA
Device Manual
Status 05/2017

ii SIWAREX FTA
Safety Guidelines
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
with a safety alert symbol, indicates that minor personal injury can result if proper precautions are not taken.
CAUTION
without a safety alert symbol, indicates that property damage can result if proper precautions are not taken.
NOTICE
indicates that an unintended result or situation can occur if the corresponding information is not taken into
account.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will
be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to
property damage.
Qualified Personnel
The device/system may only be set up and used in conjunction with this documentation. Commissioning and
operation of a device/system may only be performed by
qualified personnel
. Within the context of the safety notes
in this documentation qualified persons are defined as persons who are authorized to commission, ground and
label devices, systems and circuits in accordance with established safety practices and standards.
Prescribed Usage
Note the following:
WARNING
This device may only be used for the applications described in the catalog or the technical description and only
in connection with devices or components from other manufacturers which have been approved or
recommended by Siemens. Correct, reliable operation of the product requires proper transport, storage,
positioning and assembly as well as careful operation and maintenance.
Trademarks
All names identified by ® are registered trademarks of the Siemens AG. The remaining trademarks in this
publication may be trademarks whose use by third parties for their own purposes could violate the rights of the
owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software
described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the
information in this publication is reviewed regularly and any necessary corrections are included in subsequent
editions.
Siemens AG
Automation and Drives
Weighing Technology SIWAREX
PD PA PI LW
Östliche Rheinbrückenstr. 50
Copyright © Siemens AG 2014
Technical data subject to change

SIWAREX FTA
SIWAREX FTA iii
SIWAREX FTA
Weighing Electronics
for Automatic Scale
Device Manual
Contents
Preface
1
Scope of Delivery
2
Product Overview
3
Hardware Planning and Assembly
4
Weighing Functions
5
Warning and Safety Terms
6
Messages and Diagnostics
7
Programming in SIMATIC STEP 7
8
Project planning in SIMATIC PCS 7
9
Commissioning using a PC –
SIWATOOL FTA 10
Firmware-Update with SIWATOOL
FTA 11
Calibrating Applications
12
Accessories
13
Technical Data
14
Index
15
Abbreviations
16
Revision 05/2017

iv SIWAREX FTA
Contents
1 Preface.................................................................................................................................... 1-1
1.1 PURPOSE OF THIS MANUAL.................................................................................................1-1
1.2 FUNDAMENTAL KNOWLEDGE REQUIREMENTS....................................................................1-1
1.3 SCOPE OF THIS MANUAL .....................................................................................................1-1
1.4 FURTHER SUPPORT..............................................................................................................1-3
2 Scope of Delivery .................................................................................................................. 2-4
2.1 SCOPE OF DELIVERY ...........................................................................................................2-4
3 Product Overview.................................................................................................................. 3-6
3.1 GENERAL INFORMATION .....................................................................................................3-6
3.2 BENEFITS ............................................................................................................................3-6
3.3 RANGE OF APPLICATION .....................................................................................................3-7
3.4 STRUCTURE.........................................................................................................................3-7
3.5 FUNCTION ...........................................................................................................................3-8
3.6 SYSTEM INTEGRATION IN SIMATIC...................................................................................3-9
3.7 COMMISSIONING AND SERVICE WITH SIWATOOL FTA ..................................................3-10
3.8 FIRMWARE DOWNLOAD WITH SIWATOOL FTA .............................................................3-12
3.9 READING THE STORED WEIGHING LOGS WITH SIWATOOL FTA......................................3-12
3.10 QUICK INSTALLATION WITH SIWATOOL FTA WIZZARD................................................3-12
4 Hardware Planning and Assembly .................................................................................... 4-13
4.1 PLANNING THE HARDWARE IN SIMATIC .........................................................................4-14
4.2 STAND-ALONE OPERATION ................................................................................................4-14
4.3 EMC-COMPATIBLE STRUCTURE .......................................................................................4-15
4.3.1 Definition: EMC ...............................................................................................................4-15
4.3.2 Introduction......................................................................................................................4-15
4.3.3 Possible Effects of Interference ........................................................................................4-15
4.3.4 Coupling Mechanisms ......................................................................................................4-15
4.3.5 Five Basic Rules for Guaranteeing EMC .........................................................................4-16
4.4 ASSEMBLY ON THE PROFILE RAIL .....................................................................................4-17
4.5 CONNECTIONS AND CABLING............................................................................................4-17
4.5.1 Connection areas for SIWAREX FTA...............................................................................4-17
4.5.2 Shield connection .............................................................................................................4-19
4.5.3 Connecting the 24 V power supply...................................................................................4-20
4.5.4 Connection to front connector..........................................................................................4-21
4.5.5 Load cell connections.......................................................................................................4-21
4.5.6 Digital Inputs....................................................................................................................4-25
4.5.7 Counter Input ...................................................................................................................4-26
4.5.8 Digital Outputs.................................................................................................................4-27
4.5.9 Analog Output ..................................................................................................................4-29
4.5.10 RS 485 interface for a METTLER TOLEDO ....................................................................4-29
4.5.11 RS 485 interface for load cells made by Wipotec/Kaiserslautern ....................................4-31
4.5.12 RS 485 interface for load cells made by PESA, Pfäffikon/Switzerland ............................4-32
4.5.13 Connecting the Remote Display by the Siebert company .................................................4-35
4.5.14 PC Connection for SIWATOOL FTA................................................................................4-36
4.5.15 LED Indicators.................................................................................................................4-37
4.5.16 Using the Micro Memory Card ........................................................................................4-37
4.6 OPERATIONAL PREPARATION ............................................................................................4-38
4.7 USE IN AREAS WITH RISK OF EXPLOSION ...........................................................................4-39
5 Weighing Functions ............................................................................................................ 5-41
5.1 GENERAL INFORMATION ...................................................................................................5-41

SIWAREX FTA
SIWAREX FTA v
5.2 DR3 ADJUSTMENT PARAMETER (NAWI, AWI)................................................................5-42
5.2.1 DR3 - Adjustment digits 0, 1, 2, 3, 4, for the zero point and Adjustment weights 1, 2, 3, 4 5-
45
5.2.2 DR3 - Characteristic value range ....................................................................................5-48
5.2.3 DR3 – Filter sequence of the signal filter.........................................................................5-48
5.2.4DR3 - Type of low pass filters ..........................................................................................5-49
5.2.5 DR3 - Limit frequency ......................................................................................................5-49
5.2.6 DR3 - Type of average value filters..................................................................................5-49
5.2.7 DR3 - Scale Name ............................................................................................................5-50
5.2.8 DR3 - Number of weight ranges.......................................................................................5-50
5.2.9 DR3 - Scale type...............................................................................................................5-50
5.2.10 DR3 - Activate zero setting on start-up ............................................................................5-50
5.2.11 DR3 - Activated zero setting at start-up, if scale is tared.................................................5-50
5.2.12 DR3 - Automatic zero adjustment.....................................................................................5-52
5.2.13 DR3 - Tare selection (subtractive, additive).....................................................................5-52
5.2.14 DR3 - Minimum weight for weighing range 1..................................................................5-52
5.2.15 DR3 - Maximum weight for weighing range 1 .................................................................5-52
5.2.16 DR3 - Numeral Step for weighing range 1.......................................................................5-53
5.2.17 DR3 - Minimum weight for weighing range 2..................................................................5-53
5.2.18 DR3 - Maximum weight for weighing range 2 .................................................................5-53
5.2.19 DR3 - Numeral step for weighing range 2 .......................................................................5-53
5.2.20 DR3 - Minimum weight for weighing range 3..................................................................5-53
5.2.21 DR3 - Maximum weight for weighing range 3 .................................................................5-54
5.2.22 DR3 - Numeral step for weighing range 3 .......................................................................5-54
5.2.23 DR3 - Stand-still time 1 ....................................................................................................5-54
5.2.24 DR3 - Stand-still range 1..................................................................................................5-54
5.2.25 DR3 - Waiting time for stand-still 1 .................................................................................5-55
5.2.26 DR3 - Maximum negative weight for zero setting at start-up...........................................5-55
5.2.27 DR3 - Maximum positive weight for zero setting at start-up............................................5-56
5.2.28 DR3 - Maximum negative weight for zero setting ............................................................5-56
5.2.29 DR3 - Maximum positive weight for zero setting .............................................................5-56
5.2.30 DR3 - Tare max. load T- ..................................................................................................5-56
5.2.31 DR3 - Load cell type.........................................................................................................5-56
5.2.32 DR3 – Monitoring time for the digital load cells .............................................................5-58
5.2.33 DR3 - Regulations ............................................................................................................5-58
5.2.34 DR3 - Unit of measurement..............................................................................................5-58
5.2.35 DR3 - Stand-still range 2..................................................................................................5-58
5.2.36 DR3 - Stand-still time 2 ....................................................................................................5-59
5.2.37 DR3 - Maximum waiting time for stand-still 2 .................................................................5-59
5.2.38 DR 3 - Stand-still range 3.................................................................................................5-59
5.2.39 DR3 - Stand-still time 3 ....................................................................................................5-59
5.2.40 DR3 - Minimum waiting time for stand-still 3..................................................................5-59
5.2.41 DR3 - Smallest set weight ∑ min .......................................................................................5-60
5.2.42 DR3 - Totalising value dt .................................................................................................5-60
5.3 THEORETICAL ADJUSTMENT –ADJUSTMENT WITHOUT ADJUSTMENT WEIGHTS ..............5-60
5.4 DR 4BASIS PARAMETER (NAWI, AWI) ...........................................................................5-61
5.4.1 DR 4 - Scale operating mode (Scale type)........................................................................5-62
5.4.2 DR 4 - Type: weighing (additive) .....................................................................................5-62
5.4.3 DR 4 - Type: weighing (subtractive) ................................................................................5-62
5.4.4 DR 4 - Type: filling (additive) and emptying....................................................................5-63
5.4.5 DR 4 - Type: filling (additive) without emptying..............................................................5-64
5.4.6 DR 4 - Type: filling (subtractive) without emptying.........................................................5-65
5.4.7 DR 4 - Type: Check weight...............................................................................................5-66
5.4.8 DR 4 - Type: Discontinuous totalizing .............................................................................5-67
5.4.9 DR 4 – Type: filling (additive)/(Big-bag) .........................................................................5-67

vi SIWAREX FTA
5.4.10 DR 4 – Type: filling (subtractive)/(Big-bag) ....................................................................5-68
5.4.11 DR 4 – Type: filling (subtractive) and emptying ..............................................................5-68
5.5 WEIGHING STEPS –STANDARD WEIGHING PROCEDURE ....................................................5-68
5.5.1 Processing weighing step 0 - Wait ...................................................................................5-69
5.5.2 Description of Weighing step 1 – Taring/Zero setting .....................................................5-69
5.5.3 Description of Weighing step 2 – Coarse/Fine.................................................................5-69
5.5.4 Description of weighing step 3 - Post dosing ...................................................................5-69
5.5.5 Description of weighing step 4 - End/Intermediate check................................................5-69
5.5.6 Description of weighing step 5 - Empty............................................................................5-70
5.5.7 Description of weighing step 6 - End control AWI...........................................................5-70
5.5.8 Description of Weighing Step 7........................................................................................5-70
5.5.9 DR 4 - Monitoring time for Logging ................................................................................5-70
5.5.10 DR 4 - Device for log output ............................................................................................5-70
5.5.11 DR 4 - Basis weight for the limit value 1..........................................................................5-70
5.5.12 DR 4 - Basis weight for the limit value 2..........................................................................5-70
5.5.13 DR 4 - Basis weight for monitoring the empty range .......................................................5-71
5.5.14 DR 4 - Empty range..........................................................................................................5-71
5.5.15 DR 4 - Switch-on weight limit value 1..............................................................................5-71
5.5.16 DR 4 - Shut-off weight limit value 1 .................................................................................5-72
5.5.17 DR 4 - Switch-on weight limit value 2..............................................................................5-72
5.5.18 DR 4 - Shut-off weight limit value 2 .................................................................................5-72
5.5.19 DR 4 - Switch-on weight limit value 3..............................................................................5-72
5.5.20 DR 4 - Shut-off weight limit value 3 .................................................................................5-72
5.5.21 DR 4 - Minimum through-put limit value 1 ......................................................................5-72
5.5.22 DR 4 - Minimum through-put limit value 2 ......................................................................5-72
5.5.23 DR 4 - Filter depth of averaging filter for through-put calculation .................................5-72
5.6 DR 7INTERFACES (NAWI, AWI) .....................................................................................5-72
5.6.1 DR 7 - Source for Weight Simulation ...............................................................................5-78
5.6.2 DR 7 - Decade used for rounding the decimal places of the process values....................5-78
5.6.3 DR 7 - Force in Service Operation...................................................................................5-78
5.6.4 DR 7 - Process value 1 for fast output to the SIMATIC CPU ..........................................5-79
5.6.5 DR 7 - Process value 2 for fast output to the SIMATIC CPU ..........................................5-80
5.6.6 DR 7 - Definition of the process alarms 0, 1, 2, 3, 4, 5, 6, 7 ............................................5-80
5.6.7 DR 7 - S7-FB-Life bit Monitoring Time ...........................................................................5-80
5.6.8 DR 7 - Weight for zero point (0 or 4 mA).........................................................................5-81
5.6.9 DR 7 - Weight for end value (20 mA) ...............................................................................5-81
5.6.10 DR 7 - Replacement Value for the Analog Output with OD.............................................5-81
5.6.11 DR 7 - Source for the Analog Output ...............................................................................5-81
5.6.12 DR 7 - Current range for the Analog Output ...................................................................5-81
5.6.13 DR 7 - RS232 Printer baud rate .......................................................................................5-81
5.6.14 DR 7 - RS232- Printer transfer control ............................................................................5-82
5.6.15 DR 7 – Protocol selection for RS 485...............................................................................5-82
5.6.16 DR 7 - Decimal Place for Remote Display.......................................................................5-82
5.6.17 DR 7 – RS 485-Baudrate ..................................................................................................5-82
5.6.18 DR 7 - RS485-character frame.........................................................................................5-83
5.6.19 DR 7 - Definition of the Digital Outputs 1, 2, 3, 4, 5, 6, 7, 8............................................5-83
5.6.20 DR 7 - Level definitions for digital outputs 1 to 8 ............................................................5-83
5.6.21 DR 7 - Replacement value for DO 1 to DO 8 with Interference or Output Disable.........5-84
5.6.22 DR 7 - Replacement values for digital outputs with operational faults............................5-84
5.6.23 DR 7 - Definition of the Digital Inputs 1, 2, 3, 4, 5, 6, 7 ..................................................5-85
5.6.24 DR 7 - Level definitions for digital inputs 1 to 7 ..............................................................5-85
5.6.25 DR 7 - Measurement time Pulse input..............................................................................5-85
5.6.26 DR 7 - MMC Log Overflow, MMC Trace Overflow, Target storage for trace function ..5-85
5.6.27 DR 7 - Memory segment for trace function ......................................................................5-86
5.6.28 DR 7 - Memory segment for log .......................................................................................5-86

SIWAREX FTA
SIWAREX FTA vii
5.6.29 DR 7 - Trace function recording cycle.............................................................................5-86
5.7 DR 8DATE /TIME (NAWI, AWI).....................................................................................5-87
5.8 DR 9INFO ON MODULE (NAWI, AWI).............................................................................5-87
5.8.1 DR 9 - Info on Module......................................................................................................5-88
5.9 DR 15 TARE ENTRY (NAWI, AWI)...................................................................................5-89
5.9.1 DR 15 - Tare Entry...........................................................................................................5-89
5.10 DR 16 WEIGHT SIMULATION ENTRY (NAWI, AWI).........................................................5-89
5.10.1 DR 16 - Weight simulation entry ......................................................................................5-90
5.11 DR 17 ANALOG OUTPUT CONTROL (NAWI, AWI)...........................................................5-90
5.11.1 DR 17 - Ext. Definition for Analog Output.......................................................................5-90
5.12 DR 18 CONTROL DISPLAY (NAWI, AWI) ........................................................................5-90
5.12.1 External remote display definition ...................................................................................5-91
5.13 DR 20 SET WEIGHT (AWI) ...............................................................................................5-91
5.14 DR 21 LOAD SET VALUE (AWI) ........................................................................................5-91
5.15 DR 22 SCALE PARAMETER 1(AWI)..................................................................................5-92
5.15.1 DR 22 - Maximum Weighing Time ...................................................................................5-92
5.15.2 DR 22 - Trailing Weight...................................................................................................5-93
5.15.3 DR 22 - Fine Weight.........................................................................................................5-93
5.15.4 DR 22 - Shut-off correction value ....................................................................................5-93
5.15.5 DR 22 - Timer pre-dosing ................................................................................................5-93
5.15.6 DR 22 –Tolerance TO1, Tolerance TU1, Tolerance TO2, Tolerance TU2......................5-93
5.16 DR 23 SCALE PARAMETER 2(AWI) ..................................................................................5-95
5.16.1 DR 23 - Text Selection for automatic logging ................................................................5-100
5.16.2 DR 23 - Max. single set weight.......................................................................................5-100
5.16.3 DR 23 - Inhibition time - Coarse....................................................................................5-100
5.16.4 DR 23 - Fine Inhibition time ..........................................................................................5-100
5.16.5 DR 23 - Inhibition time Set-Act comparison ..................................................................5-100
5.16.6 DR 23 - Default value for analog output with course ....................................................5-101
5.16.7 DR 23 - Default value for analog output with fine .........................................................5-101
5.16.8 DR 23 - Filter type for dosing ........................................................................................5-101
5.16.9 DR 23 - Depth of the mean value filter for dosing .........................................................5-101
5.16.10 DR 23 - Limit Frequency Filter for dosing.....................................................................5-101
5.16.11 DR 23 - Tare-/Zero setting mode....................................................................................5-101
5.16.12 DR 23 - Tare / Zero setting cycle ...................................................................................5-102
5.16.13 DR 23 - Tare minimum weight .......................................................................................5-102
5.16.14 DR 23 - Tare max. weight ..............................................................................................5-102
5.16.15 DR 23 - Time period for zero setting..............................................................................5-102
5.16.16 DR 23 - Step control through digital input 1, 2, 3, 4, 5, 6, 7 ..........................................5-103
5.16.17 DR 23 - Monitor time step control..................................................................................5-103
5.16.18 DR 23 - Definition check stop points..............................................................................5-103
5.16.19 DR 23 - Automatic post dosing.......................................................................................5-103
5.16.20 DR 23 - Post dosing type................................................................................................5-103
5.16.21 DR 23 - Stop on TO1 ......................................................................................................5-104
5.16.22 DR 23 - Stop on TO2 ......................................................................................................5-104
5.16.23 DR 23 - Stop with TU1 ...................................................................................................5-104
5.16.24 DR 23 - Stop with TU2 ...................................................................................................5-104
5.16.25 DR 23 – Continue upon stop because of TOL error.......................................................5-104
5.16.26 DR 23 - Control pauses..................................................................................................5-104
5.16.27 DR 23 - Pulse duration in pulse dosing..........................................................................5-105
5.16.28 DR 23 - Controller behaviour with dosage fault............................................................5-105
5.16.29 DR 23 - Selection for type of controller .........................................................................5-106
5.16.30 DR 23 - Control factor Proportional controller.............................................................5-106
5.16.31 DR 23 - Maximum one-time correction with the proportional controller ......................5-106
5.16.32 DR 23 - Controller Optimum Plus..................................................................................5-107
5.16.33 DR 23 - Controller Optimum Minus...............................................................................5-107

viii SIWAREX FTA
5.16.34 DR 23 - Set value for fine time .......................................................................................5-107
5.16.35 DR 23 - Control factor fine time controller....................................................................5-108
5.16.36 DR 23 - Overlapping time ..............................................................................................5-109
5.16.37 DR 23 - Emptying time ...................................................................................................5-109
5.16.38 DR 23 - Maximum empty time ........................................................................................5-109
5.16.39 DR 23 - Filling with coarse ............................................................................................5-109
5.17 DR 26 INTERNAL PROCESS VALUE 1(NAWI) .................................................................5-109
5.18 DR 27 INTERNAL PROCESS VALUE 2(AWI) ....................................................................5-110
5.19 DR 30 PROCESS VALUES 1(NAWI, AWI) ......................................................................5-111
5.19.1 DR 30 - NAWI-Status bits...............................................................................................5-111
5.19.2 DR 30 - AWI status flags ................................................................................................5-112
5.19.3 DR 30 - Gross process value ..........................................................................................5-113
5.19.4 DR 30 - Net process value ..............................................................................................5-113
5.19.5 DR 30 - Tare process value............................................................................................5-113
5.19.6 DR 30 - B/N weight ........................................................................................................5-113
5.19.7 DR 30 - B/N weight_x10.................................................................................................5-113
5.19.8 DR 30 - Tare...................................................................................................................5-113
5.19.9 DR 30 - Net weight .........................................................................................................5-113
5.19.10 DR 30 - Pulse counter value...........................................................................................5-113
5.19.11 DR 30 - Totalising memory 1 (calibratable) ..................................................................5-113
5.19.12 DR 30 - Totalising memory 2 .........................................................................................5-114
5.20 DR 31 PROCESS VALUES 2(NAWI, AWI) ......................................................................5-114
5.20.1 DR 31 - Through-put per second....................................................................................5-115
5.20.2 DR 31 - Current trailing weight .....................................................................................5-115
5.20.3 DR 31 - Current fine weight ...........................................................................................5-115
5.20.4 DR 31 - Unfiltered ADC value .......................................................................................5-115
5.20.5 DR 31 - Filtered ADC value after the signal filter .........................................................5-115
5.20.6 DR 31 - Filtered ADC value after the dosing filter ........................................................5-115
5.20.7 DR 31 - Current set value in load operation..................................................................5-115
5.21 DR 32 STATISTIC DATA (AWI) .......................................................................................5-115
5.21.1 DR 32 - Total number of weighing procedures ..............................................................5-116
5.21.2 DR 32 - Number of control weighs.................................................................................5-116
5.21.3 DR 32 – Classification of tolerance evaluation..............................................................5-117
5.21.4 DR 32 - Set weight..........................................................................................................5-117
5.21.5 DR 32 - Average net weight value.................................................................................5-117
5.21.6 DR 32 - Standard deviation of net weight from 10.........................................................5-117
5.21.7 DR 32 - Performance per hour.......................................................................................5-117
5.21.8 DR 32 - Weightings per hour..........................................................................................5-117
5.22 DR 34 ASCII WEIGHT VALUE (NAWI, AWI) .................................................................5-118
5.23 DR 35 CODED INFORMATION FOR CALIBRATABLE DISPLAY (NAWI, AWI) ....................5-118
5.24 DR39 VERSION RECOGNITION SECUREOCX...................................................................5-119
5.25 DR 40 TO 43 LOG TEXT 1TO 4(NAWI, AWI) ................................................................5-119
5.26 DR 44 LAST LOG (NAWI, AWI) .....................................................................................5-120
5.26.1 DR 44 - MMC-ID ...........................................................................................................5-121
5.26.2 DR 44 - Log ID...............................................................................................................5-121
5.26.3 DR 44 - Last log data .....................................................................................................5-121
5.27 DR 45 STRING (NAWI, AWI).........................................................................................5-121
5.28 THE DR 46 PARAMETER FOR READING FROM MMC LOGS IN SIMATIC .........................5-122
5.29 DR 47 REQUESTED LOG (NAWI, AWI)...........................................................................5-122
5.29.1 DR 47 - MMC-ID ...........................................................................................................5-123
5.29.2 DR 47 - Log ID...............................................................................................................5-123
5.29.3 DR 47 - Last log data .....................................................................................................5-123
5.30 DR 120/121 TRACE -DATA LOGGING .............................................................................5-123
5.31 DR 123 DATA CONTENT MMC .......................................................................................5-124
5.32 DR 122 LOG DATA MMC................................................................................................5-125

SIWAREX FTA
SIWAREX FTA ix
6 Commands ......................................................................................................................... 6-126
6.1 COMMAND GROUPS .........................................................................................................6-126
6.2 COMMAND LIST...............................................................................................................6-127
7 Messages and Diagnostics .............................................................................................. 7-137
7.1 MESSAGE TYPES..............................................................................................................7-137
7.2 MESSAGE PATHS .............................................................................................................7-137
7.3 RECOGNISING MESSAGES USING SIWATOOL FTA ........................................................7-138
7.4 RECOGNISING MESSAGES USING THE FB SIWA_FTA.....................................................7-138
7.5 RECOGNISING MESSAGES USING THE DIAGNOSTIC ALARMS IN THE SIMATIC-CPU.............7-138
7.6 MESSAGE LISTS DATA AND COMMAND ERRORS ..............................................................7-139
7.7 MESSAGE LIST TECHNOLOGY MESSAGES ........................................................................7-151
7.8 MESSAGE LIST OF OPERATING MESSAGES........................................................................7-156
8 Programming in SIMATIC STEP 7 ................................................................................... 8-159
8.1 GENERAL INFORMATION .................................................................................................8-159
8.2 SIWAREX FTA IN THE HW CONFIGURATION ...............................................................8-159
8.3 SIWAREX FTA IN CYCLIC STEP 7-PROGRAM .............................................................8-160
8.4 CALL PARAMETERS FOR FB SIWA_FTA ........................................................................8-161
8.4.1 ADDR:= 256, Input, INT................................................................................................8-161
8.4.2 DB_SCALE:= 12, Input, INT .........................................................................................8-161
8.4.3 DB_VECTOR:= 11, Input, INT ......................................................................................8-162
8.4.4 CMD_IN:= “DB_SCALE”.i_CMD_INPUT, Input, INT................................................8-162
8.4.5 SIM_VAL:= “DB_SCALE”.r_SIM_VALUE, Input, REAL ............................................8-162
8.4.6 ANA_OUT:= “DB_SCALE”.r_ANALOG_OUT_VALUE, Input, REAL........................8-162
8.4.7 DO_FORCE:= “DB_SCALE”.b_DIG_OUTPUT_FORCE, Input, BYTE .....................8-162
8.4.8 TRANSITION:= “DB_SCALE”.b_TRANSITIONS, Input, BYTE...................................8-162
8.4.9 CMD_INPR:= “DB_SCALE”.bo_CMD_IN_PROGRESS, Output, BOOL ...................8-162
8.4.10 CMD_INPR:= “DB_SCALE”.bo_CMD_FOK, Output, BOOL.....................................8-162
8.4.11 CMD_ERR:= “DB_SCALE”.bo_CMD_ERR, Output, BOOL.......................................8-163
8.4.12 CMD_ERR_C:= “DB_SCALE”.b_CMD_ERR_CODE, Output, BYTE.........................8-163
8.4.13 REF_COUNT:= “DB_SCALE”.b_INFO_REFRESH_COUNT, Output, BYTE ............8-163
8.4.14 PROC_VAL1:= “DB_SCALE”.r_PROCESS_VALUE1, Output, REAL........................8-163
8.4.15 PROC_VAL2:= “DB_SCALE”.w_PROCESS_VALUE2, Output, DWORD ..................8-163
8.4.16 SC_STATUS:= “DB_SCALE”.dw_SCALE_STATUS, Output, DWORD.......................8-163
8.4.17 ERR_MSG:= “DB_SCALE”.bo_ERR_MSG, Output, BOOL ........................................8-163
8.4.18 ERR_MSG_TYPE:= “DB_SCALE”.b_ERR_MSG_TYPE, Output, BYTE.....................8-164
8.4.19 ERR_MSG_C:= “DB_SCALE”.b_ERR_MSG_CODE, Output, BYTE..........................8-164
8.4.20 FB_ERR:= “DB_SCALE”.bo_FB_ERR, Output, BOOL...............................................8-164
8.4.21 FB_ERR_C:= “DB_SCALE”.b_FB_ERR_CODE.........................................................8-164
8.4.22 START_UP:= “DB_SCALE”.bo_START_UP_IN_PROGRESS ....................................8-165
8.4.23 CMD_EN:= “DB_SCALE”.bo_CMD_ENABLE ...........................................................8-165
8.4.24 ERR_MSG_Q:= “DB_SCALE”.bo_ERR_MSG_QUIT .................................................8-165
8.5 ALLOCATION IN THE SCALE DB......................................................................................8-165
8.6 CALIBRATABLE WEIGHT DISPLAY FOR WINCC FLEXIBLE................................................8-165
8.6.1 Functionality of the calibratable weight display............................................................8-167
8.6.2 Installation and Project Planning for the Calibratable Weight Display........................8-168
8.7 CALIBRATABLE WEIGHT DISPLAY WITH TIA-PORTAL .....................................................8-170
9 Project planning in SIMATIC PCS 7................................................................................. 9-172
10 Commissioning using a PC – SIWATOOL FTA ..........................................................10-173
10.1 GENERAL ......................................................................................................................10-173
10.2 WINDOWS AND FUNCTIONS OF THE SIWATOOL FTA .................................................10-173

xSIWAREX FTA
10.3 OFFLINE PROJECT PLANNING ........................................................................................10-173
10.4 ONLINE OPERATION ......................................................................................................10-173
10.5 RECORDER ....................................................................................................................10-175
10.6 ASSISTANCE ..................................................................................................................10-175
10.7 COMMISSIONING -WIZARD ...........................................................................................10-175
11 Firmware-Update with SIWATOOL FTA ...................................................................... 11-176
11.1 ADVANTAGES OF THE FIRMWARE-UPDATE ...................................................................11-176
12 Calibrating Applications ............................................................................................... 12-178
12.1 GENERAL NOTE ............................................................................................................12-178
12.2 CALIBRATABLE MAIN WEIGHT DISPLAY........................................................................12-179
12.3 READING THE CALIBRATABLE LOGS WITH SIWATOOL FTA .......................................12-179
13 Accessories ................................................................................................................... 13-180
14 Technical Data ............................................................................................................... 14-183
14.1 24 VPOWER SUPPLY......................................................................................................14-183
14.2 POWER SUPPLY FROM S7 BACK-PLANE BUS...................................................................14-183
14.3 LOAD CELL CONNECTION ..............................................................................................14-183
14.4 ANALOG OUTPUT ..........................................................................................................14-184
14.5 DIGITAL INPUTS (DI), DIGITAL OUTPUTS (DO) .............................................................14-184
14.6 COUNTER INPUT CI .......................................................................................................14-185
14.7 RS 232C INTERFACE .....................................................................................................14-185
14.8 RS 485 INTERFACE ........................................................................................................14-185
14.9 DIMENSIONS AND WEIGHT ............................................................................................14-186
14.10 MECHANICAL REQUIREMENTS AND DATA .....................................................................14-186
14.11 ELECTRICAL,EMC AND CLIMATIC REQUIREMENTS ......................................................14-187
14.11.1 Electrical protection and safety requirements..............................................................14-187
14.11.2 Electromagnetic Compatibility.....................................................................................14-187
14.12 ENVIRONMENTAL CONDITIONS......................................................................................14-189
14.13 LICENSES ......................................................................................................................14-190
14.14 SCALE LICENSES ...........................................................................................................14-190
15 Index ............................................................................................................................... 15-192
16 Abbreviations ................................................................................................................ 16-195
Images
IMAGE 3-1 AREAS OF APPLICATION SIWAREX FTA IN THE PRODUCTION CHAIN ................................3-9
IMAGE 3-2 CONFIGURATION SIMATIC S7/PCS7 WITH SIWAREX FTA...........................................3-10
IMAGE 3-3 SIWATOOL FTA OVERVIEW ..........................................................................................3-11
IMAGE 3-4 WEIGHING PROCEDURE PROGRESS DISPLAYED FROM THE TRACING IN SIWAREX FTA...3-12
IMAGE 4-1 SIWAREX FTA FRONT VIEW ..........................................................................................4-18
IMAGE 4-2 SIWAREX FTA PIN ASSIGNMENTS.................................................................................4-19
IMAGE 4-3 SHIELD CLAMP ASSEMBLY.................................................................................................4-20
IMAGE 4-4 SHIELDING IN THE SCREW JOINT........................................................................................4-22
IMAGE 4-5 PAIRS OF CONDUCTORS IN THE SHIELDED CABLE ..............................................................4-23
IMAGE 4-6 EXAMPLE –MOUNTING OF SHIELD CLAMPS ON MODULE ..................................................4-23
IMAGE 4-7 LOAD CELL CONNECTION IN 4-WIRE SYSTEM.....................................................................4-24
IMAGE 4-8 LOAD CELL CONNECTION IN 6-WIRE SYSTEM.....................................................................4-24
IMAGE 4-9 DIGITAL INPUTS ................................................................................................................4-26
IMAGE 4-10 COUNTER INPUT ...............................................................................................................4-27
IMAGE 4-11 DIGITAL OUTPUTS ............................................................................................................4-28

SIWAREX FTA
SIWAREX FTA xi
IMAGE 4-12 ANALOG OUTPUT..............................................................................................................4-29
IMAGE 4-13 CONNECTION OF LOAD CELL METTLER TOLEDO TYPE WM, WMH TO RS 485...........4-31
IMAGE 4-14 WIPOTEC LOAD CELL CONNECTION ..................................................................................4-32
IMAGE 4-15 PESA LOAD CELL CONNECTION .......................................................................................4-34
IMAGE 4-16 S102 DISPLAY CONNECTION ............................................................................................4-35
IMAGE 4-17 PC CONNECTION ..............................................................................................................4-36
IMAGE 5-1 ADJUSTMENT DIGITS AND WEIGHT VALUE.........................................................................5-46
IMAGE 5-2 LINEARISATION OF THE SCALE'S CHARACTERISTIC CURVE...............................................5-48
IMAGE 5-3 DIGITAL LOW PASS FILTER STEP RESPONSE .......................................................................5-49
IMAGE 5-4 STAND-STILL MONITORING ...............................................................................................5-55
IMAGE 5-5 WEIGHING STEPS IN AUTOMATIC FILLING OPERATION AWI ..............................................5-63
IMAGE 5-6 WEIGHING STEPS FOR CATCH WEIGHING WITH FILLING AWI ............................................5-64
IMAGE 5-7 WEIGHING STEPS DURING AUTOMATIC CATCHW./GRAVIM.EMPTYING MODE ...................5-65
IMAGE 5-8 WEIGHING STEPS FOR A WEIGHT RECORDING (CHECK)AWI .............................................5-66
IMAGE 5-9 WEIGHING STEPS FOR AWI TOTALISING ...........................................................................5-67
IMAGE 5-10 DEFINING LIMIT VALUE PARAMETERS ..............................................................................5-71
IMAGE 5-11 TOLERANCE EVALUATION PROGRESS BY TIME WITH TU1 STATUS....................................5-94
IMAGE 5-12 AUTOMATIC POST DOSING WITH TOLERANCE TU1 .........................................................5-105
IMAGE 8-1 FB SIWA_FTA CALL PARAMETERS................................................................................8-161
IMAGE 8-2 CALIBRATABLE DISPLAY IN TP/OP .................................................................................8-168
IMAGE 8-3 FUNCTION “SECUREOCX” IN WINCC FLEXIBLE ............................................................8-170
IMAGE 10-1 SIWATOOL FTA WINDOW DISTRIBUTION .................................................................10-174
IMAGE 11-1 DOWNLOADING FIRMWARE WITH SIWATOOL FTA...................................................11-177
IMAGE 12-1 READ THE CALIBRATABLE MEMORY WITH SIWATOOL FTA......................................12-179
Tables
TABLE 1-1 VALIDITY OF THIS MANUAL ...............................................................................................1-1
TABLE 1-2 CHAPTER OVERVIEW ..........................................................................................................1-2
TABLE 4-1 REQUIREMENTS FOR N SIWAREX FTA ...........................................................................4-14
TABLE 4-2 POWER SUPPLY CONNECTION ............................................................................................4-21
TABLE 4-3 LOAD CELL CONNECTION ..................................................................................................4-21
TABLE 4-4 DIGITAL INPUT CONNECTIONS ...........................................................................................4-25
TABLE 4-5 PULSE ENCODER CONNECTION ..........................................................................................4-26
TABLE 4-6 DIGITAL OUTPUT CONNECTIONS........................................................................................4-28
TABLE 4-7 ANALOG OUTPUT CONNECTIONS .......................................................................................4-29
TABLE 4-8 RS 485 CONNECTIONS ......................................................................................................4-30
TABLE 4-9 RS 485 CONNECTIONS ......................................................................................................4-32
TABLE 4-10 RS 485 CONNECTIONS......................................................................................................4-34
TABLE 4-11 ADDRESS OCCUPATION FOR THE S102 DISPLAY................................................................4-35
TABLE 4-12 PC CONNECTION ..............................................................................................................4-36
TABLE 4-13 INDICATORS (LED) ..........................................................................................................4-37
TABLE 5-1 DR3 ALLOCATION ............................................................................................................5-45
TABLE 5-2 DR4 ALLOCATION ............................................................................................................5-62
TABLE 5-3 DR 7ALLOCATION............................................................................................................5-78
TABLE 5-4 SELECTION LIST FOR PROCESS VALUES..............................................................................5-79
TABLE 5-5 TRACE ELEMENT DATA......................................................................................................5-87
TABLE 5-6 DR 8ALLOCATION............................................................................................................5-87
TABLE 5-7 DR 9ALLOCATION............................................................................................................5-88
TABLE 5-8 DR 15 ALLOCATION..........................................................................................................5-89
TABLE 5-9 DR 16 ALLOCATION..........................................................................................................5-89
TABLE 5-10 DR 17 ALLOCATION .........................................................................................................5-90
TABLE 5-11 DR 18 ALLOCATION .........................................................................................................5-91
TABLE 5-12 DR 20 ALLOCATION .........................................................................................................5-91

xii SIWAREX FTA
TABLE 5-13 DR 21 ALLOCATION .........................................................................................................5-91
TABLE 5-14 DR 20 ALLOCATION .........................................................................................................5-92
TABLE 5-15 TOLERANCE INFORMATION EVALUATION .........................................................................5-95
TABLE 5-16 DR 23 ALLOCATION .......................................................................................................5-100
TABLE 5-17 DR 26 ALLOCATION .......................................................................................................5-110
TABLE 5-18 DR 30 ALLOCATION .......................................................................................................5-111
TABLE 5-19 DR 30 -NAWI STATUS BITS...........................................................................................5-112
TABLE 5-20 DR 30 -AWI STATUS FLAGS ..........................................................................................5-113
TABLE 5-21 DR 31 ALLOCATION .......................................................................................................5-115
TABLE 5-22 DR 32 ALLOCATION .......................................................................................................5-116
TABLE 5-23 DR 34 ALLOCATION .......................................................................................................5-118
TABLE 5-24 DISPLAY EXAMPLE FOR WEIGHT DISPLAY.......................................................................5-118
TABLE 5-25 DR 35 ALLOCATION .......................................................................................................5-118
TABLE 5-26 DR 39 ALLOCATION .......................................................................................................5-119
TABLE 5-27 DR 40 ALLOCATION .......................................................................................................5-119
TABLE 5-28 PROCESS VALUES FOR LOG FIELD ALLOCATION ..............................................................5-120
TABLE 5-29 DR 44 ALLOCATION .......................................................................................................5-121
TABLE 5-30 DR 45 ALLOCATION .......................................................................................................5-121
TABLE 5-31 ALLOCATION OF DR 46 ..................................................................................................5-122
TABLE 5-32 ALLOCATION OF DR 47 ..................................................................................................5-123
TABLE 5-33 TRACE DATA RECORD.....................................................................................................5-123
TABLE 5-34 COMBINATION OF RECORDING ELEMENTS ......................................................................5-124
TABLE 5-35 OVERVIEW OF MMC DATA............................................................................................5-125
TABLE 5-36 DR 122 MMC LOG .........................................................................................................5-125
TABLE 6-1 SIWAREX FTA COMMAND LIST ....................................................................................6-135
TABLE 6-2 COMMAND GROUPS OF SIWAREX FTA .........................................................................6-136
TABLE 7-1 LIST OF DATA AND OPERATING ERRORS.........................................................................7-150
TABLE 7-2 LIST OF TECHNOLOGY MESSAGES...................................................................................7-155
TABLE 7-3 LIST OF OPERATING MESSAGES ......................................................................................7-158
TABLE 8-1 LIST OF HMI DEVICES FOR CALIBRATABLE DISPLAY .......................................................8-166
TABLE 14-1 DATA:24 VPOWER SUPPLY..........................................................................................14-183
TABLE 14-2 DATA:POWER SUPPLY FROM S7 BACK-PLANE BUS.......................................................14-183
TABLE 14-3 DATA:LOAD CELL CONNECTION ..................................................................................14-184
TABLE 14-4 DATA:ANALOG OUTPUT ..............................................................................................14-184
TABLE 14-5 DATA:DIGITAL INPUTS,DIGITAL OUTPUTS ..................................................................14-185
TABLE 14-6 DATA:COUNTER INPUT CI ...........................................................................................14-185
TABLE 14-7 DATA:RS 232C INTERFACE .........................................................................................14-185
TABLE 14-8 DATA:RS 485 INTERFACE ............................................................................................14-185
TABLE 14-9 DATA:DIMENSIONS AND WEIGHT ................................................................................14-186
TABLE 14-10 DATA:MECHANICAL REQUIREMENTS.......................................................................14-186
TABLE 14-11 DATA:ELECTRICAL PROTECTION AND SAFETY REQUIREMENTS................................14-187
TABLE 14-12 DATA:ELECTROMAGNETIC COMPATIBILITY ............................................................14-188
TABLE 14-13 DATA:CLIMATIC REQUIREMENTS.............................................................................14-189

1 Preface
1.1 Purpose of This Manual
All of the information required to construct and operation the SIWAREX FTA
is found in this manual.
1.2 Fundamental Knowledge Requirements
To understand this manual, a general knowledge of SIMATIC automation
technology is required. Weighing technology is also beneficial.
1.3 Scope of this Manual
This manual refers to the SIWAREX FTA module:
Type
Name
Order number
from product status
(Version)
SIWAREX FTA SIWAREX
Flexible
Technology
Automatic
Weighing
Instrument*
7MH4900-2AA01 HW
V1.0.0
FW
V.9.5.2
Table 1-1 Validity of This Manual
*The name corresponds with the naming conventions of the OIML - Organisation Internationale
de Metrologie Legale and means “Automatic Weighing Instrument”.
Note
This manual contains the description
of all modules that are valid at the time of
publication.
We reserve the right to deliver production information along with new modules or
modules with a newer product status that contains the current information on the
module.
For the legal
-for-trade display SecureDisplay with TIA-Portal a comprehensive
description including additive SIWAREX FTA parameters and commands can be
found on the configuration package or in the
internet under
http://support.automation.siemens.com/WW/view/en/17831309/133300

Preface
SIWAREX FTA
1-2
The layout of this manual is based on activities that must be performed in the
scope of project planning, commissioning, operation and service / maintenance.
Chapter
Description of Content
1Preface
Notes on using this manual
2Scope of Delivery
Description of the SIWAREX FTA scope
of delivery
3Product Overview
Overview of
-Structure
- Functionality
- System integration
of SIWAREX FTA
4Hardware Planning and
Assembly
Description
- of individual hardware components
- of structure and installation
- of connections
- of operating preparation.
5Weighing Functions
6Commands
Description of commands that can be executed
by SIWAREX FTA
7Messages and
Diagnostics
Description of error messages with notes on
problem solutions
8Programming in
SIMATIC STEP 7
Description of data exchange with the
SIMATIC CPU. This chapter is only meant for
users who wish to write their own application
software.
9Project planning in
SIMATIC PCS 7
Description for the PCS 7 project planning
package
10 Commissioning using a
PC – SIWATOOL FTA
Description
- Software installation
- Software functions
11 Firmware-Update with
SIWATOOL FTA
Description
- Software installation
- Software functions
12 Calibrating Applications
Description of conditions for calibration
13 Accessories
Ordering information for optional components
such as:
-Digital remote display
-Micro Memory Card
-Exi-Interface
14 Technical Data
Technical Data
15 Index
16 Abbreviations
Table 1-2 Chapter Overview

Preface
SIWAREX FTA
1-3
1.4 Further Support
Do you have more questions about using the SIWAREX FTA? Then please contact
your Siemens representative in the office or business location that is responsible
for your area or technical support for SIWAREX - Tel.: [phone].
Updated information on SIWAREX Weighing Technology can be found on the
respective Internet Site.
http://www.siemens.com/siwarex

Scope of Delivery
SIWAREX FTA
2-4
2 Scope of Delivery
2.1 Scope of Delivery
A bus connector for the SIMATIC bus, the conformity details from the manufacturer
and a sheet of additional product information belong to the SIWAREX FTA scope
of delivery.
For planning your work with the SIWAREX FTA, you will need:
-The SIWAREX FTA project planning package for SIMATIC S7
or
-The SIWAREX FTA project planning package for SIMATIC PCS7
These are not components included in the scope of delivery and must be ordered
separately.
The corresponding project planning package is combined of the following
components:
-SIWATOOL commissioning program for Windows
-HSP 2036 (Hardware Support Package) for installation of the module in the
SIMATIC Manager hardware catalogue (only S7 classic)
-Standard software for operating the SIWAREX FTA in SIMATIC S7 and TIA-
Portal
-Manual in several languages
-Description of the SecureDisplay with TIA-Portal
-Quick Guides for fast commissioning
-Set-up for PCS7 Library (Project planning package for PCS7 only)
-SIWAREX FTA Secure OCX – AddOn for WinCC flexible for configuration of
the legal for trade display, at the moment only for S7 Classic (Overview of the
suitable panels see chap. 8.6)
Application sample software can be very helpful for the first programming steps.
This software can be downloaded, free-of-charge over the Internet
(www.siemens.com/siwarex).
With software packages:
-SIWAREX Multiscale for batch systems
-SIWAREX Multifill for filling/bagging operations

Scope of Delivery
SIWAREX FTA
2-5
there is a specially designed STEP 7 software available which enables a very
effective system software development.
The required optional accessories are provided in chapter 13 Accessories.

Product Overview
SIWAREX FTA
3-6
3 Product Overview
3.1 General Information
SIWAREX FTA (Flexible Technology, Automatic Weighing Instrument) is a
versatile and flexible weighing module which can be utilised wherever a scale
should fulfil its tasks automatically. Automatic scale operation is characterised by
an weighing procedure performed automatically according to a defined plan.
The function module (FM) SIWAREX FTA is integrated in SIMATIC and uses all
features of the modern automation system such as integrated communication,
diagnostics system and project planning tools to its advantage. The module can
also be used without SIMATIC, as a stand-alone module however.
The scale functionality of the SIWAREX FTA includes the non-automatic scale
(Non automatic weighing instrument conforming with OIML R-76), the automatic
scale for balancing (Automatic gravimetric filling Instrument conforming with OIML
R-61), the automatic scale for catch weighing (Automatic catch weighing
instrument conforming with OIML R-51) and the automatic scale for discontinuous
totalising (Discontinuous totalising automatic weighing instrument conforming with
OIML R-107)
3.2 Benefits
SIWAREX FTA is characterised by a few clear advantages:
oUniform structure and universal communication through the integration in the
SIMATIC S7 and SIMATIC PCS7
oUniform project planning with SIMATIC
oDirect application in SIMATIC automation system
oApplication in the decentralised system concept by connecting to PROFIBUS
DP/PROFINET through ET 200M
oWeight measurement or force to resolutions of 16 million parts
oPrecision of 3 x 6000d, calibratable (0.5 µV per e)
oCalibratable display with SIMATIC HMI standard operator panels
oMeasurement rates of internal 2.5 msec, external 10 msec
oExact dosage switching signals (< 1 msec)
oSeveral dosage speeds
oSmooth or step controlled dosage control
oParameter definable inputs and outputs

Product Overview
SIWAREX FTA
3-7
oAutomatic weighing operation parameter setting for different applications
oFlexible adjustment for various SIMATIC requirements
oSimple parameter definition with the SIWATOOL program through the RS 232
interface
oTheoretical adjustment without any adjustment weights possible
oModule exchanging without readjusting the scale is possible
oScale status recording
oIntrinsically safe load cell supply for Ex-Zone 1 (optional)
oApplication in Ex-Zone 2
oExtensive diagnostic functions
oStand–alone operation possible
3.3 Range of Application
SIWAREX FTA is the optimal solution wherever weighing technology requires high
speed and precision. Because of the high resolution (3 x 6000 d, calibratable),
scales can be built to work precisely over broad areas. Calibratable weighing
systems, whether a filling system, unloading station, bagging operation,
rotopacker, mixer or control stations can be constructed with the SIWAREX FTA.
Typical fields of application are e.g.:
oLiquid filling
oBagging in a packaging system
oWeighing catch levels as well as level decrease weighing and fill weighing
oCatch level testing
oMaterial loading with totalising
3.4 Structure
SIWAREX FTA is a function module (FM) of the SIMATIC S7-300 and can be read
directly on the SIMATIC S7-300- or ET 200M bus board. Installation / cabling
efforts for the 80 mm wide module are simplified with the profile rail assembly
(snap-in technology).
Connecting load cells, power supply and the serial interface is all done through the
40 pin standard front connector.
Operation of the SIWAREX FTA in SIMATIC guarantees complete integration of
weighing technology in the automation system.
In certain cases, the module can also be applied without the SIMATIC environment
in so-called stand-alone operation. The module then works as a compact module
that e.g. is connected to a PC.

Product Overview
SIWAREX FTA
3-8
3.5 Function
The primary task of the SIWAREX FTA consists of the precise measurement of the
current weight values in up to three measurement ranges and the exact control of
the weighing procedure. The control of the weighing procedure is completely run
from the weighing module as if in separately constructed weighing electronics. The
integration in SIMATIC enables the progress of the weighing procedure to be
influenced directly from the PLC program however. This enables reasonable task
distribution: The extremely fast weighing functions are performed in the SIWAREX
module, latching and signal linking is done in the PLC.
There are different automatic weighing procedures for which SIWAREX FTA can
be configured optimally by defining the corresponding parameters.
The following operating modes can be defined:
-Non Automatic Weighing Instrument – conforming with OIML R-76
-Automatic Gravimetric Filling Instrument – conforming with OIML R-61 (AWI)
-Automatic catch weighing instrument – conforming with OIML R51 (AWI)
-Automatic Totalising Filling Instrument- totalising – conforming with OIML R
107 (AWI)
During the weighing procedure, SIWAREX FTA monitors and controls a multitude
of signals. The optimised system internal data exchange enables a direct
evaluation of weighing signals and states in the PLC program.
The weighing procedure influence on the PLC enables a flexible adjustment to suit
the changes in the system technology.
SIWAREX FTA is already adjusted in-house. Therefore, the scale can be adjusted
to theoretical settings without using any adjustment weights and modules can be
exchanged without readjusting the scale. Exchanging modules during running
operation is also possible when working with “active bus modules”.
The SIWAREX FTA has two serial interfaces. An RS 485 interface is used for
connecting digital remote displays. A PC can be connected to the RS 232 interface
for setting SIWAREX FTA parameters.
The weighing module SIWAREX FTA can also be used in explosion hazard areas
(zones 21 and 22). Load cells are supplied with inherent safety with zone
1 applications using an optional Ex-interface SIWAREX IS.
If the regulation code OIML is set in the adjustment data, there will be a waiting
period of 60 seconds after rebooting the SIWAREX FTA before the weight value is
displayed. There is no waiting time when using digital load cells.