Group Four Transducers GLDM 64.1 User manual

GLDM 64.1 Technical Manual rev. 1.30 February
2020
Page 1 of 50
Load Cell Digital Module
Type GLDM
64.1
TECHNICAL MANUAL FIRMWARE TYPE 0 (BASIC)
INCLUDING COMMUNICATION PROFILE
CANOPEN
Firmware Version 64.181.v.3.00 or higher
Hardware Version 64.105.v.1.xx
Document No. X64 Rev 1.30 EN

GLDM 64.1 Technical Manual rev. 1.30 February
2020
Page 2 of 50
1. Table of Contents:
1. Table of Contents: .....................................................................................................................................2
2. Safety Instructions ....................................................................................................................................5
Introduction and Specifications...............................................................................................................7
3. Hardware and Wiring.................................................................................................................................8
3.1. Housing & Terminals....................................................................................................................................8
3.2. Terminals Load Cell Connection .................................................................................................................... 8
3.3. Load Cell Connection ...................................................................................................................................8
3.4. Terminals Power Supply ...............................................................................................................................9
3.5. Service Port RS 232 .....................................................................................................................................9
3.6. CANbus Interface ........................................................................................................................................ 9
3.7. Seal Switch ............................................................................................................................................... 10
3.8. Logic Inputs & Outputs .............................................................................................................................. 10
4. Communication and Getting started .....................................................................................................11
4.1. Serial Interface.......................................................................................................................................... 11
4.2. Command Language .................................................................................................................................. 11
4.3. Baud Rate................................................................................................................................................. 11
4.4. Getting Started.......................................................................................................................................... 11
5. Commands –Overview ...........................................................................................................................12
6. Commands Description ..........................................................................................................................14
6.1. System Diagnosis Commands –ID, IV, IS, SR, RS ........................................................................................ 14
6.1.1. ID Get Device Identity ....................................................................................................................................14
6.1.2. IV Get Firmware Version................................................................................................................................14
6.1.3. IS Get Device Status......................................................................................................................................14
6.1.4. SR Software Reset.........................................................................................................................................15
6.1.5. RS Read Serial Number.................................................................................................................................15
6.2. Calibration Commands –CE, CM n, CI, MR, DS, DP, CZ, CG, ZT, FD, IZ, ZR, ZI, TM, TN, ZN, AZ, AG, CS ........... 15
6.2.1. CE Read TAC* Counter / Open Calibration Sequence...................................................................................15
6.2.2. CM n Set Maximum Output Value................................................................................................................15
6.2.3. CI Set Minimum Output Value........................................................................................................................16
6.2.4. MR Set Multi-range / Multi-interval.................................................................................................................16
6.2.5. DS Set Display Step Size...............................................................................................................................16
6.2.6. DP Set Decimal Point Position.......................................................................................................................16
6.2.7. CZ Set Calibration Zero Point.........................................................................................................................17
6.2.8. CG Set Calibration Gain (Span).....................................................................................................................17
6.2.9. ZT Enable / Disable Zero Tracking.................................................................................................................17
6.2.10. FD Reset to Factory Default Settings.............................................................................................................17
6.2.11. IZ Correction of System Zero......................................................................................................................18
6.2.12. ZR Zero Range...............................................................................................................................................18
6.2.13. ZI Initial Zero Range.......................................................................................................................................18
6.2.14. TM Tare mode.............................................................................................................................................18
6.2.15. TN Set / Clear Non-Volatile Tare....................................................................................................................19

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6.2.16. ZN Set / Clear Non-Volatile Zero....................................................................................................................19
6.2.17. AZ Absolute zero point calibration (eCal).......................................................................................................19
6.2.18. AG Absolute gain calibration (eCal) ...............................................................................................................19
6.2.19. CS Save the Calibration Data ........................................................................................................................19
6.2.20. FT Firmware Type........................................................................................................................................20
6.3. Motion Detection Commands –NR, NT ........................................................................................................ 20
6.3.1. NR Set No-motion Range...............................................................................................................................20
6.3.2. NT Set No-motion Time..................................................................................................................................20
6.4. Filter Setting Commands –FM, FL, UR......................................................................................................... 21
6.4.1. FM Filter Mode...............................................................................................................................................21
6.4.2. FL Filter setting...............................................................................................................................................21
6.4.3. UR Update Rate and Averaging.....................................................................................................................22
6.5. Taring and Zeroing Commands –SZ, ZA, RZ, ST, RT, SP............................................................................... 22
6.5.1. SZ Set System Zero.......................................................................................................................................22
6.5.2. RZ Reset Zero................................................................................................................................................23
6.5.3. ST Set Tare....................................................................................................................................................23
6.5.4. RT Reset Tare................................................................................................................................................23
6.5.5. SP Set Preset Tare ........................................................................................................................................23
6.6. Output Commands –GG, GN, GT, GS, GW, GA, GL, OF ................................................................................. 24
6.6.1. GG Get Gross Value......................................................................................................................................24
6.6.2. GN Get Net Value ..........................................................................................................................................24
6.6.3. GT Get Tare Value.........................................................................................................................................24
6.6.4. GS Get ADC Sample Value ...........................................................................................................................24
6.6.5. GW Get Data String “Net, Gross and Status“.................................................................................................24
6.6.6. GA Get Triggered Average Value...................................................................................................................24
6.6.7. GL Get Data String “Average, Gross and Status“ ..........................................................................................25
6.6.8. OF Output Format for Data String GW and GL ..............................................................................................25
6.7. Auto–transmit Commands –SG, SN, SX, SA, SL............................................................................................ 26
6.7.1. SG Send Gross Value continuously...............................................................................................................26
6.7.2. SN Send Net Value continuously ...................................................................................................................26
6.7.3. SX Send ADC Sample Value continuously.....................................................................................................26
6.7.4. SA Send Triggered Average Value automatically ..........................................................................................26
6.7.5. SL Send Data String “Average, Gross and Status“ automatically ..................................................................26
6.7.6. SW Send Data String “Net, Gross and Status“ continuously..........................................................................26
6.8. Commands for External I/O Control –IN, IO and OM .................................................................................... 27
6.8.1. IN Read status of the logic inputs...................................................................................................................27
6.8.2. IO Read / modify the status of the logic outputs.............................................................................................27
6.8.3. OM Control of the logic outputs by the host application..................................................................................27
6.9. Setpoint Output Commands –S’n’, H’n’, A’n’, HT .......................................................................................... 28
6.9.1. S‘n’ Setpoint Value.........................................................................................................................................28
6.9.2. H’n’ Hysteresis and Switching Action for a Setpoint.......................................................................................28
6.9.3. A’n’ Allocation source for a Setpoint...............................................................................................................29
6.9.4. HT Hold time for all Setpoints.........................................................................................................................29
6.10. Communication Setup Commands –AD, CR, NA, NS, BR, DX ......................................................................... 30
6.10.1. AD Device Address –Serial channel .............................................................................................................30
6.10.2. NA Network Address - CANbus .....................................................................................................................30
6.10.3. NS Network Settings –For Serial Channel and CAN Interface...................................................................30
6.10.4. BR Baud Rate –Serial channel......................................................................................................................31
6.10.5. DX Full Duplex –Serial channel.....................................................................................................................31
6.11. Save Calibration and Setup Data Commands –CS, WP, SS, GI, PI.................................................................. 32
6.11.1. CS Save the Calibration Data ........................................................................................................................32
6.11.2. WP Save the Setup Parameters.....................................................................................................................32
6.11.3. SS Save Setpoint Parameters........................................................................................................................32
6.11.4. GI Get an Image File from the EEPROM .......................................................................................................32
6.11.5. PI Download an Image File to the EEPROM..................................................................................................32
6.12. Trigger Commands –SD, MT, GA, TE, TR, TL, SA ......................................................................................... 33
6.12.1. SD Start Delay Time.......................................................................................................................................33
6.12.2. MT Measuring Time .......................................................................................................................................33
6.12.3. GA Get Triggered Average Value...................................................................................................................33
6.12.4. TE Trigger Edge.............................................................................................................................................33
6.12.5. TR Software Trigger.......................................................................................................................................33
6.12.6. TL Trigger Level.............................................................................................................................................34
6.12.7. SA Send Triggered Average Value automatically ..........................................................................................34

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6.12.8. Example of Live Checkweigher Measurement with DOP4.............................................................................35
6.13. Re-Trigger Commands –RW, TT, TS, DT, TW and TI.................................................................................... 36
6.13.1. RW Trigger Window for Re-Trigger Function .................................................................................................36
6.13.2. TT Averaging Time for Re-trigger Function.................................................................................................36
6.13.3. TS Stop Value for Re-trigger Function.........................................................................................................36
6.13.4. DT Short-time Averaging Period..................................................................................................................36
6.13.5. TW Window for Automatic Taring...................................................................................................................37
6.13.6. TI Averaging Time for Automatic Taring.........................................................................................................37
6.13.7. Example of Live Multihead Scale Measurement with DOP4...........................................................................38
7. CANopen interface ..................................................................................................................................39
7.1. General .................................................................................................................................................... 39
7.2. The PDOs ................................................................................................................................................. 40
7.3. The SDOs ................................................................................................................................................. 41
7.4. Communication Profile ............................................................................................................................... 41
7.5. Object Directory ........................................................................................................................................ 41
8. Use in “Approved” Applications............................................................................................................50

GLDM 64.1 Technical Manual rev. 1.30 February
2020
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All rights reserved.
No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any
means, mechanical, photocopying, recording, or otherwise, without the prior written permission of Group Four
Transducers,
No patent liability is assumed with respect to the use of the information contained herein. While every
precaution has been taken in the preparation of this book, Group Four Transducers assumes no
responsibility for errors or omissions. Neither is any liability assumed for damages resulting from the use of
the information contained herein.
The information herein is believed to be both accurate and reliable. Group Four Transducers, however, would
be obliged to be informed if any errors occur. Group Four Transducers cannot accept any liability for direct or
indirect damages resulting from the use of this manual.
Group Four Transducers reserves the right to revise this manual and alter its content without notification at any
time.
Neither Group Four Transducers nor its affiliates shall be liable to the purchaser of this product or third parties
for damages, losses, costs, or expenses incurred by purchaser or third parties as a result of: accident,
misuse, or abuse of this product or unauthorized modifications, repairs, or alterations to this product, or failure
to strictly comply with Group Four Transducers operating and maintenance instructions.
Group Four Transducers shall not be liable against any damages or problems arising from the use of any
options or any consumable products other than those designated as Original Group Four Transducers
Products.
NOTICE: The contents of this manual are subject to change without notice.
Copyright © 2012-2020 by Group Four Transducers ApS, DK-3540 Lynge, Femstykket 6, Denmark
RIGHTS AND LIABILITIES
2. Safety Instructions
CAUTION READ this manual BEFORE operating or servicing this equipment. FOLLOW these
instructions carefully. SAVE this manual for future reference. DO NOT allow untrained personnel to
operate, clean, inspect, maintain, service, or tamper with this equipment. ALWAYS DISCONNECT
this equipment from the power source before cleaning or performing maintenance.
CALL Group Four Transducers for parts, information, and service.
WARNING ONLY PERMIT QUALIFIED PERSONNEL TO SERVICE THIS EQUIPMENT.
EXERCISE CARE WHEN MAKING CHECKS, TESTS AND ADJUSTMENTS THAT MUST BE
MADE WITH POWER ON. FAILING TO OBSERVE THESE PRECAUTIONS CAN RESULT IN
BODILY HARM.
WARNING FOR CONTINUED PROTECTION AGAINST SHOCK HAZARD CONNECT TO
PROPERLY GROUNDED OUTLET ONLY. DO NOT REMOVE THE GROUND PRONG.
WARNING DISCONNECT ALL POWER TO THIS UNIT BEFORE REMOVING THE FUSE OR
SERVICING.
WARNING BEFORE CONNECTING/DISCONNECTING ANY INTERNAL ELECTRONIC
COMPONENTS OR INTERCONNECTING WIRING BETWEEN ELECTRONIC EQUIPMENT
ALWAYS REMOVE POWER AND WAIT AT LEAST THIRTY (30) SECONDS BEFORE ANY
CONNECTIONS OR DISCONNECTIONS ARE MADE. FAILURE TO OBSERVE THESE
PRECAUTIONS COULD RESULT IN DAMAGE TO OR DESTRUCTION OF THE EQUIPMENTOR
BODILY HARM.
CAUTION OBSERVE PRECAUTIONS FOR HANDLING ELECTROSTATIC SENSITIVE
DEVICES.

GLDM 64.1 Technical Manual rev. 1.30 February
2020
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Introduction and Specifications
The model GLDM 64.1 is a very precise high-speed digital amplifier for weighing and force measurements with
strain gauge (SG) sensors. The GLDM 64.1 can be used in legal for trade (requires OIML R-76:2006 Part 1) as
well as for industrial applications.
The GLDM 64.1 features are CAN interface (supports CANopen protocol) and a full duplex RS232 interface
(supports a straight- forward ASCII command set).
The GLDM 64.1 and the well-known GLDU 78.1, both use nearly the same ASCII command set. The GLDM
64.1 with its accurate A to D converter and a sample rate of up to 1200 measurement values per second, is
particularly suitable for static or dynamic measurements and control purposes.
Specifications
Accuracy class
III or IIII
Test certificate according OIML R76
10 000 intervals or n x 10 000 intervals
(n = 1, 2, 3)
Maximum number of verification scale intervals (n)
10 000
Minimum input voltage per VSI
µV
0.2
Measuring range (FS)
mV/V
±3.3
Maximum resolution at FS (approx.)
incr.
±880000
Measuring rate
Hz
9.4 to 1200
Digital filter cut-off frequency (-3dB)
Hz
0.25 to 18
Bridge excitation voltage
VDC
5
Linearity error (relative to full scale)
%
±0.0005
Temperature effect on zero (relative to full scale)
%/10 K
±0.0003 (Typical)
Temperature effect on span
%/10 K
±0.001 (Typical)
Interface 1 (of GLDM 64.1)
CAN
Bit rate
kbits/s
10 to 1000
Protocol
CAN Open (CAN2.0B)
Interface 2 (of GLDM 64.1)
RS-232
Baud rate
bits/s
9600 to 460800
Frame format
8 data bits, 1 stop bit, no parity bits
Protocols
Readable ASCII
DIN Rail Port (of GLDM 64.1)
CAN
Bit rate
kbits/s
10 to 1000
Protocol
CAN Open (CAN2.0B)
Communication GLDM 64.1 to Gateway EGM
187.1
CAN Open (CAN2.0B)
Address range
1 to 99
Logical inputs
4
Maximum input voltage
VDC
30
Threshold voltage (approx.)
VDC
6
Input resistance (approx.)
kΩ
8
Logical outputs
4
Maximum voltage
VDC
30
Maximum current
A
1.0
Supply voltage
VDC
10 to 30
Power consumption
@ 24VDC and 350 Ω Load Cell
W
<0.75
Operating temperature range
°C
-15 to +55
Storage temperature range
°C
-30 to +70

GLDM 64.1 Technical Manual rev. 1.30 February
2020
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3. Hardware and Wiring
3.1. Housing & Terminals
Scale informations for ‘legal for trade’ use
Front Panel Terminals of GLDM 64.1
3.2. Terminals Load Cell Connection
GLDM
64.1
Load cell
input
Function
Pin no.
8
+ Exc
+Excitation for load cell
9
+ Sen
+ Sense for load cell
10
+ Inp
+ Signal of load cell
11
Shld.
Shield load cell
12
–Inp
–Signal of load cell
13
–Sen
–Sense for load cell
14
–Exc
–Excitation for load cell
Colour code of standard load cells (e.g.Group Four)
3.3. Load Cell Connection
The load cell wiring should be made carefully before energizing to avoid damages to the amplifier and the load
cells. The input resistance of the load cells that you want to connect should be ≥ 50 Ω (ohms).
In case of using a load cell/scale with 4 wire cable, you have to short-circuit (bridge) the pins 8 & 9 and 13 & 14.
Remark: Please don’t shorten the 4 wire cable of a load cell, as the cable is part of the factory calibration
(signal & temperature compensation).

GLDM 64.1 Technical Manual rev. 1.30 February
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GLDM
64.1
Power in
Function
Pin no.
1
+
Power supply +10...30 V DC
2
-
Common ground / 0 V DC
3
Shld
.
Chassis ground
GLDM 64.1
RS 232
Functi
on
Pin no.
3
Rx
Receive Data
2
Tx
Transmit Data
5
GND
Signal ground RS 232
3.4. Terminals Power Supply
Depending on the grounding concept of the plant/scale, terminal 2 has to be connected to terminal 3.
Terminal 11 (shld. load cell) and 3 (Ground chassis) are internal connected.
Note: The power supply must be able to supply about 0.75W per GLDM 64.1.
3.5. Service Port RS 232
The service port RS 232 can be used for communication with a PC or PLC system, in parallel to the
CAN open interface.
The serial port supports ASCII Protocol.
3.6. CANbus Interface
The CANbus interface can be used for communication in a CANopen network
with transmission speed 10 ... 1000 kbit/s.
- The CAN lines CANH (5) and CANL (4) can be connected to aCANopen
master.
- Termination resistors must be present in the CAN network. A 120 Ω resistor
inside the GLDM 64.1 can be switched ON/OFF (using jumper 6).
- When used with the Gateway EGM 187.1, one 120Ω termination resistor is
present inside the gateway. The last GLDM on the CAN bus must also
have its termination resistor connected.
The factory default settings for communication are address 1 and
transmission speed 500 kbit/s.
Note: CANopen communication profile is described in this manual, see chapter 9 (pages 39 ff).
For changing the CAN address via front panel, just use the
Up/Down buttons below the Address display.

GLDM 64.1 Technical Manual rev. 1.30 February
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Terminal
Connection
Function
15
IN 0
Logic Input 0
16
IN 1
Logic Input 1
17
IN 2
Logic Input 2
18
IN 3
Logic Input 3
19
C
Common of Input’s 0/1/2/3: 0V
20
OUT 0
Logic Output 0
21
OUT 1
Logic Output 1
22
OUT 2
Logic Output 2
23
OUT 3
Logic Output 3
24
C
Common of Output’s 0/1/2/3:
12 ... 24V or 0V
3.7. Seal Switch
Setup or changes of calibration can only be performed with an open
seal switch (7). Changes lead to get a new TAC value of +1.
Running a legal for trade application needs the jumper connected to
the switch pins and a seal. A broken seal shows up changes of
calibration, which are not allowed.
Protected commands see below.
Traceable Access Code (TAC) protected calibration commands
In case the seal switch is closed, the following commands or menus can’t be proceeded:
- Calibration Zero
- Calibration Gain
- Calibration Absolute Zero
- Calibration Absolute Gain
- Calibration Minimum
- Calibration Maximum
- Zero Tracking
- Zero Range
- Display Step Size
- Decimal Point
- Calibration Save
- Factory Default
- Non Volatile Tare
- Non Volatile Zero
- Initial Zero @ power ON
3.8. Logic Inputs & Outputs
The GLDM 64.1 offers 4 isolated logic inputs and 4 isolated logic outputs, all “floating”.
The input 0 can get the function to act as Trigger Button for a measurement, see chapter 8.12.6.
The 4 outputs act as switches for setpoints with hysteresis, switch behavior etc. Several bases can be used like
gross weight, net weight or average weight value, see chapter 8.9.x.
Note for Logic Inputs: The pulse duration must be at least 50ms.
Note for Logic Outputs: The connection C can be used for either ‘high’ level (24V AC/DC) or ‘low’ level (0V).

GLDM 64.1 Technical Manual rev. 1.30 February
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4. Communication and Getting started
4.1. Serial Interface
Communicating with the GLDM 64.1 is carried out e.g. via serial port RS 232.
The data format is the familiar 8/N/1 structure (8 data bits, no parity, 1 stop bit).
Available baud rates via RS232 port are: 9600, 19200, 38400, 57600, 115200, 230400 and 460800 baud.
Factory default: 115200 baud
4.2. Command Language
The command setup is based on a simple ASCII format (2 letters). This enables the user to setup the device,
get results or check parameters.
Example: Connect the GLDM 64.1 via the RS232 port to a PC / PLC system. You want to get the
identity, firmware version or net weight.
Remark: In this manual means: Space “_“ and Enter (CR/LF) ““
Master (PC / SPS) sends
Slave (GLDM 64.1)
responds
Meaning
ID
D:6410
Identity of the device
IV
V:0131
Firmware version of the device
GN
N+1234.56
Net weight with algebraic sign/floating point
4.3. Baud Rate
For baud rate setup use command BR, see chapter 8.10.4.
Factory default: 115200 baud
4.4. Getting Started
You will require:
• PC or PLC with a RS232 communication port.
• One GLDM 64.1, connected to a load cell or scale.
• A 12 to 24 VDC power supply capable of delivering approximately 0.75 W.
• One or more GLDM 64.1
• A suitable ASCII communication software **
Refer to the wiring diagram in chapter 5.
**
You can easily communicate between a PC and a GLDM 64.1 using programs such as Procomm,
Telemate, Kermit, HyperTerminal or HTerm etc.
Additional the powerful software DOP 4 (version 2.1.0.0 or higher) with graphical user interface and
oscilloscope function for the operating systems Windows XP / Vista / 7 / 8 / 10 is available.

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5. Commands –Overview
Command
Short description
Parameter value
Page
AD
Communication: Device Address
0...255
29
A‘n’
Allocation source for a set point
0, 1 or 2
28
AZ
Absolute zero point calibration
± 33000
18
AG
Absolute gain calibration
± 33000
18
BR
Communication: Baud Rate
9600…460800 baud
30
CE
Calibration: Open Calibration Sequence; Read TAC Counter
0...65535
14
CG
Calibration: Set Calibration Gain (Span) at Load > Zero
1...999999 d
16
CI
Calibration: Minimum Output Value
–999999...0 d
15
CL
Close communication (For compatibility only)
None
CM‘n’
Calibration: Set Maximum Output Value (n = 1, 2 or 3)
0...999999 d
14
CS
Save the Calibration Data (CM, CI, DS, DP, etc.) to the EEPROM
None
18, 31
CZ
Calibration: Set Calibration Zero Point –Scale without Load
None
16
DP
Calibration: Set Decimal Point Position
0...6
15
DS
Calibration: Set Display Step Size
1, 2, 5, 10, …, 500 d
15
DT
Trigger function: Calculation Time for Short-time Average
0...65535 ms
35
DX
Communication: Set Full-duplex (1) (For compatibility only)
1 (fix)
FD
Factory default settings: Write Data to the EEPROM (TAC protected)
None
16
FM
Digital filter: Filter Mode
0…1
20
FL
Digital filter: Filter Cut-off Frequency
0...8
20
FT
Firmware Type
0, 1 or 3
19
GA
Output: Get Triggered Average Value
None
23, 32
GG
Output: Get Gross Value
None
23
GI
Retrieves an image file from the LDU’s EEPROM
None
31
GL
Output: Get Data String “Average/Gross/Status“
None
24
GN
Output: Get Net Value
None
23
GS
Output: Get ADC Sample Value
None
23
GT
Output: Get Tare Value
None
23
GW
Output: Get Data String “Net/Gross/Status“
None
23
H‘n‘
Setpoints: Hysteresis for Setpoint S0 (H0), S1 (H1) etc.
-32768…+32767d
27
HT
Trigger function: Hold time for Violation of Setpoint Limit
0...65535 ms
28
ID
Device information: Identify Device
None
13
IN
Logical Input: Input Status
None
26
IO
Logical Output: Output Status
0000…1111
26
IS
Device information: Identify Device Status
None
13
IV
Device information: Identify Firmware Version
None
13
IZ
Calibration: Correction of System Zero
None
17
MR
Calibration: Define Multi-interval (0) or Multi-range (1)
0 or 1
15
MT
Trigger function: Measuring Time for Averaging
0...3000 ms
32
NA
Network Address (CAN Open address)
1 …127
29
NR
Motion detection: No-motion Range
0...65535 d
19
NS
Network Settings (CAN Interface, Serial channel)
0 …1
29
NT
Motion detection: No-motion Time Period
0...65535 ms
19
OF
Output Format of Data String GL and GW
0…3
24
OM
Output Mask
0000…1111
26
ON
Open communication and send net weight (For compatibility only)
1…255
OP
Open communication (For compatibility only)
1…255
PI
Download a saved image file to the LDU’s EEPROM
None
31
PF
Pre-filter (anti aliasing filter) ON / OFF
0 or 1
20

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Command
Short description
Parameter value
Page
RS
Device information: Read serial number
None
14
RT
Scale function: Reset Tare
None
22
RW
Trigger function: Trigger Window for Re-trigger Function
0...65535 d
35
RZ
Scale function: Reset Zero Point
None
22
SA
Auto-transmit: Send Triggered Average Value automatically
None
25, 33
SD
Trigger function: Start Delay
0... 65535 ms
32
SG
Auto-transmit: Send Gross Value continuously
None
25
SL
Auto-transmit: Send Data String „Average/Gross/Status“ continuously
None
25
SN
Auto-transmit: Send Net Value continuously
None
25
S‘n‘
Setpoints: Setup of Setpoints S0 to S3
-999999...+999999 d
27
SP
Preset Tare value
0...999999 d
22
SR
Software Reset
None
14
SS
Save the Setpoint Data (Sx, Hx, Ax) to the EEPROM
None
31
ST
Scale function: Set Tare
None
22
SW
Auto-transmit: Send Data String “Net/Gross/Status“ continuously
None
25
SX
Auto-transmit: Send ADC Sample Value continuously
None
25
SZ
Scale function: System Zero Point
None
21
TD
Transmit delay (For compatibility only)
0…255 ms
TE
Trigger function: Trigger on Rising Edge (1) or Falling Edge (0)
0 or 1
32
TI
Trigger function: Averaging Time for Automatic Tarring
0...65535 ms
36
TL
Trigger function: Trigger Level
0...999999 d
33
TM
Calibration: Tare mode
0…3
17
TN
Calibration: Set/Clear non-volatile tare
0 or 1
18
TR
Trigger function: Software Trigger
None
32
TS
Trigger function: Stop Value for Re-trigger Function
0...65535 d
35
TT
Trigger function: Averaging Time for Re-trigger Function
0...65535 ms
35
TW
Trigger function: Window for Automatic Tarring
0...65535 d
36
UR
Digital filter: Update Rate
0, 1, 2...7
21
WP
Save the Setup Data (FL, NR, NT, AD, BR, DX) to the EEPROM
None
31
ZI
Calibration: Initial Zero Range
0...999999 d
17
ZN
Calibration: Set/Clear non-volatile zero
0 or 1
18
ZR
Calibration: Zero Range
0...999999 d
17
ZT
Zero Tracking: Range
0…255
16

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6. Commands Description
For better clarity, all commands are divided into groups as described on the following pages.
Note:
In the blue brakets and letters [….] you see the CANbus index 0xYYYY and sub-index 0xZZ; if [n.a.] is
mentioned, the command is not available for CANbus.
6.1. System Diagnosis Commands –ID, IV, IS, SR, RS
Use these commands you get the GLDM 64.1 type, firmware version or device status. These commands are
sent without parameters.
8.1.1. ID Get Device Identity
[ SDO 2900 sub 08 ]
Master (PC / SPS) sends
Slave (GLDM 64.1)
responds
ID
D:6410
The response to this request gives the actual identity of the device. This is particularly useful when trying to
identify different device types on a bus.
8.1.2. IV Get Firmware Version
[ SDO 2900 sub 09 ]
Master (PC / SPS) sends
Slave (GLDM 64.1)
responds
IV
V:0300
The response to this request gives the firmware version of the device.
8.1.3. IS Get Device Status
[ SDO 2900 sub 0A ]
Master (PC / SPS) sends
Slave (GLDM 64.1)
responds
IS
S:067000 (example)
The response to this request comprises of two 3-digit decimal values (067 and 000), which can be decoded
according to the table below:
Bit
Leftmost 3-digit value
Rightmost 3-digit value
0
1 Signal stable (no motion)
1 (not used)
1
2 Zeroing action performed
2 (not used)
2
4 Tare
4 (not used)
3
8 Center zero
8 (not used)
4
16 Input 0
16 (not used)
5
32 Input 1
32 (not used)
6
64 Setpoint 0
64 (not used)
7
128 Setpoint 1
128 (not used)
The example decodes the result S:067000 as follows:
• Signal stable (no motion) [ = 1]
• Zeroing action performed [ = 2]
• Tare not active [ = 0]
• Weight <> 0 [ = 0]
• Input 0 not active [ = 0]
• Input 1 not active [ = 0]
• Setpoint 0 active [ = 64]
• Setpoint 1 not active [ = 0]

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8.1.4. SR Software Reset
[ SDO 2007 sub 04 ]
Master (PC / SPS) sends
Slave (GLDM 64.1)
responds
SR
OK
This command will respond with ‘OK’ and after maximum 400 ms perform a complete reset of the GLDM. It
has the same functionality as power OFF and ON again.
8.1.5. RS Read Serial Number
[ SDO 2900 sub 0C ]
Issuing the RS command will return the current serial number in the format S+12345678.
Master (PC / SPS) sends
Slave (GLDM 64.1) responds
Meaning
RS
S+00244373
Request: SN = 244373
6.2. Calibration Commands –CE, CM n, CI, MR, DS, DP, CZ, CG, ZT, FD,
IZ, ZR, ZI, TM, TN, ZN, AZ, AG, CS
8.2.1. CE Read TAC* Counter / Open Calibration Sequence
[ SDO 2300 sub 03 ]
With this command you can read the TAC counter (*TAC = Traceable Access Code) or you can open a
calibration sequence.
Master (PC / SPS) sends
Slave (GLDM 64.1) responds
Meaning
CE
CE+00017 (example)
TAC counter = 17
CE17
OK
Calibration sequence active
This command must be issued PRIOR to any attempt to set the parameters in the calibration group of
commands. In legal for trade applications the TAC counter can be used to check if critical parameters have
been change without re-verification. After each calibration save (CS) the TAC counter increases by +1.
8.2.2. CM n Set Maximum Output Value
[ CM / CM1: SDO 2300 sub 07 ] [ CM2: SDO 2300 sub 0E ] [ CM3: SDO 2300 sub 0F ]
This command (CM n with n = 1, 2 or 3) is used to set up the maximum output value (respective the switching
point in multi range applications). Permitted values are from 0 to 999999.
Master (PC / SPS) sends
Slave (GLDM 64.1) responds
Meaning
CM1
M+030000
Request: CM1 = 30000 d
CE
E+00017 (example)
Request: TAC counter CE17
CE17
OK
Calibration sequence active
CM1_50000
OK
Setup: CM1 = 50000 d
This value will determine the point at which the output will change to “ooooooo”, signifying over-range
respective the point at which the output will change the measuring range / interval size.
Application
CM 1 = MAX 1
CM 2 = MAX 2
CM 3 = MAX 3
Single range
CM 1 = 1...999999
CM 2 = 0
(means CM 2 not used)
CM 3 = 0
(means CM 3 not used)
Dual range or dual interval
(→Command MR)
CM 1 = 1...MAX 1
CM 2 = MAX 1...999999
Triple range or triple interval
(→Command MR)
CM 1 = 1...MAX 1
CM 2 = MAX 1...MAX 2
CM 3 = MAX 2...999999
It is necessary: 1 MAX 1 < MAX 2 < MAX 3 999999
Note: The range, in which a scale can be set to zero (SZ) or automatic zero tracking (ZT) is active, is +/- 2% of
CM value. Factory default: CM1 = 999999, CM 2 = 0, CM 3 = 0

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8.2.3. CI Set Minimum Output Value
[ SDO 2300 sub 08 ]
This command is used to set up the minimum output value. Permitted values are from –999999 to 0.
Master (PC / SPS) sends
Slave (GLDM 64.1) responds
Meaning
CI
I–000009
Request: CI = –9 d
CE
E+000017 (example)
Request: TAC counter CE17
CE17
OK
Calibration sequence active
CI-10000
OK
Setup: CI = -10000 d
This value will determine the point at which the output will change to “uuuuuuu”, signifying under-range.
Note: In bipolar applications (e.g. force- or torque measurements) this parameter defines the max. output value
for input signals with negative sign.
Factory default: CI = –999999
8.2.4. MR Set Multi-range / Multi-interval
[ SDO 2300 sub 0D ]
This command is only relevant, if CM 2 > 0 or CM 3 > 0. Is this the case, then this command defines, if the
application is multi-range or multi-interval. Permitted values are 0 (Multi-interval) or 1 (Multi-range).
Master (PC / SPS) sends
Slave (GLDM 64.1) responds
Meaning
MR
M+00000
Request: MR = 0 (Multi-interval)
CE
E+00017 (example)
Request: TAC counter CE17
CE17
OK
Calibration sequence active
MR1
OK
Setup: MR = 1 (Multi-range)
Note: Single range applications ignore this parameter.
8.2.5. DS Set Display Step Size
[ SDO 2300 sub 0C ]
This command allows the output to step up or down by a unit other than 1.
Permitted values are 1, 2, 5, 10, 20, 50, 100, 200 and 500.
Master (PC / SPS) sends
Slave (GLDM 64.1) responds
Meaning
DS
S+00002
Request: Step size 2
CE
E+00017 (example)
Request: TAC counter CE17
CE17
OK
Calibration sequence active
DS50
OK
Setup: Step size 50
Legal for trade applications allow for up to 10000 intervals. The allowed step size has to be considered.
8.2.6. DP Set Decimal Point Position
[ SDO 2300 sub 0B ]
This command allows the decimal point to be positioned anywhere between leftmost and rightmost digits of the
6-digit output result. Permitted values are 0, 1, 2, 3, 4, 5 and 6. Position 0 means no decimal point.
Factory default: DP = 3
Master (PC / SPS) sends
Slave (GLDM 64.1) responds
Meaning
DP
P+00003
Request: Position of decimal point 3
CE
E+00017 (example)
Request: TAC counter CE17
CE17
OK
Calibration sequence active
DP0
OK
Setup: no decimal point

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8.2.7. CZ Set Calibration Zero Point
[ SDO 2300 sub 0A ]
This is the reference point for all weight calculations and is subject to TAC control. The calibration will be
terminated with an error message (“ERR“) if the signal is not stable within 10 seconds.
Factory default: approx. 0 mV/V input signal
Master (PC / SPS) sends
Slave (GLDM 64.1) responds
Meaning
CE
E+00017 (example)
Request: TAC counter CE17
CE17
OK
Calibration sequence active
CZ
OK
Zero point saved
8.2.8. CG Set Calibration Gain (Span)
[ SDO 2300 sub 04 ]
This is the reference point for calibration under load and is subject to TAC control.
Permitted values are from 1 to 999999.
Factory default: 20000 = 2.000 mV/V input signal
Master (PC / SPS) sends
Slave (GLDM 64.1) responds
Meaning
CG
G+010000
Request: Calibration weight = 10000 d
CE
E+00017 (example)
Request: TAC counter CE17
CE17
OK
Calibration sequence active
CG15000
OK
Setup: Calibration weight = 15000 d
For calibrating an input signal near the display maximum (CM) will give the best system performance. The
minimum calibration load of at least 20% are recommended. The calibration will be terminated with an error
message if the signal is not stable within 10 seconds. Or if the input signal difference to the zero-point
calibration is less than approx. ±0.02mV/V then the GLDM will respond with an error message (“ERR”), too.
8.2.9. ZT Enable / Disable Zero Tracking
[ SDO 2100 sub 12 ]
This command enables or disables the zero tracking. ZT = 0 disables the zero tracking and ZT = 1 or higher
enables the zero tracking. Issuing the command without any parameter returns the current ZT value. Permitted
values are 0 to 255.
Factory default: ZT = 0 [Disable]
Master (PC / SPS) sends
Slave (GLDM 64.1) responds
Meaning
ZT
Z:001
Request: ZT status
CE
E+00017 (example)
Request: TAC counter CE17
CE17
OK
Calibration sequence active
ZT0
OK
Setup: ZT = Disable
Zero tracking will be performed only on results less than ZT range at a rate of 0.4 d/sec, where d = display step
size (see DS command). The zero can only be tracked to +/- 2% of maximum (see CM n command).
ZT = 1 means ±0.5 d and ZT = 100 means ±50 d
8.2.10. FD Reset to Factory Default Settings
[ SDO 2006 sub 02 ]
This command puts the GLDM 64.1 back to a known state. The data will be written to the EEPROM and the
TAC will be incremented by +1.
Note: All calibration and setup information will be lost by issuing this command!
Master (PC / SPS) sends
Slave (GLDM 64.1) responds
Meaning
CE
E+00017 (example)
Request: TAC counter CE17
CE17
OK
Calibration sequence active
FD
OK
Factory default setting
Note for CANbus port: The command FD does not change any of the CANbus settings after proceeding a FD.
The setting of firmware type FT remains unchanged, too.

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8.2.11. IZ Correction of System Zero
[ n.a. ]
This command can correct the system zero after a successful calibration, e.g. to correct the unknown weight of
a mounting accessory which was used to hold the calibration weight during the calibration procedure. By a
simple parallel shift of the gain curve the sensitivity of the scale will stay unaffected.
Master (PC / SPS) sends
Slave (GLDM 64.1) responds
Meaning
CE
E+00017 (example)
Request: TAC counter CE17
CE17
OK
Calibration sequence active
IZ
OK
System zero corrected
8.2.12. ZR Zero Range
[ SDO 2300 sub 11 ]
Sets the zero range manually –this is the range in increments within which the weighing scale can be zeroed.
Issuing the ZR command without any parameter will return the current value. Permitted values are between the
lower limit of 0 (= factory default setting) and the upper limit of 999999. A value of zero enables the standard
zero range of +/-2% of max.
Master (PC / SPS) sends
Slave (GLDM 64.1) responds
Meaning
CE
E+00017 (example)
Request: TAC counter CE17
CE17
OK
Calibration sequence active
ZR100
OK
Setup: Zero range = 100 d
8.2.13. ZI Initial Zero Range
[ SDO 2300 sub 10 ]
Define the initial zero range (0...999999 d). If ZI is non-zero the device will perform an automatic Set-Zero when
the weight stabilizes with the No-motion settings and the weight is within the ZI range.
Factory default: 0.
Master (PC / SPS) sends
Slave (GLDM 64.1) responds
Meaning
CE
E+00017 (example)
Request: TAC counter CE17
CE17
OK
Calibration sequence active
ZI100
OK
Setup: Initial Zero range = 100 d
8.2.14. TM Tare mode
[ SDO 2300 sub 12 ]
This command sets the tare mode. The tare modes are defined in the table below.
Master (PC / SPS) sends
Slave (GLDM 64.1) responds
Meaning
CE
E+00017 (example)
Request: TAC counter CE17
CE17
OK
Calibration sequence active
TM1
OK
Setup: Tare mode = 1
Tare modes:
TM
Allow tare of negative values
Clear preset tare at return to range 1
0 (Default)
Yes
Yes
1
No
Yes
2
Yes
No
3
No
No
Note: For OIML R76 compatible applications a tare mode of 1 must be used.

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8.2.15. TN Set / Clear Non-Volatile Tare
[ SDO 2300 sub 13 ]
This command sets the tare mode to volatile or non-volatile. Value range is 0 or 1; Factory default is 0 (volatile).
If set to 1 (non-volatile), every set/clear tare will write the value directly to the EEPROM.
Master (PC / SPS) sends
Slave (GLDM 64.1) responds
Meaning
CE
E+00017 (example)
Request: TAC counter CE17
CE17
OK
Calibration sequence active
TN
T:000
Actual setting: TN = volatile
TN1
OK
Setup: TN = non-volatile
8.2.16. ZN Set / Clear Non-Volatile Zero
[ SDO 2300 sub 14 ]
This command sets the zero mode to volatile or non-volatile. Value range is 0 or 1; Factory default is 0
(volatile). If set to 1 (non-volatile), every set/clear zero will write the value directly to the EEPROM.
Master (PC / SPS) sends
Slave (GLDM 64.1) responds
Meaning
CE
E+00017 (example)
Request: TAC counter CE17
CE17
OK
Calibration sequence active
ZN
Z:000
Actual setting: ZN = volatile
ZN1
OK
Setup: ZN = non-volatile
8.2.17. AZ Absolute zero point calibration (eCal)
[ SDO 2300 sub 02 ]
The command AZ is used as reference point for all weight calculations and will setup in mV/V.
Permitted values are ± 33000 (= ± 3.3000 mV/V).
Master (PC / SPS) sends
Slave (GLDM 64.1) responds
Meaning
AZ
Z+00796
Request: Zero point @ 0.0796 mV/V
CE
E+00017 (example)
Request: TAC counter CE17
CE17
OK
Calibration sequence active
AZ_00500
OK
New: Zero point @ 0.0500 mV/V
Factory default: 00 000d @ 0.0000mV/V input signal.
8.2.18. AG Absolute gain calibration (eCal)
[ SDO 2300 sub 01 ]
The command AG is used as absolute gain (or measuring range) for all weight calculations and will setup in
mV/V. Permitted values are ± 33000 (= ± 3.3000 mV/V).
Master (PC / SPS) sends
Slave (GLDM 64.1) responds
Meaning
AG
G+001868,+010000
Request: gain 10 000d @ 0.1868 mV/V
CE
E+00017 (example)
Request: TAC counter CE17
CE17
OK
Calibration sequence active
AG_+011200_+005000
OK
New: gain 5 000d @ 1.12 mV/V
Factory default: 20 000d @ 2.0000mV/V input signal.
8.2.19. CS Save the CalibrationData
[ SDO 2004 sub 02 ]
This command results in the calibration data being saved to the EEPROM and causes the TAC to be
incremented by 1.
Master (PC / SPS) sends
Slave (GLDM 64.1) responds
Meaning
CE
E+00017 (example)
Request: TAC counter CE17
CE17
OK
Calibration sequence active
CS
OK
Calibration values saved
The CS command saves all of the calibration group values, as set by CZ, CG, CM‘n’, DS, DP and ZT. The
command returns ERR and has no updating action unless it is proceded by the cmd CE_XXXXX.

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8.2.20. FT Firmware Type
[ SDO 2300 sub 0x15 ]
The GLDM 64.1 with firmware version 64.181.v.3.00 or higher can be used to run different applications.
The respective firmware type can be freely selected with the FT command.
The firmware types FT:
FT = 0 is the basic version with checkweigher and re-trigger functions, content of this manual.
The device ID for this firmware type is 6410.
FT = 1 is the version for optimized ‘DOSE IN‘ of fluids, e.g. a weighing filler for bottles with coarse, medium and
fine feed. The device ID for this firmware type is 6414.
FT = 3 is the version for ‘DOSE OUT‘ materials, e.g. into a keg / bag / bottle etc. with coarse, medium and fine
feed. The device ID for this firmware type is 6416.
Factory default: FT=0.
Note:
Please note that the firmware type selection is locked in the same way as the calibration, that means it must be
unlocked with the command "CE n" before the firmware type can be set. After new FT setting, it must be saved
with the command "CS".
6.3. Motion Detection Commands –NR, NT
The motion detection facility provides a means of disabling certain functions whenever a condition of instability,
or “motion”, is detected. The “no motion” or “stable” condition is achieved whenever the signal is steady for the
period of time set by NT, during which it cannot fluctuate by more than NR increments. The stable condition
activates the relevant bit of responses to “Info Status” (IS).
Following functions are disabled if motion is detected: “Calibrate Zero” (CZ) “Calibrate Gain” (CG) “Set Zero”
(SZ) and “Set Tare” (ST). After such a command the system returns an error (“ERR“), if the signal is not stable.
8.3.1. NR Set No-motion Range
[ SDO 2100 sub 0A ]
This is the range within which the weighing signal is allowed to fluctuate and still be considered as “stable”.
Permitted values are from 0 to 65535.
Master (PC / SPS) sends
Slave (GLDM 64.1) responds
Meaning
NR
R+00010
Request: NR = 10 d
NR2
OK
Setup: NR = 2 d
WP
OK
Setup saved
Example: For NR = 2 the fluctuations within a maximum of ± 2 d, in the period NT, will be considered “stable”.
Factory default: NR = 1 [= ±1d]
8.3.2. NT Set No-motion Time
[ SDO 2100 sub 0B ]
This is the period of time (in milliseconds) over which the weight signal is checked to be “stable” or not. The
weight signal has to vary by less than NR divisions over the period of time NT to be considered ‘stable’.
Permitted values are from 0 to 65535.
Master (PC / SPS) sends
Slave (GLDM 64.1) responds
Meaning
NT
T+01000
Request: NT = 1000 ms
NT500
OK
Setup: NT = 500 ms
WP
OK
Setup saved
If the value of NT = 500 milliseconds, the output must not fluctuate more than NR increments within 500
milliseconds in order to be considered “stable”.
Factory default: NT = 1000 [ms]

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6.4. Filter Setting Commands –FM, FL, UR
A digital filter can be set which will eliminate most of the unwanted disturbances. The commands FM and FL
are used to define the digital filter settings, the command UR is used to define an averaging of up to 128
measurement values. Please note that these filters are positioned immediately after the A/D Converter and
therefore affect all aspects of the weighing operation.
8.4.1. FM Filter Mode
[ SDO 2100 sub 09 ]
This command defines the filter mode. Choose the filter mode for your application.
Permitted values are “0” for IIR filter and “1” for FIR filter.
Master (PC / SPS) sends
Slave (GLDM 64.1) responds
Meaning
FM
M+00000
Request: FM = 0 (IIR filter)
FM0
OK
Setup: FM = 0 (IIR filter)
WP
OK
Setup saved
The digital IIR filter operates as 2nd order low pass filter and Gaussian characteristics. The attenuation is
40dB/decade (12 dB/octave).
The digital FIR filter works as a low-pass filter with quick response; damping see table mode 1.
Factory default: 0 (IIR filter)
8.4.2. FL Filter setting
[ SDO 2100 sub 04 ]
This command defines the 3dB filter cut-off frequency.
Master (PC / SPS) sends
Slave (GLDM 64.1) responds
Meaning
FL
F+00003
Request: FL = 3 (4 Hz)
FL1
OK
Setup: FL = 1
WP
OK
Setup saved
The permitted settings are from 0 to 8 (see below table).
Factory default: 3.
Mode 0 (IIR filter) Settings / Characteristics
FL
Settling time to 0.1%
(ms)
3 dB Cut-off
frequency (Hz)
Damping @ 300 Hz
(dB)
Output rate*
(samples/s)
0
No filtering
**
1172
1
55
18
57
1172
2
122
8
78
1172
3
242
4
96
1172
4
322
3
104
1172
5
482
2
114
1172
6
963
1
132
1172
7
1923
0.5
149
1172
8
3847
0.25
164
1172
* Output rate = 1172/2UR samples/s ** Pre-filter 18 Hz
** Note: The pre-filter can be switch ON and OFF with the command PF –settings are 0 (OFF) or 1(ON).
- This feature can be used with ASCII communication or CANbus [ SDO 2100 sub 16 ].
- The use is for specialists only.