POSITAL FRABA User manual

ABSOLUTE ROTARY ENCODER
IXARC EXPLOSION PROOF PROFIBUS-DP
Absolute Rotary Encoder
IXARC EXPLOSION PROOF PROFIBUS-DP
OCM-DPC1B-XXXX-XXXX-XXX
OCE-DPC1B-XXXX-XXXX-XXX
USER MANUAL
User Manual

ABSOLUTE ROTARY ENCODER
IXARC EXPLOSION PROOF PROFIBUS-DP
Page 2 Info Ex OCM/OCE Revision 26.05.2014
1General............................................................4
1.1 Absolute Rotary Encoder...............................4
1.2 Profibus technology.......................................4
2Installation ......................................................5
2.1 Settings in the connection cap.......................5
2.1.1 Station address .......................................5
2.1.2 Bus termination .......................................5
2.2 Connecting bus lines and power supply ........6
2.3 Connecting-up the connection cap with cable
glands..................................................................7
Use only EX d certified cable glands (or blind
plugs, if no cable is attached) which meet
EN/IEC 60079-1 requirements for attaching
cable to the encoder. Cable entry threads are
M20 x 1,5...............................................................7
Connecting the screen.........................................7
2.4 Instructions for mechanical installation and
electrical connection of the angular encoder .......7
3Device Configuration.....................................9
3.1 Overview –Configuration principle................9
3.2 Overview encoder configurations -
functionality........................................................10
3.3 Encoder configurations - data format...........11
4Class 1 and Class 2 profile..........................12
4.1 Parameter settings.......................................12
4.1.1 Code sequence.....................................13
4.1.2 Class 2 functionality ..............................13
4.1.3 Commissioning diagnostics...................13
4.1.4 Scaling function.....................................13
4.1.5 Measuring units per revolution ..............13
4.1.6 Total measuring range ..........................14
4.2 Data exchange in normal operation.............15
4.2.1 Transferring the process value..............15
4.2.2 Preset function ......................................15
5Special versions FRABA 2.1 and 2.2 ..........17
5.1 Parameter....................................................18
5.1.1 Activate manufacturer-specific
parameters .....................................................18
5.1.2 Desired measuring units........................18
5.1.3 Desired Measuring units reference........19
5.1.4 Activate commissioning mode ...............20
5.1.5 Shorter Diagnostics ...............................20
5.1.6 Software-limit switch..............................20
5.1.7 Physical impulses..................................21
5.1.8 Encoder type .........................................22
5.1.9 Velocity time base..................................22
5.2 Data exchange in normal operation .............23
5.3 Commissioning mode...................................24
5.3.1 Setting the counting direction ................24
5.3.2 Teach-In Start........................................25
5.3.3 Teach-In Stop........................................25
5.3.4 Preset value...........................................26
6Diagnostic messages...................................27
6.1 Overview......................................................27
6.2 Supported diagnostic messages..................28
6.2.1 Extended diagnostics header ................28
6.2.2 Memory error.........................................28
6.2.3 Operating status ....................................28
6.2.4 Encoder type .........................................28
6.2.5 Singleturn resolution..............................28
6.2.6 Number of revolutions............................28
6.2.7 Operating time warning..........................28
6.2.8 Profile version........................................28
6.2.9 Software version....................................28
6.2.10 Operating time.....................................28
6.2.11 Zero offset ...........................................29
6.2.12 Programmed resolution .......................29
6.2.13 Programmed total resolution................29
6.2.14 Serial number......................................29
7Configuring with STEP 7..............................30
7.1 Installing the GSD file...................................30
7.2 Configuring the encoder...............................31
7.3 Selecting the encoder version......................32
7.4 Setting the parameters.................................33
7.5 Further encoder configurations....................37

ABSOLUTE ROTARY ENCODER
IXARC EXPLOSION PROOF PROFIBUS-DP
Revision 26.05.2014 Info Ex OCM/OCE Page 3
7.5.1 Version FRABA 2.0 Multiturn.................37
7.5.2 Version FRABA 1.1 Multiturn.................37
7.5.3 Version FRABA 1.0 Multiturn.................37
7.5.4 Class 2 Multiturn ‚DX-Version’...............37
7.6 FAQ absolute encoder Profibus...................38
7.7 Definitions....................................................39
8Index..............................................................41
Imprint
FRABA B.V.
Gebouw A, Unit 27,
Jan Campertstraat 5,
6416 SG Heerlen
Netherlands
Telephone ++49/(0) 221/ 96213-0
Fax ++49/ (0) 221/ 96213-20
Internet http://www.posital.com
E-mail [email protected]
Copyright
The company Fraba B.V. claims copyright on this
documentation. It is not allowed to modify, to
extend, to hand over to a third party and/or to copy
this documentation without written approval by the
company FRABA B.V.
Specifications are subject to change without
notice
Technical specifications, which are described in
this manual, are subject to change due to our
permanent strive to improve our products.
Publication: Mai, 2014
Version: 1.2
Author: Wojciech Pająk
Certification -
-I M2 Ex db Mb OCM Mining
-II 2 G/D Ex db IIC T5 Gb
-II 2 G/D Ex tb IIIC T100°C Db IP 64/65/66/67
-Ambient temperatures - 40°C to 70°C
-
Certification Number OCM
TUV 13 ATEX 113112 X
IECEx TUN 12.0044X
Certification Number OCE
TUV 13 ATEX 113110X
IECEx TUN 12.0043X
-I EC 60079-0 Explosive atmospheres - Part 0:Equipment –General requirements
-IEC 60079-1 Explosive atmospheres - Part 1: Equipment protection by flameproof enclosures "d"
-IEC 60079-31 Electrical apparatus for use in the presence of combustible dust - Part 1: Protection by
enclosures "tD", IP6X
-IEC 60529-1991 +A1 Degree of protection provided by enclosure (IP Code)

ABSOLUTE ROTARY ENCODER
IXARC EXPLOSION PROOF PROFIBUS-DP
Page 4 Info Ex OCM/OCE Revision 26.05.2014
1 General
This manual describes installation and
configuration of the Absolute Rotary Encoder with
Profibus DP interface. The device meets the
requirements of a Profibus Slave according to the
PROFIBUS standard. It is certified by the “Profibus
Nutzerorganisation” in Germany.
1.1 Absolute Rotary Encoder
Basic principle of the absolute measurement is the
optical scanning of a transparent disk with code
print. The code disk is connected to the shaft that
is to be measured. By evaluating the code and two
additional incremental signals the absolute position
of the shaft can be determined with a resolution of
up to 65536 steps per revolution (16 bits).
So-called Multiturn-devices use reduction gears
and further code disks to determine the absolute
shaft position over up to 16384 revolutions (14
bits).
The position value is calculated in an integrated
microprocessor and transmitted over the Profibus.
Further information about the basic function
principle of Absolute Rotary Encoders and Profibus
networks can be found on our homepage
www.posital.com .
1.2 Profibus technology
PROFIBUS is an international, open, non-
proprietary fieldbus standard which is defined in
the international standards EN 50170 and EN
50254. There are three different versions: Profibus
DP, Profibus-FMS and Profibus-PA. FRABA
absolute encoders are designed for the DP
version. They support all usual baud rates up to 12
MBaud.
Besides manufacturer-specific functions, the
devices support the classes 1 and 2 according to
the Profile for Absolute Encoders (this device
profile can be ordered under part number 3.062
from the “Profibus Nutzeroganisation”). Further
information about profibus (functionality,
manufacturer, products), standards and device
profiles are available from the PNO:
Profibus Nutzerorganisation (PNO)
Haid-und-Neu-Straße 7
D-76131 Karlsruhe
Tel.:++49 (0) 721 / 96 58 590
Fax:++49 (0) 721 / 96 58 589
www.profibus.com

ABSOLUTE ROTARY ENCODER
IXARC EXPLOSION PROOF PROFIBUS-DP
Revision 26.05.2014 Info Ex OCM/OCE Page 5
2 Installation
The Absolute Encoder is connected with a
connection cap. This cap is connected to the
encoder with a 15-pin-D-Sub connector and can be
removed by loosening two screws on the backside
of the encoder. Bus lines and power supply are led
into the cap via cable glands and connected to
terminal blocks.
2.1 Settings in the connection cap
2.1.1 Station address
The station (node) address is set by using the
rotary switches in the cap. The values (x 10 or x 1)
for the switches are marked at the switch. Possible
addresses are between 0 and 99. Each address
can only be used once in the network. The station
address is read in when switching on the power
supply. An address change by the Master
(“Set_Slave_Add“) is not supported.
2.1.2 Bus termination
If the encoder is connected at the end or beginning
of the bus line the termination resistor must be
switched on (slide switch in position “ON”).
ON
R
ON
R
device X last device
Note
The outgoing bus line is disconnected if the
resistor is switched on!
The bus is only correctly terminated when the
encoder is connected to the connection cap. If the
encoder must be changed during operation, a
separate active bus termination should be used.

ABSOLUTE ROTARY ENCODER
IXARC EXPLOSION PROOF PROFIBUS-DP
Page 6 Info Ex OCM/OCE Revision 26.05.2014
2.2 Connecting bus lines and power supply
The power supply has to be connected once (no
matter which clamps). If the terminating resistor
is switched on, the outgoing bus lines are
disconnected.
Clamp
Description
B (left)
Bus line B (Bus in)
A (left)
Bus line A (Bus in)
−
0 V
+
10 –30 V
B (right)
Bus line B (Bus out)
A (right)
Bus line A (Bus out)
−
0 V
+
10 –30 V

ABSOLUTE ROTARY ENCODER
IXARC EXPLOSION PROOF PROFIBUS-DP
Revision 26.05.2014 Info Ex OCM/OCE Page 7
2.3 Connecting-up the connection cap
with cable glands
Use only EX d certified cable glands (or blind
plugs, if no cable is attached) which meet
EN/IEC 60079-1 requirements for attaching
cable to the encoder. Cable entry threads are
M20 x 1,5.
Use only shielded cable. Be aware of National
Wiring Standards for ATEX environments. For
ambient temperatures below -10o C and above
+60 C use field wiring suitable for minimum and
maximum ambient temperatures.
Installation requirments
Installation of the encoder must be completed
by a skilled technician or engineer. Failure to
comply with the instructions below will render
the ATEX/IECEx certifications INVALID. The
encoder may not be modified by the
customer.
Insure that power is off.
Connect to earth prior to proceeding. Observe
precautions for handling ESD (Electro Static
Discharge) sensitive devices.
Connecting the screen
To achieve the highest possible noise immunity
shielded cables should be used for data
transmission. The shield should be connected to
ground on both ends of the cable. In certain cases,
a compensation current might flow over the shield.
Therefore a potential compensation cable is
recommended.
2.4 Instructions for mechanical installation and electrical connection of the angular encoder
The following points should be observed:
Do not drop the angular encoder or subject it
to excessive vibration. The encoder is a
precision device.
Do not open the angular encoder housing
(this does not mean that you cannot remove
the connection cap). If the device is opened
and closed again, it can be damaged and dirt
may enter the unit.
The angular encoder shaft must be
connected to the shaft to be measured
through a suitable coupling (full shaft
version). This coupling is used to dampen
vibrations and imbalance on the encoder
shaft and to avoid inadmissible high forces.
Suitable couplings are available from FRABA.
Although FRABA absolute encoders are
rugged, when used in tough ambient
conditions, they should be protected against
damage using suitable protective measures.

ABSOLUTE ROTARY ENCODER
IXARC EXPLOSION PROOF PROFIBUS-DP
Page 8 Info Ex OCM/OCE Revision 26.05.2014
The encoder should not be used as handles
or steps.
Only qualified personnel may commission
and operate these devices. These are
personnel who are authorized to commission,
ground and tag devices, systems and circuits
according to the current state of safety
technology.
It is not permissible to make any electrical
changes to the encoder.
Route the connecting cable to the angular
encoder at a considerable distance or
completely separated from power cables with
their associated noise. Completely shielded
cables must be used for reliable data transfer
and good grounding must be provided.
Cabling, establishing and interrupting
electrical connections may only be carried-out
when the equipment is in a no-voltage
condition. Short-circuits, voltage spikes etc.
can result in erroneous functions and
uncontrolled statuses which can even include
severe personnel injury and material damage.
Before powering-up the system, check all of
the electrical connections. Connections,
which are not correct, can cause the system
to function incorrectly. Fault connections can
result in severe personnel injury and material
damage.

ABSOLUTE ROTARY ENCODER
IXARC EXPLOSION PROOF PROFIBUS-DP
Revision 26.05.2014 Info Ex OCM/OCE Page 9
3 Device Configuration
The Absolute Encoder with Profibus-Interface can
be programmed according to the needs of the
user. The GSD-file has to be installed in the used
software tool. The user has the possibility to
choose different encoder configurations.
Parameters and functionality depend on the
selected encoder configuration. FRABA-Absolute
Encoders Type „OCD-DPC1B-XXXX-XXXX-0CC“
support all configurations described in the
following, i.e. there is no functionality limitation due
to the hardware. Additionally to the configurations
„Class 1“ and „Class 2” (according to the Profile for
Encoders) the FRABA Encoder offers
configurations with manufacturer-specific functions.
By choosing a certain encoder configuration
parameter and configuration data are determined.
These data are stored in the profibus master. They
are transmitted to the slave (encoder) when the
profibus network is starting up („DDLM_Set_Prm“).
It is not possible to change parameters or
configuration during the normal operation of the
device (exception: “Commissioning Mode”, see
chapter 5.3).
After receiving configuration and parameter data
the absolute encoder enters the normal operating
mode (cyclic data transmission –
„DDLM_Data_Exchange“). In this mode the
process values (e.g. the position value) are
transmitted. Data length and format are
determined by the user when selecting a certain
encoder configuration.
3.1 Overview –Configuration principle
GSD-File
Software Tool database
PLC
Choice of encoder configuration
Parameter settings
Parameter („DDLM_Set_Prm“)
Once at Start-Up
Cyclic Data Transmission
(e.g. position value)

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IXARC EXPLOSION PROOF PROFIBUS-DP
Page 10 Info Ex OCM/OCE Revision 26.05.2014
3.2 Overview encoder configurations - functionality
Designation
Cyclic communication
Programmable
parameters
Additional functions
Class 1
Singleturn
Position value - 16 bit Input
Code sequence
-
Class 1
Multiturn
Position value - 32 bit Input
Code sequence
-
Class 2
Singleturn
Position value - 16 bit Input
Preset value - 16 bit Output
Code sequence
Scaling factor
Preset function
Class 2
Multiturn
Position value - 32 bit Input
Preset value - 32 bit Output
Code sequence
Scaling factor
Preset function
FRABA 2.1
Singleturn
Position value (32 bit Input)
Preset value / Teach-In
(32 bit Output)
Code sequence
Scaling factor
Shorter Diagnostics
Limit switches
Preset function
Commissioning mode
FRABA 2.1
Multiturn
Position value (32 bit Input)
Preset value / Teach-In
(32 bit Output)
Code sequence
Scaling factor
Shorter Diagnostics
Limit switches
Preset function
Commissioning mode
FRABA 2.2
Singleturn
Position value (32 bit Input)
Preset value / Teach-In
(32 bit Output)
Velocity
(16 bit Input)
- Code sequence
- Scaling factor
- Shorter Diagnostics
- Limit switches
- Velocity time base
Preset function
Commissioning mode
Velocity Output
FRABA 2.2
Multiturn
Position value (32 bit Input)
Preset value / Teach-In
(32 bit Output)
Velocity
(16 bit Input)
- Code sequence
- Scaling factor
- Shorter Diagnostics
- Limit switches
- Velocity time base
Preset function
Commissioning mode
Velocity Output