Supplement operating manual for DREHMO i-Matic actuators with integrated
MODBUS fieldbus interface
Wenden, 21.03.12
Page 2 of 18
Prepared by: Ste
Table of contents
1
Introduction ................................................................................................. 3
2
Interface technology ................................................................................... 3
2.1
Physical interface .................................................................................................... 3
2.2
Supported function codes ...................................................................................... 4
2.3
Data model ............................................................................................................... 4
2.3.1
Accesses for master input data ( actuator feedback signals) ................................................. 5
2.3.2
Accesses for master output data ( actuator command signals) .............................................. 8
2.4
Parameterisation ................................................................................................... 10
2.4.1
Communication settings – addresses, baud rate, parity ........................................................ 10
2.4.2
Number of channels – bus profile ............................................................................................. 10
2.4.3
Redundancy modes – line redundant vs. master redundant ................................................. 10
2.4.4
Function Fail-Safe – Timeout setting ........................................................................................ 10
2.4.5
Fault messages ........................................................................................................................... 11
2.5
Electrical connection ............................................................................................ 12
2.5.1
Actuators i-Matic for normal operation – DiM-X0X .................................................................. 12
2.5.1.1
Compact plug assembly ........................................................................................................ 12
2.5.1.2
Bus termination ...................................................................................................................... 14
2.5.1.3
Grounding of the cables´ shields in case of copper cable use .............................................. 14
2.5.1.4
Interface with fibre optic connection ...................................................................................... 15
2.5.2
Actuator i-Matic for Ex-Zone acc. ATEX device category 2 G – DiM-X1X ............................. 16
2.5.2.1
Connection with copper cable ............................................................................................... 16
2.5.2.2
Connection with fibre optic cable ........................................................................................... 17
2.5.2.2.1
Setting of transmission power ........................................................................................... 17
2.6
Interface to external sensor - process inputs ..................................................... 18
