rotork Modbus - Page 26

Modbus MFU Option Card Installation Manual
26 of 64 Publication PUB091-004-00_0918
The control commands have three potential sources:
 Modbus RS-485 network generated commands
 Actuator Local Controls
 Direct contact input controls
The full list of commands is shown in the next table.
Command
IQ3
SI₃
CVA
CMA
K-Range
Modbus over the network
Open
✓
✓
✓
✓
✓
Close
✓
✓
✓
✓
✓
Stop
✓
✓
✓
✓
✓
Emergency Shut Down
✓
✓
✓
✓
✓
Relay output DO-1
✓
✓



Relay output DO-2
✓
✓



Relay output DO-3
✓
✓



Relay output DO-4
✓
✓



Analogue Position Demand
✓
✓
✓
✓
✓
Partial Stroke Test
✓
✓



Local Controls
Open
✓
✓


✓
Close
✓
✓


✓
Stop
✓
✓
✓

✓
Direct Hard Wired Inputs
Open
✓
✓


✓
Close
✓
✓


✓
Stop/Maintain
✓
✓


✓
Emergency Shut Down
✓
✓


✓
Open Interlock (active prevents opening)
✓



✓
Close Interlock (active prevents closing)
✓



✓
Note:  – Requires Digital Input / Output card or Extra Relay card to be fitted
 – Requires a DSM or MSM with the optional potentiometer.
The Modbus network commands for Open, Close and Stop will operate the actuator provided:-
• Local/Local Stop/Remote selector is in ‘Remote’,
• Modbus commands are not inhibited by the ‘Inhibit/DI-4’ input parameter setting and DI-4
condition,
• No interlock is active,
• There is no standing hard wired control input active, except for Stop/Maintain,
• No alarm condition prevents it from moving,