rotork Modbus, Technical Manual

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Modbus MFU Option Card Installation Manual
36 of 64 Publication PUB091-004-00_0918
actuator fails to complete the partial stroke within the time set then this
bit will be true (1).
Once set, the Part Stroke Error bit will be reset to 0 when the actuator
next completes a successful partial stroke test. (About 15 seconds
after the actuator stops moving).

General Alarm General Alarm is any of the following: battery low/flat, valve
alarm, actuator alarm, control alarm, valve jammed/obstructed, or monitor relay.
5.3 Actuator Analogue Input Feedback
The Modbus Module makes available over the network a number of analogue variables. These
contain information about the valve and actuator.
Analogue Feedback IQ3 SI
₃
CVA CMA K-Range
Actuator Instantaneous Torque
✓
✓
②
✓
①
✓ 
Valve Position
✓ ✓ ✓ ✓ ✓
Note ① 
Torque on CVA. Thrust on CVL
Note ②
Pressure

Torque The currently developed torque value is reported as an Integer Value
in the range 0 to 120 (0-78 hex), representing the percentage of
actuator rated torque generated.

Valve Position The current valve position is reported as an Integer Value in the range
0 to 1000 (0
– 3E8 hex) representing the percentage position to 0.1%
resolution.
The actuator automatically scales the valve position value reported
from the setting of the limit switches.
If Limited Range Positioning is invoked by setting the appropriate
parameters (8 & 9), then the reported valve position 0 to 100% follows
the limited range of valve travel.
5.4 IQ3 Data Logger Information
The Modbus Module also makes available some of the data logged information from registers in the
database. The data available is updated when the actuator reaches the end of travel and stops
moving, provided the actuator
selector is in the ‘Remote’ position.

Close Torque Set The actuator setting for the maximum generated torque value
permitted when the actuator is moving towards the closed position is
recorded in this register.

Open Torque Set The actuator setting for the maximum generated torque value
permitted when the actuator is moving towards the open position is
recorded in this register.