rotork Mk3 - Actuator Analogue Input Feedback

Actuator Input Output Signals
Publication PUB089-005-00_0618 41 of 116
5.3 Actuator Analogue Input feedback
The FF CP card includes two Analogue Input blocks, AI 1 and AI 2, which are used to report
information about the valve and actuator. These blocks are connected to the Transducer block in the
default configuration.
Function Block
No
Analogue Feedback
IQ3,
IQT3
& SI
3
CVA
&
CMA
CK
K
AI 1
Valve Position
✓
✓
✓
✓
AI 2
Actuator Instantaneous
Torque/Thrust
✓
✓
✓
N/A
 Valve Position The current valve position is reported as an Integer Value in the range
0.0 to 100.0% in block AI 1.
The actuators automatically scale the valve position value reported
from the setting of the limit switches. This scaling is retained in
EEPROM when the actuator power is removed.
If Limited Range Positioning is invoked by setting the appropriate
parameters, then the reported valve position 0.0 to 100.0% follows the
limited range of valve travel.
 Torque The currently developed torque value is reported in block AI 2 in the
range 0 to 120% representing the percentage of actuator rated torque
generated.