Input and Output Signals
Publication PUB091-003-00_0119
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Status Feedback
IQ / IQT actuator
SI / EH actuator
ROMpak / Q actuator
Thermostat Tripped
Monitor Relay
Valve Obstructed
Valve Jammed
Valve Moving by
Hand
Moving Inhibited
Position Control
Enabled
Watchdog Recovery
Battery Low
Open Interlock input
Close Interlock input
DI –1
DI –2
DI –3
DI –4
Slow Mode
Note:
– This bit is reported when within the slow mode band, but does not affect the actuator.
- a torque alarm when motor fails to turn after thermostat trips.
-
this will show up as a general fault on the SI actuator.
- these will show up as either over pressure or stall on the SI actuator.
5.2.1
Digital Inputs from All Actuator Types
Actuator Moving
Whenever the actuator position is changing due to the motor running
or in the case of the IQ or IQT if the output drive is moving, this bit will
be set true (1).
Close Limit
This data bit indicates that the actuator has reached the closed
position. The limit switch should be set slightly within the actual valve
stroke to allow for torque seating or overshoot on closing without
damaging the valve. The data bit will remain true (1) even if the
position is passed through or exceeded.
Open Limit
This data bit indicates that the actuator has reached the open position.
The limit switch should be set slightly within the actual valve stroke to
allow for torque seating or overshoot on opening without damaging
the valve. The data bit will remain true (1) even if the position is
passed through or exceeded.
Running Closed
Whenever the actuator motor contactor used to drive the actuator in
the closing direction is energised this bit will be true (1).
