Discrete Input Status Feedback - rotork Mk3 Technical Manual

5.2

Discrete Input status feedback

The FF CP card has DI (Discrete Input) function blocks that may be used to report the valve and
actuator status over the network. The conventional contact indications are also available from the
actuator limit switches and indication contacts.
Each DI block output has a value between 0 and 255. If the host DCS system uses its 'Boolean Fan
Out' function, the returned value may be decoded into 8 individual bits, where each bit represents a
single piece of feedback data. If the DCS does not have this facility, then the state of the first bit in
each DI will be represented by 0 = not true and 1 = true. The complete list of DIs and the function of
the individual bits is indicated in section 5.2.1. The table below indicates which signals are available
from each actuator type.
DI Function:
Block Number/Bit Number
1 / 0 2 / 1
1 / 1 2 / 0
1 / 2
1 / 3 2 / 3
1 / 4 2 / 2
1 / 5 3 / 0
1 / 6 3 / 1
1 / 7 3 / 2
2 / 4
2 / 5
2 / 6
2 / 7
3 / 3
3 / 4
3 / 5
3 / 6
3 / 7
Notes over page:

- This bit is reported when within the slow mode band, but does not affect the actuator. Slow mode
is not an option in some of the actuators.

- This bit indicates the state of the Hardwired Partial stroke input
Status Feedback
Close Limit
Open Limit
5 / 0 Actuator Moving
Running Closed
Running Open
Remote selected
Local Stop selected
Local selected
Not in Remote
4 / 0 General Alarm
Valve Obstructed
Valve Jammed
Moving Inhibited
5 / 5 Open Interlock active input
5 / 6 Close Interlock active input
Position Control Enabled
Slow Mode
4 /1 Thermostat Tripped
4 / 2 Monitor Relay
4 / 3 Valve Obstructed/Jammed
4 / 4 Part Stroke Error
4 / 5 Valve Moving by Hand
4 / 6 Battery Low
4 /7 Watchdog Recovery
5 / 1 Hard-Wired HW_DI–1
Hard-Wired HW_DI –2
5 / 2
Hard-Wired HW_DI –3
5 / 3
Hard-Wired HW_DI –4
5 / 4
5 / 7 Partial Stroke in Progress
Publication PUB089-005-00_0618
Actuator Input Output Signals
IQ3, CVA CK
IQT3 &
& SI CMA
3
✓ ✓ ✓
✓ ✓ ✓
✓ ✓ ✓
✓ ✓ ✓
✓ ✓ ✓
✓ ✓ ✓
✓ ✓ ✓
✓ ✓ ✓
✓ ✓ ✓
✓ ✓ ✓
✓ ✓ ✓
✓ ✓ ✓
✓ ✓ ✓
✓ ✓ ✓
✓ ✓ ✓
✓ ✓ ✓
✓ ✓ ✓
✓ ✓ ✓
✓ ✓ ✓
✓ ✓ ✓
✓
N/A N/A
✓ ✓ ✓
✓
N/A N/A
✓
N/A N/A
✓
N/A N/A
✓
N/A N/A
✓ ✓ ✓

K
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
N/A
✓
N/A
N/A
N/A
N/A
✓
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