Controls - rotork Mk3 Technical Manual

Foundation Fieldbus CP Option Card Technical Manual
5.1

Controls

The FF CP card can be used to control the actuator and position the valve. The valve may be moved
fully closed, fully open or to an intermediate position. Additionally, the actuator can make the valve
adopt an Emergency Shut Down position and in some actuators perform a partial stroke test. Most
actuator types can be prevented from moving by the presence of an Interlocking signal from another
device on the plant. The actuator may also be operated from its local controls or by hard-wired direct
contact inputs. Note that to do this the Auxiliary Mask must be correctly set.
As well as controlling the actuator the FF CP can also be used to operate 4 discrete output relays
when the actuator is fitted with a relay card, assuming the DO block itself isn't in IMAN, LO or OOS.
The control commands have three potential sources:

Foundation Fieldbus generated commands

Actuator Local Controls

Direct Hard-wired input controls
The full list of commands is shown in the table. The actuator types show whether the command is
applicable to that actuator type.
Command
Foundation Network
Open
Close
Stop
Emergency Shut Down
Analogue Position Demand
Partial Stroke
Relay 1 output
Relay 2 output
Relay 3 output
Relay 4 output
Local Actuator Controls
Open
Close
Stop
Direct Hard-Wired Inputs
Open
Close
Stop/Maintain
Emergency Shut Down / Net disable
Open Interlock (active prevents opening)
Close Interlock (active prevents closing)
Note:  – Requires an extra relay board to be fitted.
Fig 5.2: Available command options
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IQ3, IQT3
& SI
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Publication PUB089-005-00_0618
CVA & CK
CMA
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