rotork Mk3 - Page 39

Actuator Input Output Signals
Publication PUB089-005-00_0618 39 of 116
 Valve Obstructed/Jammed
This bit is a combination of the Valve Obstructed and the Valve
Jammed bits. If either is true this bit will be true (1).
 Valve Moving by Hand
The manual movement of the valve is reported as true (1) if the
actuator is moved by the handwheel away from the last position. The
percentage of travel required to trip the indication is set in the
associated parameter in the Transducer block during set-up.
The bit will remain true (1) until the actuator is moved electrically by
either the local controls or a network command.
 Digital Input HW_DI-1
This bit reports the status of the contact connected to the actuator
hard-wired Open terminals. The input can be used to control the
actuator or simply to report the status of a plant feedback signal. The
function is set in the Auxiliary Input Mask parameter, which
determines whether the bit is reported as true (1) for a closed contact
or an open contact and whether the input controls the actuator or not.
Note that the input is always reported even when it is also controlling
the actuator.
 Digital Input HW_DI-2
This bit reports the status of the contact connected to the actuator
hard-wired Close terminals. The input can be used to control the
actuator or simply to report the status of a plant feedback signal. The
function is set in the Auxiliary Input Mask parameter, which
determines whether the bit is reported as true (1) for a closed contact
or an open contact and whether the input controls the actuator or not.
Note that the input is always reported even when it is also controlling
the actuator.
 Digital Input HW_DI-3
This bit reports the status of the contact connected to the actuator
hard-wired Stop/Maintain terminals. The input can be used to control
the actuator or simply to report the status of a plant feedback signal.
The function is set in the Auxiliary Input Mask parameter, which
determines whether the bit is reported as true (1) for a closed contact
or an open contact and whether the input controls the actuator or not.
Note that the input is always reported even when it is also controlling
the actuator.