WESTLOCK CONTROLS CORPORATION
280 N. MIDLAND AVE., STE. 258, SADDLE BROOK, NJ 07663 TEL: 201-794-7650 FAX: 201-794-0913
www.westlockcontrols.com
10/5/2013
TECH-477/D.W.O. 21424
Page 176 of 206
Channel Input: Reference to the active Transducer Block and its
parameter which provides the actual position of the
final control element. More description, see General
Requirements (CHANNEL).
Channel Output: Reference to the active Transducer Block and its
parameter which provides the positioning value for
the final control element. More description, see
General Requirements (CHANNEL).
Fail Safe
Fail Safe Time: Time in seconds from detection of failure in output
block up to the output action of the block output if
the condition still exists.
Fail Safe Mode: Defines reaction of device if communication fault is
still detected after fail safe time.
Fail Safe Default Value: Default value for the setpoint input if communication
fault is detected.
RCAS_OUT
RCAS OUT: Function Block Setpoint, Provided to a supervisory
Host for monitoring / back calculation and to allow
action to be taken under limit conditions or mode
change (RCAS mode).
Status (RCAS OUT): Contains the following status of quality: Good
(Cascade), Good, Uncertain and Bad.
POS_D
Valve Position: Enumeration to indicate current position of the
valve.
Status (Valve Position): Status information of the current position of the
valve.
SETP_DEVIATION
Setpoint Deviation: Difference between Setpoint and Readback in %
travel span (span between OPEN and CLOSED
position).
Check Back
