West Control Solutions Pro-EC44 - Manual (Page 62)

Pro-EC44 2-Loop Graphical Profile Controller & Recorder
Pro-EC44 Product Manual - 59540-1 October 2013 Page 55
Power Output remote setpoint input is lost. Adjustable from 0 to 100% for single control or
-100 to +100% for dual control. The default value is OFF (0% power). Does
not apply if control is disabled or in manual mode.
Caution: Ensure the value set will maintain safe process conditions.
Motor Travel Time The motor travel time (valve movement time from fully open to fully closed
in mm:ss). Adjustable from 5s to 5 mins - In VMD Control Mode only.
Minimum Motor On
Time The minimum drive effort (in seconds) to begin moving the motorised valve
in VMD Control Mode. Adjustable from 0.02 to of the Motor Travel Time.
Slave SP Scale Min The effective cascade slave setpoint value equating to 0% power demand
from the master controller - Limited by the slave input scaling.
Caution: Set to safe values for the process!
Slave SP Scale Max The effective cascade slave setpoint value equating to 100% power
demand from the master controller - Limited by the slave input scaling.
Caution: Set to safe values for the process!
Valve Sensor Break
Action The direction to drive the valve if the process input signal or an active
remote setpoint input is lost. The default action is to drive the valve closed.
– Applies to VMD Control Mode only. Does not apply if control is disabled
or in manual mode.
Caution: Set to safe values for the process!
Setpoint Lower Limit The minimum allowable setpoint value. Adjustable within the scaled input
limits, but cannot be above the setpoint upper limit. Applies to local, remote
and profile setpoints.
Caution: Set to safe values for the process. Operators can adjust
local setpoints to any value between the limits set.
Setpoint Upper Limit The maximum allowable setpoint value. Adjustable within the scaled input
limits, but cannot be below the setpoint lower limit. Applies to local, remote
and profile setpoints.
Caution: Set to safe values for the process. Operators can adjust
local setpoints to any value between the limits set.
Setpoint Ramp Rate Setpoint Ramp Rate value, adjustable from 1 to 9999 display units per
hour, or OFF. The ramp is applied at power-up (from current PV to SP) and
whenever the setpoint value or source is changed. If set to OFF, the
setpoint steps immediately to the new setpoint value.
Main Setpoint Source Select the source of the main setpoint. This can only be a “Local” setpoint
set from the keypad, or Not used.
Alternate Setpoint
Source Select the source of the alternate setpoint. This can be a “Local” setpoint,
not used, or an analogue remote setpoint signal applied to input 2 or
auxiliary input A
– depending on available hardware.
Main Setpoint Value Sets the current value of the main setpoint between the setpoint upper and
lower limits.
Alternate Setpoint
Value Sets the current value of the alternate setpoint between the setpoint upper
and lower limits.
Select Active
Setpoint
Select if the main or alternate setpoint is to be the “active” setpoint for this
loop.
Main Setpoint Offset An offset that can be added to the main setpoint (+ve values) or subtracted
from it (-ve values) when the instrument is a comms slave in a multi-zone
application. This changes the effective setpoint used for control.
Caution: It should be set to zero if an offset is not required.
Alternate Setpoint
Offset An offset that can be added to the alternate setpoint (+ve values) or
subtracted from it (-ve values) when the instrument is a comms slave in a
multi-zone application. This changes the effective setpoint used for control.
Caution: It should be set to zero if an offset is not required.