West Control Solutions Pro-EC44 - Manual (Page 47)

Pro-EC44 2-Loop Graphical Profile Controller & Recorder
Pro-EC44 Product Manual - 59540-1 October 2013 Page 40
Setpoint Ramp Rate
– Loop 1
The setpoint ramp rate adjustment for loop 1. Adjustable between 0.1 and
9999.0 display units per hour.
When set to “OFF”, setpoint changes will step
immediately to the new value - ◘ only shown if set to do so in Display.
Note: If the setpoint ramp feature is used, it disables pre-tune
completely, and if self-tune is used, it will only calculate new
terms after the ramp has completed and the setpoint is constant.
Select Active
Setpoint
– Loop 1
Select if the main or alternate setpoint is to be the “active” setpoint for loop 1
(or the master loop in cascade mode). ◘ only shown if set to do so in Display.
Control Enable
– Loop 1
Enables or disables loop 1 control outputs. When disabled, the primary and
secondary control outputs of loop 1 are set to zero 0% (unless manual mode
has been selected) and the
setpoint value is replaced by “OFF”.
◘ only shown if set to do so in Display.
CAUTION: The instrument cannot control the process when disabled.
Auto/Manual Control
Selection
– Loop 2
Switches loop 2 between automatic and manual control modes.
Switching between these modes uses “Bumpless Transfer”.
◘ only shown if set to do so in Display Configuration
.
When using standard PID control, Manual mode replaces the Setpoint
display with a -100 to 100% power output level value
, labelled “Man”.
The D or U keys are used to adjust the manual power value.
When using VMD control, Manual mode replaces the Setpoint display with the
valve movement status (Opening, Closing or Stopped),
labelled “Man”.
The D key opens the valve and the U key closes the valve.
CAUTION: Manual mode overrides the automatic control loop. It also
ignores any output power limits, valve open/close limits and the control
enable/disable setting. The operator is responsible for maintaining the
process within safe limits.
Note: In manual mode a running profile will hold if it is controlling
the setpoint of loop 2, until automatic control is reselected.
Setpoint Value
Display &
Adjustment
– Loop 2
View and adjust the main and alternate setpoints for loop 2. The setpoints can
be set to any value within the setpoint limits set in Control Configuration. View
and adjust local (internal) setpoints for the loop. The currently selected
setpoint is marked as “active”.
If the alternate setpoint is remote it cannot be adjusted from the keypad.
Setpoint Ramp Rate
– Loop 2
The setpoint ramp rate adjustment for loop 2. Adjustable between 0.1 and
9999.0 display units per hour.
When set to “OFF”, setpoint changes will step
immediately to the new value -
◘ only shown if set to do so in Display.
Note: If the setpoint ramp feature is used, it disables pre-tune
completely, and if self-tune is used, it will only calculate new
terms after the ramp has completed and the setpoint is constant.
Select Active
Setpoint
– Loop 2
Select if the main or alternate setpoint is to be the “active” setpoint for loop 2
(or the master loop in cascade mode).
◘ only shown if set to do so in Display.
Control Enable
– Loop 2
Enables or disables loop 2 control outputs. When disabled, the primary and
secondary control outputs of loop 2 are set to zero 0% (unless manual mode
has been selected) and t
he setpoint value is replaced by “OFF”.
◘ only shown if set to do so in Display Configuration.
CAUTION: The instrument cannot control the process when disabled.
Alarm Status Lists the status of the alarms. Shown if any of the 7 alarms is active.
The titles
“Alarm n” can be replaced with the PC configuration software to a
user defined 8 character name for each alarm.