West Control Solutions Pro-EC44 - Manual (Page 46)

Pro-EC44 2-Loop Graphical Profile Controller & Recorder
Pro-EC44 Product Manual - 59540-1 October 2013 Page 39
 Two Control Loops: Profiler Status
LED Indicators LED Function Labels
Engineering Units*
Profile Status Indicators*:
► Run,
▌▌ Held,
■
Stopped
Process Variable Values &
Setpoints*
Loop Descriptions*
Profile Name & Progress
Segment No. Type & Progress
(or Delayed Start Time)
* = in loop 1 & 2 screen area 2-LOOP PROFILE STATUS
Default LED indicator functions are as shown in the initial base screen.
In manual mode the effective setpoints are replaced by the %Manual Power
and the label “MAN”.
In manual mode with valve motor drive the setpoints are replaced by valve Open / Stop / Close.
Note: If power is lost when a profile is running and recovery is set to continue,
the bar-graph re-starts from the beginning but the overall time remains correct.
Event Status Lists all configured profile events with their current status (Active or Inactive) –
Shown only when the instrument is in profiler mode.
Cascade Mode Allows the user to open the cascade, breaking the master-slave link for
commissioning & tuning.
CAUTION: Return to Cascade-CLOSE when finished!
◘ only shown if set to do so in Display Configuration
.
Auto/Manual Control
Selection
– Loop 1
(or Cascade Slave)
Switches loop 1 (or the cascade slave loop) 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.
If Manual control is selected when in Cascade mode, the slave loops % power
value shown. This is the power output fed directly to the control actuator (e.g.
power to the heater elements).
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 until automatic
control is reselected.
Setpoint Value
Display &
Adjustment
– Loop 1
View and adjust the main and alternate setpoints for loop 1 (or the master
loop in cascade mode). 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.