Advertisement
Using Alarm/Control Setpoints
Multi-Mon has an embedded logical controller that runs different actions in response to user-defined internal and external events.
Unlike a PLC, the Multi-Mon uses a simplified programming technique based on setpoints that allows the user to program a
required action based on a measured analog value or on a time. The controller provides up to 4 setpoints for each submeter.
This setup allows configuring setpoints for each individual submeter. It can be read and changed via the corresponding
submeter's address.
To program the setpoints for a submeter, select General Setup from the Meter Setup menu, and then click on the Control/Alarm
Setpoints tab.
The following table describes the setpoint options.
Option
Trigger parameter
See Appendix D The trigger parameter that is used as an argument in the logical expression
Operate limit
Release limit
Operate delay
0.1-999.9 sec
Release delay
0.1-999.9 sec
Action
See Appendix D
Using Numeric Triggers
For numeric (analog) triggers, a setpoint allows you to specify two thresholds for each trigger to provide hysteresis (dead band)
for setpoint operations. The operate limit defines the operating threshold, and the second release limit defines the release
threshold for the trigger. If you do not want to use
hysteresis for the trigger, set the release limit to the same as the operate limit.
Range
The threshold (in primary units) at which the conditional expression would be evaluated to true. Not
applicable for time triggers.
The threshold (in primary units) at which the conditional expression would be evaluated to false. Defines
the hysteresis for analog triggers. Not applicable for digital triggers.
The time delay before operation when the operate conditions are fulfilled
The time delay before release when the release conditions are fulfilled
The action performed when the setpoint expression is evaluated to true (the setpoint is in operated
state)
Fig. 31.
Description
35
MULTI-MON
31-00035—01
Advertisement
