Using Control Setpoints - Satec expertmeter EM720 Operation Manual

Chapter 5 Configuring the EM720

Using Control Setpoints

OR/AND
Input group
Trigger
parameter
Relation
88
The EM720 has an embedded logical controller that runs
different actions in response to user-defined internal and
external events. Unlike a PLC, the EM720 uses a simplified
programming technique based on setpoints that allows the
user to define a logical expression based on measured analog
and digital values that produces a required action.
The EM720 provides 16 control setpoints with programmable
operate and release delays. Each setpoint evaluates a logical
expression with up to four arguments using OR/AND logic.
Whenever an expression is evaluated as "true", the setpoint
performs up to four concurrent actions that can send a
command to the output relays, increment or decrement a
counter, or trigger a recorder.
To program the setpoints, select General Setup from the
Meter Setup menu, and then click on the Control/Alarm
Setpoints tab.
The available setpoint options are described in the following
table:
Option Format/Range
OR, AND
<=, >=, =, ON,
OFF
Description
Setpoint Triggers
The logical operator for the trigger
The trigger parameter group (see Appendix A)
The trigger parameter that is used as an argument
in the logical expression (see Appendix A)
The relational operator used in the conditional
expression for the trigger
EM720 Power Quality and Revenue Meter
General Meter Setup