SATEC SA300 ezPAC Operation Manual - Manual (Page 78)

Chapter 7 Programming the SA300 Using Control Setpoints
78 SA300 Substation Automation Unit
To run a periodic timer, select the desired time unit and specify a non-zero time
period.
To stop a timer, set the time period to zero.
Using Control Setpoints
The SA300 has an embedded logical controller that runs different actions in response
to user-defined internal and external events. Unlike a PLC, the SA300 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 SA300 provides 32 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 Description
Setpoint Triggers
OR/AND OR, AND The logical operator for the trigger
Input group The trigger parameter group (see Appendix C)
Trigger parameter The trigger parameter that is used as an argument in
the logical expression (see Appendix C)
Relation <=, >=, =, ON,
OFF, NEW, Delta The relational operator used in the conditional
expression for the trigger
Operate limit The threshold (in primary units) at which the
conditional expression would be evaluated to true.
Not applicable for digital triggers.