SATEC PM180 Operation Manual - Manual (Page 77)

‎Chapter 7 Programming the PM180 Using Periodic Timers
PM180 Substation Automation Unit 75
Using Periodic Timers
The PM180 has 16 programmable timers that are used for periodic recording and
triggering operations on a time basis through the Control Setpoints. When a pre-
programmed timer interval is expired, the timer generates an internal event that can
trigger any setpoint (see
Using Control Setpoints ). The programmable time interval
can be from 1/2 cycle and up to 24 hours.
To configure the device timers, select General Setup from the Meter Setup menu,
and then click on the Periodic Timers tab.
The available options are described in the following table:
Option Range Default Description
Period 0 = disabled
0.010 - 100,000.000 sec
0.500 - 100,000.000 cycles
0 The timer period
Units Seconds,
Cycles
Seconds The time units
Seven timers from Timer #10 through Timer #16 are factory preset and cannot be re-
programmed. They are primarily intended for the use with the Power Quality and
Fault recorders. Other timers can be programmed by the user.
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 PM180 has an embedded logical controller that runs different actions in
response to user-defined internal and external events. Unlike a PLC, the PM180
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 PM180 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.