Chapter 5 Configuring the PM135
General Meter Setup
92
PM135 Powermeter Series
Using Setpoint Events and Actions
When a setpoint status changes, i.e., a setpoint event is either asserted or
de-asserted, the following happens in your meter:
The new setpoint status is logged to the setpoint status register
that can be monitored through communications from the SCADA
system or from a programmable controller in order to give an
indication on the expected event.
The operated setpoint status is latched to the setpoint alarm latch
register that can be inspected through communications and via
the display (see
Status Display
in Chapter 3). The register holds
the last setpoint alarm status until it is explicitly cleared through
communications or via the display.
A programmable action is performed on setpoint status transition
when a setpoint event is asserted.
Generally, setpoint actions are performed independently for each setpoint
and can be repeated a number of times for the same target. The
exceptions are relay operations that are shared for each target relay
between all setpoints using an OR scheme.
A relay output is operated when one of the setpoints linked to the relay is
activated and remains operated until all of these setpoints are released
(except for latched relays that require a separate release command to be
deactivated).
Using Time Counters
Any of the general counters can be used to count the setpoint operation
time. If you select the
TIME CNT n
action for a setpoint, the target
counter measures the time while the setpoint is in the operated state. The
counter resolution is 0.1 hour. See
Status Display
in Chapter 3 on how to
examine the counters via the front display.
