SATEC PM180 Operation Manual - Manual (Page 81)

‎Chapter 7 Programming the PM180 Using Control Setpoints
PM180 Substation Automation Unit 79
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,
data logging and waveform logging that are shared between all setpoints using an
OR scheme for each separate target.
A relay output is operated when one of the setpoints linked to the relay is activated
and stays in the operated state until all of these setpoints are released (except for
latched relays that require a separate release command to be deactivated).
Data logging and waveform logging directed to the same file are done once for the
first setpoint among those that specify the same action, guaranteeing that there will
not be repeated records related to the same time.
Recording Setpoint Events
Time-tagged setpoint events can be recorded both to the Event log, and to the
Sequence-of-Events log files if you put corresponding actions into the setpoint action
list.
If you link a setpoint to the Sequence-of-Events recorder, all setpoint transition
events are recorded to the Sequence-of-Events log by default. If you select to record
setpoint operations into the Event log, define in the action target box which transition
events you want to be recorded: when the setpoint is operated, when it is released,
or both events. The Event recorder puts into a log file a separate record for each
active trigger caused a setpoint status transition, and a separate record for each
action done on the setpoint activation (except for logging actions that are not
recorded to the Event log).
If you run a number of recorders from the same setpoint action list, it is
recommended that you put the Event log action before others in order to allow other
recorders to use the event sequence number given to the event by the Event
recorder.
Cross Triggering Setpoints
When a setpoint is operated, the device sends a broadcast UDP message across the
network using one of the sixteen triggering channels. All devices that have a setpoint
programmed to respond to this trigger act in response. The cross triggering delay is
normally less than one cycle time.
To send a cross triggering message, put an “EXT TRIGGER” action into the setpoint
actions list and select one of the sixteen triggering channels as a target. In all
devices, which you want to respond to this message, select an “EXT TRIGGER”
group in the setpoint triggers list and specify the channel through which the device
would receive messages.