4.17 Setpoint Operation
4.17.1 General
The event processing capabilities of the PM295 enable the handling of user-defined
actions on programmable internal and external events. The setpoint system managed
by the event processor module provides easy and flexible programming for different
applications. Some of the PM295 functions can be performed only via the event
processor. Those include control over relay outputs, disturbance monitoring, and on-
board data recording.
The event processor operations are programmed by the user. When programming a
setpoint, the user should specify a list of event conditions that trigger setpoint
operation, and a list of actions the user wants to run whenever event conditions are
fulfilled.
The event conditions can be combined by logical operations, so that a setpoint might
be operated, for example, when at least one of conditions is realized, or all of the
setpoint conditions should be fulfilled to make a decision concerning the setpoint
operation.
The event processor can provide a one-shot action on operating the setpoint, as well
as periodical actions using one of the four interval timers to trigger the setpoint. In
the last case, periodical actions can be gated by any other conditions, or manually
via communications. The setpoint actions provide extensive control over relay
outputs, counters, clearing functions, data and disturbance recording, etc.
4.17.2 Setpoint Programming
All operations concerning setpoint programming can be performed both via the front
panel and communications. Because the front panel operations do not allow to see
all programmable parameters at the same time, this procedure may be complicated
enough for the user. It is recommended, whenever possible, to use the PAS295
companion software for all programming operations on the instrument.
When programming each setpoint, the user defines three groups of parameters that
specify the setpoint operation:
• up to four triggering conditions for setpoint operation/release
• up to four actions on setpoint operation
• optional programmable delays on setpoint operation/release
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