I.14
SEL-311C Relay Instruction Manual Date Code 20060320
DNP Communications
DNP3 Documentation
The Status field is used exactly as defined. All other fields are ignored. A
pulse operation asserts a point for a single processing interval. Caution should
be exercised with multiple remote bit pulses in a single message (i.e., point
count > 1), as this may result in some of the pulse commands being ignored
and returning an already active status.
Analog Outputs (objects 40 and 41) are supported as defined by the preceding
table. Flags returned with object 40 responses are always set to 0. The Control
Status field of object 41 requests is ignored. If the value written to index 0 is
outside of the range 1 through 6, the relay will not accept the value and will
return a hardware error status.
Relay Summary
Event Data
Whenever there is unread relay event summary data (fault data), binary input
point 1023 will be set. In order to load the next available relay event summary,
the master should pulse binary output point 23. This will cause the event
summary analogs (points 103–111) to be loaded with information from the
next oldest relay event summary. Since the summary data is stored in a first-in,
first-out manner, loading the next event will cause the data from the previous
load to be discarded. The event summary analogs will retain this information
until the next event is loaded. If no further event summaries are available,
attempting to load the next event will cause the event type analog (point 103)
to be set to 0.
To Next Page
Loading...
