Event Buffering (Soe Vs Most Recent) - MultiTrode MultiSmart Integrator Manual

Lobley St SPS SP331 General (Electrical Manual (MPA) Multismart Manual Multitrode System Integrator Guide) General
Also, check that the other device supports all of these object types. In particular, binary output events and
analog output events may not be supported (many devices do not support these object types).
If this is the case, then it may be necessary to map these outputs to binary and analog input points as
well so as to get indication of change of state for these points.
Many DNP masters do not support events with time stamps. Therefore, it may be necessary to modify
these variations (for objects 2, 11, 22, and 32).
Not all devices support frozen counters either (including ClearSCADA).
7.3 Event buffering (SOE vs. Most Recent)
MultiSmart DNP Slave has the ability to buffer events between polls. The maximum number of events is
defined for each object type, and can be reconfigured. However, using excessively large buffers could
result in bandwidth issues (potential for very large messages being generated in response to an event
poll). These buffer sizes can be reconfigured via the Advanced screen under:
The following parameters exist:
•
Max analog input events
•
Max analog output events
•
Max binary input events
•
Max binary output events
•
Max counter events
•
Max frozen counter events
When multiple events occur within a single poll period for a particular point, it is possible to buffer all of
the events for that point or to only buffer the last value. This behaviour can be defined for each DNP
object type. The following parameters allow for this configuration:
•
Analog input event mode
•
Analog output event mode
•
Binary input event mode
•
Binary output event mode
•
Counter event mode
•
Frozen counter event mode
Each of these modes can be set to SOE (sequence of events) or most recent. If SOE is selected, then all
events are buffered and sent back in response to an event poll. For Most Recent, only the latest value is
returned via an event poll.
MultiSmart contains statistics under
Overflows value is important. It will tell you if the buffer size is too small.
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Q-Pulse Id VM357
Note:
The default DNP configuration in MultiSmart is for Most Recent except for binary inputs and binary
outputs. The binary classes both use sequence of events (SOE).
MultiSmart Integrator Guide
Active 26/09/2013
- specifically the
MultiSmart_Integrator_Guide_R01.doc
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