ProSoft Technology MVI56-101S - Manual (Page 149)

MVI56-101S ♦ ControlLogix Platform Reference
IEC 60870-5-101 Slave Communication Module User Manual
ProSoft Technology, Inc. Page 149 of 193
August 2, 2011
Event Priority
Event Priority permits the user to set reporting priorities for data change events
generated for each ASDU data type. The configuration file contains the following
parameters to support this feature:
The Set Priority Queues parameter must be set to YES for this feature to be
used. Each of the Monitored Point ASDUs must be assigned a unique priority
index from 0 to 7. If Event Priority is enabled, whenever events of an ASDU with
a lower priority number are present, they will always be reported before events
from any other ASDUs with higher priority numbers. Multiple events will be
assembled into each message packet for transmission. This methodology limits
the likelihood of a buffer overflow and still maximizes the bandwidth usage on the
communication channel.