ProSoft Technology MVI56-101S - Manual (Page 44)

Configuring the MVI56-101S Module MVI56-101S ♦ ControlLogix Platform
User Manual IEC 60870-5-101 Slave Communication Module
Page 44 of 193 ProSoft Technology, Inc.
August 2, 2011
2.3.20 Event Priority
Event Priority permits the user to set reporting priorities for data change events
generated for each data type. The configuration file contains the following
parameters to support this feature:
The Set Priority Queues parameter must be enabled for this feature to be used.
Each of the Monitored Point ASDUs must be assigned a unique priority index
from 0 to 7. When events of the ASDU with a lower priority number are present,
they will always be reported before events from any other ASDUs with higher
priority numbers.
2.3.21 Cyclic Set IV Time
1 to 65535 seconds, or 0 to disable Invalid Bit Monitoring
The parameter should be set to a value significantly greater than the value of the
IV Check Delay Time parameter, multiplied by the value of the IV Fail Count
parameter. Example:
If, IV Check Delay = 3;
And, IV Fail Count = 5;
Then set Cyclic Set IV Time significantly greater than 15; preferably some
multiple of this value, like 30, 45, 60,
or more.
The Cyclic Set IV Time parameter is one of three parameters needed to establish
a fail-safe data validation system for this protocol implementation. This
parameter is used with the IV Check Delay Time and the IV Fail Count
parameters to create a way to alert the remote IEC-101 Master to situations
where data being sent by the module might be invalid.