ProSoft Technology 5205-104S-PDPS - Manual (Page 39)

Protocol Implementation 4205/5205-TS-104S-PDPS ♦ ProLinx Standalone
IEC-60870-5-104 to PDPS Communication Module with Time Stamp
ProSoft Technology, Inc. Page 39 of 128
July 12, 2007
Deadband – Sets the deadband for each Measured point. If the value changes
from more than the configured deadband , the module will generate an event for
this point.
IV DB Bit –
This feature allows the application to set the invalid (IV) quality bit of
the protocol for all the monitored ASDU types supported. If you enable this
feature, the processor can determine the individual IV quality bit status of each
point you configured.
The following parameters must be configured in order to use this feature:
Cyclic Set IV Time : 10 #Number of sec intervals
IV Check Delay Time : 2 #Number of sec intervals between
#investigation
IV Fail Count : 2 #Number of IV failures recognized
#before reporting
To disable this feature, set the IV Fail Count parameter to 0. If used, the Cyclic
Set IV Time parameter must be at least 3 times larger than the IV Check Delay
Time.
The Cyclic Set IV Time parameter must be set to determine how frequently the IV
Checks will be performed. If the IV bit is ON for a number of times given by the IV
Fail Count parameter the module will consider the point as invalid. The following
illustration shows how these parameters are implemented: