Prosoft-technology 5201-MNET-101S Uživatelský manuál stáhnout pdf (Strana 110)

Reference IEC-101 Slave ♦ ProLinx Communication Gateway

Protocol Manual IEC 60870-5-101 v3 Slave (Firmware version 3.xx)

Page 110 of 159 ProSoft Technology, Inc.

August 6, 2010

Invalid Bit Monitoring

This feature allows the application to set the invalid (IV) quality bit of data points

for all supported Monitored ASDU types. If the feature is enabled, the status of

each point configured by the user can have the individual IV quality bit

determined by the processor.

The parameters required to support this feature are:

 Cyclic Set IV Time

 IV Check Delay Time

 IV Fail Count

To disable this feature, set the IV Fail Count parameter to 0. If the IV bit field is

absent or set to 0, the invalid quality state for the point will always be reported as

valid. If used, the Cyclic Set IV Time parameter must be at least 3 times larger

than the IV Check Delay Time.

The C

YCLIC SET IV TIME parameter determines the interval at which the driver will

set all the IV bits for the points being monitored in the gateway. If the IV bit is ON

for the number of times specified by the IV

FAIL COUNT parameter , the point is in

an invalid state. The driver will check the state of each bit at the frequency

determined by the IV

CHECK DELAY TIME.

The values for the parameters must permit the driver to properly execute the

logic. For example, the value for C

YCLIC SET IV TIME should be twice the IV

CHECK DELAY TIME, multiplied by the IV FAIL COUNT. If the cyclic timer is set to a

smaller value, the logic may not execute correctly.

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Prosoft-technology 5201-MNET-101S Uživatelský manuál Strana 110