IEC870 driver: redundancy according to IEC60870-5-104 Edition 2 can lead to not acknowledged frames

IEC870 driver: redundancy according to IEC60870-5-104 Edition 2 can lead to not acknowledged frames

Summary

During the redundancy switch between primary and secondary IP in IEC60870 driver (Master) - according procedure introduced by Edition 2 of the IEC60870-5-104 Standard - the slave can still send some frames. But when the procedure starts - with APCI frame 'StopDT act' - the driver neither acknowledges to the slave the received data frames nor transfers data to the zenon Runtime.

Description

During the redundancy switch between primary and secondary IP in IEC60870 driver (Master) - according procedure introduced by Edition 2 of the IEC60870-5-104 Standard - the slave can still send some frames. But when the procedure starts - with APCI frame 'StopDT act' - the driver neither acknowledges to the slave the received data frames nor transfers data to the zenon Runtime.

Solution

Now the driver processes received data even during it waits for StopDT confirmation and then checks if all pending data has been acknowledged.

Information




Issue Number: 31854
Fixed on Date: 19.5.2014
Versions: 6.51 0 BUILD 27 | 7.20 0 BUILD 17768