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[Imported] IEC 104 communication failure only link layer messages available

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[Imported] IEC 104 communication failure only link layer messages available

>>Message imported from previous forum - Category:SCADAPack RTU<<
User: mchartrand, originally posted: 2018-10-25 14:35:13 Id:214
This is a re-posting from the obsoleted (October 2018) "Schneider Electric Telemetry & SCADA" forum.

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**_noquarter:
We are using T 200 FRTU for automation of our consumer substations. We are facing communication failure issues with CSS even through network strength in the area is satisfactory. We have been doing hard reboots of these sub stations by sending personnel on site for re-establishment of communication. In order to identify the problem, port traces have been done at some of these T200 sites. Port trace logs of one such offline CSS is shown below._**

_07:37:29.121: IEC104 Slave: Session 0x20e2a8d0 Offline
07:37:33.892: --- IEC104 Slave 1 Unnumbered
07:37:33.892: STARTDT ACT
07:37:33.893: 68 04 07 00 00 00
07:37:33.893: T200 Addr(0) Sector(183) Application Header, Clock synchronization command
07:37:34.308: Quantity(1) SQ(0) COT(6, activation)
07:37:34.309: 67 01 06 00 b7 00 00 00 00 bd 83 25 07 07 08 12
07:37:43.854: IEC104 Slave 1 Unnumbered
07:39:26.038: STARTDT ACT
07:39:26.039: 68 04 07 00 00 00
07:39:26.039: T200 Addr(0) Sector(183) Application Header, Clock synchronization command
07:39:26.662: Quantity(1) SQ(0) COT(6, activation)
07:39:26.662: 67 01 06 00 b7 00 00 00 00 7a 67 27 07 07 08 12
07:39:36.618: IEC104 Slave 1 Unnumbered
07:39:57.905: TESTFR ACT
07:39:57.906: 68 04 43 00 00 00
07:39:57.906: IEC104 Slave 1 Unnumbered
07:40:18.954: TESTFR ACT
07:40:18.954: 68 04 43 00 00 00
07:40:18.954: