Siemens 6RA70 DC Drive
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Jun 13, 2022 6:02 am
Cause : Telegram failure at GSST1 comes when the receipt of the first valid protocol, no further telegrams have been received within the time period set in parameter P787.
Possible fault causes
- Cable break.
- Error in USS master.
1 Reply
Jun 13, 2022 6:03 am
Cause : Telegram failure at GSST1 when P780 = 2:
USS telegram failure at G-SST1
(active from the first receipt of a valid protocol in all operating states)
After the receipt of the first valid protocol, no further telegrams have been received within the time period set in parameter P787.
Possible fault causes
♦ Cable break
♦ Error in USS master
