Hi Willy, its me again
1. Problem with the other RIO racks when rack #6 is connected:
Has this one been resolved or not ?
Have you checked the DIPSW settings on the adapter in rack #5 ?
2. If no 1. is OK: I suspect that the problems with the block transfers is that the HSCE2 module in rack #6 doesnt respond.
Are there some DIPSW settings on this module ?
Have you tried to swap the HSCE2 module in this rack with another ?
3. If no 2. is OK: check the block transfer bits for the BTW/BTR in 70:1/70:2
Does the STARTED bits (n120:55/14 and n120:50/14) come sometime ?
Does the ENEBLEDWAITING bits (n120:55/10 and n120:50/10) come sometime ?
Does the NORESPONSE bits (n120:55/9 and n120:50/9) come sometime ?
Does the ERROR bits (n120:55/12 and n120:50/12) come sometime ?
If an ERROR bit is set, then the words n120:57 and/or n120:52 will contain an error code.
You can try to trap the bits with some other intermediary bits via OTL.
If you find out of something, good or bad, then remember to post your findings. Its allways nice to get some feedback.
Good luck.