Since last Friday (2018.01.26), after BF4 BF5 TTD cables swapped,
we took the following local runs for ttlost test with whole Barrel:
pulse100Hz, 21337s before DC24 got ttlost;
pulse500Hz, 42311s, DC13 ttlost;
aux run ~7Hz, 39011s, DC24 got ttlost;
aux run, 1208s, DC13 ttlost;
aux run, 54066s (15 hours), several ttlost and dc27 got b2llost.
The condition is much better than before (when TTD cables were not swapped, DC18 often ttlost).
BF7 has problem, it has no RPC hit at all! But it is generating events, so won't break data taking.
This is not fixed yet. Have tried power cycle, re-programming...
Now is working to increase the trigger rate to ~30k Hz.
In the mean while, try to fix several minor problems: BF7, and some other missing layers/channels.
Yinghui