at 08:01:00 PDT h1iopsusex reported a very long ADC holdtime of 77uS at 08:01:00 PDT. This caused the IOP to lose synchronization of its 18bit DAC channels and it reverted to the safe state of zeroing all DAC outputs. I restarted the IOP model, which of course required restart of all the SUS models. Jim first put the EX seismic into a safe state to allow this.

I verified the 18bit -DAC AUTOCAL reported success for all DACs, I reset the IPC errors and cleared the DAQ-CRC counters.

Here is the adc hold time information from /proc/h1iopsusex/status:

adcHoldTimeEverMax=77

adcHoldTimeEverMaxWhen=1183388478

here is the AUTOCAL data

[5393357.982766] h1iopsusex: DAC AUTOCAL SUCCESS in 5384 milliseconds 

[5393363.341051] h1iopsusex: DAC AUTOCAL SUCCESS in 5346 milliseconds 

[5393369.127216] h1iopsusex: DAC AUTOCAL SUCCESS in 5331 milliseconds 

[5393374.485325] h1iopsusex: DAC AUTOCAL SUCCESS in 5346 milliseconds 

[5393379.843006] h1iopsusex: DAC AUTOCAL SUCCESS in 5398 milliseconds