Virgo Logbook

AdV-COM (automation)

bersanetti, allocca, swinkels - 1:23 Saturday 22 April 2017 (37335)

ITF_STATUS Troubles

Tonight after the shift we wanted to leave the ITF in AUTORELOCK mode, but as soon as we opened ITF_STATUS we noticed it was stuck with a ezca connection error, complaining that "function does not have the method warning"; since the only "warning" method I could think about was the logger one, I commented all the log.warning lines in ITF_STATUS and then added the log = logging.getLogger(__name__) instruction to ITF_STATUS_library.py, but I'm not sure this is the right way to fix the problem. Notice that the DMS flags worked correctly all day long.

After that I found out that ITF_STATUS did not recognize the new [ACQUIRE_]LOW_NOISE_1 states, so I added them in the configuration file and updated the locked_state_index parameter to 122, which is the LOW_NOISE_1 state index.

I tried a manual unlock to verify the procedure, and it seems working. Unfortunately, due to the suppression of all the log.warnings I cannot be sure of definite success.

However, we leave the ITF in AUTORELOCK mode, and I will check remotely tomorrow if everything is working as expected.

Comments to this report:

bersanetti - 14:09 Saturday 22 April 2017 (37336)

I didn't get the chance to verify the behaviour of ITF_STATUS as the CoilsSb* servers keep crashing, and everything was stuck in DOWN; I disabled the use of the relays in ITF_LOCK, and commented also the duplication of the reset of the 6MHz amplitude on the LNFS which was present in the DOWN state of ITF_LOCK.

carbognani - 16:21 Monday 24 April 2017 (37353)

Checking the PySb code for possible causes of those crashes I spotted the fact that on the SET_OUTPUTS command implementation a burst of 24 single modbus coil setting commands was generated. I have inserted a small delay between the commands (0.2 sec) and I was not able to replicate the crash while commanding the relays from the VPM interface or from ITF_LOCK. The use of the relays in the DOWN and LOW_NOISE_1 states of ITF_LOCK has been provisionally restored.