patrick.thomas@LIGO.ORG - posted 16:48, Monday 29 January 2018 - last comment - 15:35, Wednesday 31 January 2018(40318)
Testing EX HEPI pump control running on Beckhoff
Filiberto, Hugh, Patrick, Richard This morning Hugh and I took the end X ISI guardian to ISI_DAMPED_HEPI_OFFLINE. Hugh and Filiberto then went to end X and Filiberto moved the wiring from the existing HEPI pump controller box over to the Beckhoff box. We found some minor issues with the Beckhoff PLC code that I corrected. Restarting the PLC code tripped off the power to the HEPI pump motor and I went to end X to reset it. We have since tuned the Beckhoff PID (actually just PI) and will leave it running overnight.
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Filiberto, Richard, Patrick Today we took it off of PID control and ramped down the VFD. Filiberto then went to end X and connected the VFD readback signals to the Beckhoff terminal. We then turned the PID back on. It is currently keeping the differential pressure at 70 psi.