Televac MM200 questions

["James P. Withrow via Tech-talk" <tech-talk at aps.anl.gov>]

Hello all - 

I'm in the process of moving instrumentation on our beamline to EPICS-based solutions instead of bespoke hardware/software combinations. I've recently moved the vacuum readouts (Televac MM200) and ion pumps (Digitel MPC) to IOCs using the synApps 'vac' module. This solution works perfectly for both the gauges and the pumps - with the exception of one set of Televac gauges. The set of gauges which works is using firmware rev. 2.13, while the one having issues is on 2.18. The latter set will run normally for 20-30 seconds, and then appear to hang. Once the vac module times out, it attempts to send its next query which confuses the gauge (returns 'R?') but then starts working again. 

Has anyone else encountered this issue and are there any possible tuning options for the serial communications? 

Thank you in advance, 

-Jim

Jim Withrow, Research Support Specialist - jwithrow at cornell.edu

NE-CAT, Cornell University - https://necat.chem.cornell.edu

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