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Keysight IO Monitor IO Data Returns of 'U?!' and '?5A'

Question asked by AWilliams on Mar 12, 2018

Hello all,

 

I am monitoring the IO activity between the computer and a temperature controller to debug an issue and I am running into commands that I am unfamiliar with. 

 

I am running the Keysight IO Libraries Suite version 17, with my IO monitor capturing both Keysight VISA and SICL messages.

 

I am using VEE software (Pro version 9.3) to ping the temperature controller for the temperature readings from its two probes every 15 seconds. I've done this with both the source, .vee, code, as well as compiled, .vxe, code. When it sends the write command, it is preempted by a "U?!", and when I send the read command, it's preempted by a "?5A" every time it reads/writes to the controller.

 

In the IO monitor it looks like this for each probe read/write command:

Time StampProgramAddressSourceMethod CallIO DataReturn ValueTime (ms)
08:41:48.211veerun.exegpib0SICLSICL::ilock00.232743
08:41:48.211veerun.exegpib0SICLSICL::igpibsendcmdU?!00.261722
08:41:48.211veerun.exegpib0SICLSICL::iwritePT2.\n00.296739
08:41:48.212veerun.exegpib0SICLSICL::iunlock00.151539
08:41:48.520veerun.exegpib0SICLSICL::ilock00.186858
08:41:48.520veerun.exegpib0SICLSICL::igpibsendcmd?5A00.219762
08:41:48.521veerun.exegpib0SICLSICL::ireadT2 20.4.\n00.296135
08:41:48.521veerun.exegpib0SICLSICL::iunlock00.129201
08:41:55.452AgilentIOServer.exeSICLSICL::iopengpib0126.9504
08:41:55.482AgilentIOServer.exegpib0SICLSICL::itimeout00.155463

 

Any insight on what the highlighted cells mean and are doing would be greatly appreciated.

 

Thank you.

 

Amanda

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