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Entry  Sat Feb 26 01:01:40 2022, Tega, Update, VAC, Ongoing work to get the FRG gauges readouts to EPICs channels 
    Reply  Sat Feb 26 15:45:14 2022, Tega, Update, VAC, Ongoing work to get the FRG gauges readouts to EPICs channels Vac-gauges-flow-diagram.png
       Reply  Mon Feb 28 19:15:10 2022, Tega, Update, VAC, Ongoing work to get the FRG gauges readouts to EPICs channels 
       Reply  Tue Mar 1 20:38:49 2022, Tega, Update, VAC, Ongoing work to get the FRG gauges readouts to EPICs channels Working_Serial_Port_List_1.pngWorking_Serial_Port_List_2.pngWorking_Config_Ports#1-5.pngWorking_Config_Ports#7-8.png
          Reply  Wed Mar 2 11:50:39 2022, Tega, Update, VAC, Ongoing work to get the FRG gauges readouts to EPICs channels XGS600_IOLAN_settings_1.pngXGS600_IOLAN_settings_2.pngXGS600_USBserial_settings.pngXGS600_comm_test.pyXGS600_comm_test_result.txt
             Reply  Wed Mar 2 12:40:08 2022, Tega, Update, VAC, Ongoing work to get the FRG gauges readouts to EPICs channels 6x
                Reply  Sun Mar 6 18:14:45 2022, Tega, Update, VAC, Ongoing work to get the FRG gauges readouts to EPICs channels iolan_xgs_comm_investigation.pdf
                   Reply  Mon Mar 7 13:53:40 2022, Tega, Update, VAC, Ongoing work to get the FRG gauges readouts to EPICs channels iolan_xgs_comm_live.pdf
                      Reply  Mon Mar 7 14:52:34 2022, Koji, Update, VAC, Ongoing work to get the FRG gauges readouts to EPICs channels 
                         Reply  Tue Mar 8 12:08:47 2022, Tega, Update, VAC, Ongoing work to get the FRG gauges readouts to EPICs channels XGS600_calibration.pdf
Message ID: 16706     Entry time: Mon Mar 7 13:53:40 2022     In reply to: 16704     Reply to this: 16707
Author: Tega 
Type: Update 
Category: VAC 
Subject: Ongoing work to get the FRG gauges readouts to EPICs channels 

So it appears that my deduction from the pictures of needing a cable swap was correct, however, it turns out that the installed cable was actually the normal RS232 and what we need instead is the RS232 null cable. After the swap was done, the communication between c1vac and the XGS600 controller became active. Although, the data makes it all to the to c1vac without any issues, the scope view of it shows that it is mainly utilizing the upper half of the voltage range which is just over 50% of the available range. I don't know what to make of this.

 

I guess, the only remaining issue now is the incorrect atmospheric pressure reading of 1000 Torrs. 

 

Quote:

Following repeated failure to establish communication between c1vac and the XGS600 controller via Perle IOLAN serial device server, I decided to monitor the signal voltage of the communication channels (pin#2, pin#3 and pin#5) using an oscilloscope. The result of this investigation is presented in the attached pdf document. In summary, it seems I have used a crossed wired RS232 serial cable instead of a normal RS232 serial cable, so the c1vac read request command is being relayed on the wrong comm channel (pin#2 instead of pin#3). I will swap out the cable to see if this resolves the problem.  

 

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iolan_xgs_comm_live.pdf
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