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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: 16704     Entry time: Sun Mar 6 18:14:45 2022     In reply to: 16693     Reply to this: 16706
Author: Tega 
Type: Update 
Category: VAC 
Subject: Ongoing work to get the FRG gauges readouts to EPICs channels 

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.  

Attachment 1: iolan_xgs_comm_investigation.pdf  651 kB  | Hide | Hide all
iolan_xgs_comm_investigation.pdf iolan_xgs_comm_investigation.pdf iolan_xgs_comm_investigation.pdf iolan_xgs_comm_investigation.pdf
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