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  1. #1

    Maxline/ Infocon Comm 4 Driver Problems

    I will do my best to include all info so there are not too many questions. I am working on a job with old tracer 100 controls. This includes about 360 comm 4 VAVs attached to 6 command modules which are attached to 3 tracer 100 panels (2 command modules per tracer panel). The info from tracer system is viewed via HyperTerminal front end. I made a list of all communicating vavs from HyperTerminal then removed comm 4 buss from command module and hooked up to JACE. When I perform a discover I am only seeing about a third of all the vavs on the buss that are shown communicating on HyperTerminal. Next I attempted to change the response timeout and intermessage delay and performed another discover. No change in VAVs discovered. I also did a trace while adjusting the response timeout/ intermessage delay and noticed that there is no change in discovery time when these setting are adjusted. In one case I turned response timeout up over 30 seconds yet I received a response timeout in trace utility within 2 seconds. I then noticed that only the newer UCM VAV’s were coming through UCM 2, 3, and 4s. I then located one of the oldest boxes, that I confirmed was communicating and responding to commands via HyperTerminal, on the comm 4 buss and ran a direct connection between it and JACE. The JACE still will not discover it. I have talked with tech support in China several times and they are no help, keep saying it is a wiring issue. My question is simple what is the command module doing differently than the JACE as it can see all VAVs. I am also attaching a picture of one of the old style VAV boards in case this helps with troubleshooting. Any help is appreciated.
    Name:  Freehold Mall Old VAV.jpg
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  2. #2
    Join Date
    Apr 2007
    Amarillo by mornin'
    I know you have probably checked, but I am going to ask anyways. Is it the newest driver? The one we have its dated 12/9/12.

  3. #3
    Join Date
    Jun 2004
    Did you change the addresses on the VAVs? They were the same on the command modules. The addresses can only be up to 127 also if I remember correctly.

  4. #4
    Yes i have latest version of driver, and yes all adresses are between 65 and 127. I was thinking it may be a better idea to connect to command module rather than vav buss. Does anyone know what protocall the command module uses/ if there is a driver that will communicate with it. I havent been able to dig up any info on old command module so if anyone has has manuals for 1989 commanfd module it would be very helpful.

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