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  1. #1
    Join Date
    Jul 2002
    Location
    NorthEast
    Posts
    811
    1)CVT converter RS 232 TO RS 485
    works very good on com port 1
    HVAC PRO works good
    2)Many of our new computers have only USB ports 3 to 4

    3)HVAC-Pro only has the option to select ports 1 to 2
    4) My laptop still has an RS 232- Port Number one

    I use my USB to serial converter with ProComm

    Procomm Plus recognizes up up to four ports easily

    My USB port number 4 works good with ProComm

    How can I make HVAC -Pro recognize ports three to four ??

    Is there a hardware or software option??
    Please, scrapping all of our N-30's and Facilitators
    is not an option

    Yhank You

  2. #2
    DIFFICULT!!

    This thread should offer some insight.

    http://www.infopackets.com/channels/...i_com_port.htm

    In the old days Windows had 4 com ports and 1 and 3 and 2 and 4 could not be used at the same time. XP allows 255 comm ports, but a lot of the software only like ports 1-4.

    A USB to serial port on com1 won't conflict with a usb to serial converted port on com2 Some serial port implementaions now are done as USB anyway. The ubs 1,3 and 2,4 conflicts were because they shared the same interrupt.

    Some, if not all USB to serial converters will maintain their COMx assignments when taken out of a given machine and re-inserted.

    Trick is to how to move the com ports around. The link is just one suggestion. Windows just doen't make it easy.



  3. #3
    Easy money... I basically run the same config on my laptop, and i have re-assigned com port 2 to my USB adapter in device manager. I forget what/if it was first assigned to, but it's easy enough to find out by poking around device manager. After that first change, i have never had to configure anything when using the device. But FYI, some of these adapters don't work with HVAC pro. I have seen at least 1 personally that doesn't. JCI probably has a list of a few supported devices. I particularly like the S2 Innovations usb to n2/serial adapter (it has a 9 pin serial port and an n2 port).

  4. #4
    Join Date
    Jul 2002
    Location
    NorthEast
    Posts
    811
    My usb to serial works great and very fast.
    I can have it on port 2 or port 4

    With Procomm and Hyperterminal it is very fast.

    If it were my choice I can do away with the serial port all together
    It is a neccessary evil
    I need the serial port to operate the Johnson and the Carrier RS-485 converter.

    I was unable to locate a pcmcia card with a serial port on it.
    We are not able to operate a RS-485 converter connected

    to a USB to Serial converters,
    We connected both a Belkin and Linsky USB to serial converters and then plugged into that

    a Johnson RS-485 converter
    and then the Carrier RS-485 converter

    No luck

    We tried it on different Laptops .no success

    Laptops with a serial port are in demand .

    Good news I connect with Johnson auxillary access to my serial port.
    It displays the message
    " there is a DOS appliction using the Comm port"
    It does something ,
    Suddenly I was able to use my serial port.
    This DOS programm is very hidden ,I can not find it.


    Any vendors or suggestion please let me know.

  5. #5
    Carrier in their APM (Advanced Product Monitor) KIT uses a http://www.bb-elec.com 485SD9TB (Half Duplex RS485 2 wire) http://www.bb-elec.com/bb-elec/liter...3ds.pdf.<br />
    They suggest that if you can't get enough power from the serial port connect a 12 volt supply to the GND and +12 terminals of the converter. In the event a 12 V supply is not available, they suggest a 9V battery.

    [Edited by keepitsimplestupid on 11-20-2006 at 10:19 PM]

  6. #6
    And for those unfamiliar with Google:

    http://www.quatech.com/catalog/rs232_pcmcia.php

    http://www.usbgear.com/1x-Serial-PCMCIA.html

    http://www.psism.com/ioports.htm

    http://www.nextag.com/pcmcia-serial-...rd/search-html

    ...

    Search terms were "pcmcia serial port card"

    Note that Express cards show up too.

  7. #7
    Join Date
    Jul 2002
    Location
    NorthEast
    Posts
    811
    Thank you for the Great Links.
    That is what we need.

    Thank You

  8. #8
    Join Date
    Aug 2006
    Location
    Tennessee
    Posts
    456
    S2 innovations also makes a converter that I have been using for quite some time that works well and a heck of alot cheaper. Got it for like 250 when JCI wanted like 600 for a cvt. I also heard that S2 was starting to work with JCI and supply them with converters.
    He who asks a question is a fool for five minutes. He who does not ask any questions is a fool forever.

  9. #9
    Join Date
    Aug 2006
    Location
    Tennessee
    Posts
    456
    I have tried several serial to USB converters and have not got any to work, beside the S2. I have tried a Belkin, Quatech PCMCIA card, and a Keyspan converter.
    He who asks a question is a fool for five minutes. He who does not ask any questions is a fool forever.

  10. #10
    Join Date
    Jul 2002
    Location
    NorthEast
    Posts
    811
    The B&B converter for the Carrier network definetly does not work.

  11. #11
    cleancondenser:
    Did you try the B&B with the 9V battery?

    Remember that RS485 comes in two flavors.
    2 wire and 4 wire.
    Watch your terminators.
    And watch the manufacture labels of (+) ad (-)
    And it goes without saying that xmit connects to recieve and receve to xmit.
    RS485 can be a bear to debug at times. A scope and a multimeter helps.

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