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  1. #1
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    Jan 2015
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    Need Technical Help: Ambex - Watlow EZ-Zone PM6 - Mac OS

    I just purchased a Ambex and it came with the Watlow EZ-Zone PM6 and the Roaster Dynamics Software. I was curious if anyone knows if the USB-2-485-WE cable that comes with the Ambex roaster would work with Mac OS and where I can get a driver. I would like to use Artisan and its MODBUS support to read the temperatures from the thermocouples.

    Thanks

  2. #2
    Member
    Join Date
    Jun 2014
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    59
    I dont think it's compatible with a Mac.

  3. #3
    Junior Member
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    Jan 2015
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    Well I was curious as some other roasters use the Watlow EZ-Zone PM6 and I think they have a Mac driver.

    Or i'd be interested at least to use with linux.

  4. #4
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    Jan 2015
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    i have a working drivers, now im trying to figure out the correct registers to use....

  5. #5
    Junior Member
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    Oct 2018
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    You mention the USB cable? Where does the non-computer end of the cable go?

    That is, does the roaster have a built in serial/USB convertor or an external device like the SerialComm 485?

    There's a ton of Artisan info online (https://artisan-scope.org) where you can probably find others who have had similar setup issues.

    You may have to run "Parallel" or some other utility for Artisan on a MAC???

  6. #6
    Junior Member
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    Jan 2015
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    I am able to use the out of box Mac OS RS 485 to read from the Watlow PM6.

    My issue now is trying to figure out the correct registers to read.

    The Roaster Dynamics guy says "I use 240 and 244, or 360 and 440" but those are not giving me anything understandable. They are reporting back like 17012 or a number close to that and don't seem to change when heating and cooling the machine.

    The watlow documentation says

    "
    Analog Input 1 value is contained in two 16-bit registers. Register 360 contains the two lower bytes (least significant word,LSW) while register 361 contains the two higher bytes (most significant word, MSW). Register 360 is 0x0168. The 32-bitanswer is an IEEE 754, 32-bit float data type.

    The packet described is assembled and sent to the PM as one continuous stream of bits per the Modbus standard. The packetreturned from the PM is decoded per the Modbus standard.
    In this example, we extract 0x977D 0x429C from the packet for the answer. Changing the Modbus Word Order to High Word,Low Word we see the answer is 0x429C 0x977D.


    Converting the raw data 0X429C977D to a 32-bit floating point value shows the analog input is reading +78.295 degrees.
    "

    I am trying to figure out if its because I need to read two registers for one value or not and if thats even possible inside artisan.

  7. #7
    Junior Member
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    What is the serial number on the side of your Watlow?

  8. #8
    Junior Member
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    Jan 2015
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    Need Technical Help:  Ambex - Watlow EZ-Zone PM6 - Mac OS-img_20181207_135225.jpg

    See screenshot above

  9. #9
    Junior Member
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    Oct 2018
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    Cool. And I meant to ask for the model number, but everything is in your image.

    Your Watlow shows a "dash" 1 number so it's definitely current/compatible with the Modbus protocol.

    And what is the serial/USB adapter you are using (make/model)?

  10. #10
    Junior Member
    Join Date
    Jan 2015
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    11
    It's and ftdi model it's a USB to rs485 cable. See photos below. It communicates with the watlow, but I can't figure out the correct registers to read.

    Need Technical Help:  Ambex - Watlow EZ-Zone PM6 - Mac OS-img_20181231_164625.jpg

    Need Technical Help:  Ambex - Watlow EZ-Zone PM6 - Mac OS-img_20181231_164638.jpg
    Last edited by seion; 12-31-2018 at 03:22 PM.

 

 
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