MDX, Ride Runner and COMs for HVAC

**ACCLR8N** · 03-01-2010, 06:48 PM

With my gauges nearly complete I'm turning my attention to the dreaded climate control. I want the buttons on my second RR touch screen, but MDX operating the logic. I have the temperatures passed to RR and manual control of my '87 vintage 4 speed blower fan passed back to MDX. At this point, the plan is to park a linear potentiometer below the LH corner of the screen lined up with the cold hot graphic. I'm not liking the thought of output commands, relays, voltage dividers and more AIN ports to send variables/booleans to MDX. There has to be a software method.

Is a value or true/false possible from Road Runner to MDX? If so, an example would be great.

My Fan control (MDX):

Code:

  <!-- Begin COM -->
    <com status="enabled">
      <commands>
        <command id="fanlow" minimum_delta_vote_time="100">
          <do function="trigger output" functionTargetID="Fan_Low" vote_opinion="on" vote_priority="medium"></do>
          <do function="trigger output" functionTargetID="Fan_MedL" vote_opinion="off" vote_priority="medium"></do>
          <do function="trigger output" functionTargetID="Fan_MedH" vote_opinion="off" vote_priority="medium"></do>
          <do function="trigger output" functionTargetID="Fan_High" vote_opinion="off" vote_priority="medium"></do>
        </command>
        <command id="fanmedl" minimum_delta_vote_time="100">
          <do function="trigger output" functionTargetID="Fan_Low" vote_opinion="off" vote_priority="medium"></do>
          <do function="trigger output" functionTargetID="Fan_MedL" vote_opinion="on" vote_priority="medium"></do>
          <do function="trigger output" functionTargetID="Fan_MedH" vote_opinion="off" vote_priority="medium"></do>
          <do function="trigger output" functionTargetID="Fan_High" vote_opinion="off" vote_priority="medium"></do>
        </command>
        <command id="fanmedh" minimum_delta_vote_time="100">
          <do function="trigger output" functionTargetID="Fan_Low" vote_opinion="off" vote_priority="medium"></do>
          <do function="trigger output" functionTargetID="Fan_MedL" vote_opinion="off" vote_priority="medium"></do>
          <do function="trigger output" functionTargetID="Fan_MedH" vote_opinion="on" vote_priority="medium"></do>
          <do function="trigger output" functionTargetID="Fan_High" vote_opinion="off" vote_priority="medium"></do>
        </command>
        <command id="fanhigh" minimum_delta_vote_time="100">
          <do function="trigger output" functionTargetID="Fan_Low" vote_opinion="off" vote_priority="medium"></do>
          <do function="trigger output" functionTargetID="Fan_MedL" vote_opinion="off" vote_priority="medium"></do>
          <do function="trigger output" functionTargetID="Fan_MedH" vote_opinion="off" vote_priority="medium"></do>
          <do function="trigger output" functionTargetID="Fan_High" vote_opinion="on" vote_priority="medium"></do>
        </command>
        <command id="hvacoff" minimum_delta_vote_time="100">
          <do function="trigger output" functionTargetID="Fan_Low" vote_opinion="off" vote_priority="medium"></do>
          <do function="trigger output" functionTargetID="Fan_MedL" vote_opinion="off" vote_priority="medium"></do>
          <do function="trigger output" functionTargetID="Fan_MedH" vote_opinion="off" vote_priority="medium"></do>
          <do function="trigger output" functionTargetID="Fan_High" vote_opinion="off" vote_priority="medium"></do>
        </command>
      </commands>
      <executable_commands>
        <external_COM_id id="RoadRunner.SDK">
        </external_COM_id>
      </executable_commands>
    </com>
  <!-- End COM -->

**2k1Toaster** · 03-01-2010, 07:22 PM

Is this what you are looking for: http://www.mp3car.com/vbulletin/fb-s...ml#post1270514

If you have a button or whatever else in RR to send a command such as "fusion_vote_RoadRunnerCommand" ("fusion_vote_" followed by something) and it is defined in the command section, it will be passed back programatically.

**ACCLR8N** · 03-01-2010, 08:31 PM

No, I have the commands working to activate outputs. I want to press my "AUTO" button in RR and have MDX go into a logic decision. Can I input something besides triggering an output?

Hardware version I can do: I press AUTO, trigger digital output 8, activate a relay that closes 5V to AIN 10. If analog10 > 0 then (we go into my logic routine for setting climate controls). Isn't there a software method to set a variable to a number or true/false?

**2k1Toaster** · 03-01-2010, 08:37 PM

No you dont have to trigger an output. Anything (including variable changing) that can be done in the if/then section of any logic section, can be done in the command section.

**ACCLR8N** · 03-01-2010, 09:02 PM

Did you hear the clang as the gears lined up (in my head)?

When I press my "AUTO" button, this sets a variable "FanSpeed" to 5. This was what I was looking for.

Code:

        <command id="hvacauto" minimum_delta_vote_time="100">
          <do function="change variable" functionTargetID="FanSpeed" vote_opinion="5" vote_priority="medium"></do>
        </command>

Thanks for your patience. and grammar.

**2k1Toaster** · 03-01-2010, 09:07 PM

Originally Posted by ACCLR8N

Did you hear the clang as the gears lined up (in my head)?

When I press my "AUTO" button, this sets a variable "FanSpeed" to 5. This was what I was looking for.

Code:

        <command id="hvacauto" minimum_delta_vote_time="100">
          <do function="change variable" functionTargetID="FanSpeed" vote_opinion="5" vote_priority="medium"></do>
        </command>

Glad this is what you were after!

Originally Posted by ACCLR8N

Thanks for your patients.

No doctor here!

I think you mean patience

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