Send the opposite value of a slider controlled by Artisan PID to another slider

[Robjones6146]

I would like to send the opposite value of a slider to another slider that is controlled by Artisan PID. When the Hot air slider is at 60 (6 volts output), I want the Cold air slider to be 40 (4 volts) and visa versa.

I have two damper paddles that need to equal 100% (if the cold is 20% then the hot must be 80% and visa versa) I am using the Set Value >> Background in PID Control. I am using two OUT1002 Phidgets that send 0 - 10v signals to two Belimo rotary actuators that rotate the damper paddle through 90 degrees (The Belimo works with a 0 - 10 volt signal for positioning). The voltage corresponds nicely with the damper position eg. 3 volts = 30% open. I want to send the other actuator 7 volts (10 - 3 = 7) for 70% open.

I have tried achieving this in PID Control with no success. (Lots of variations)
PID settings (p - 3, i - 0.05, d - 10)
Positive - Cold air
Negative - Hot air
Invert Control - checked
Duty Max - 100%
Duty Min -100%

Windows 10
Artisan 2.8.5 (47c8ae6)
Phidgets Vint Hub

I have requested assistance in the Discussions where there is a detailed description. Artisan PID question. Control two damper paddles controlled via sliders

I can't find anything in the documentation that deals with this issue.
I have tried this, and although it doesn't exactly apply, it might be relevant when used with other settings. #621
I would appreciate any hardware or software advice or solution to achieve this.

[Robjones6146]

Can anybody help me with this please?

[MAKOMO]

What you request is simply not directly possible. However, you can go with just one slider that sends two commands (separated by a semicolon), the first just sends the slider value v and the other the 100-v.

[Robjones6146]

I know this is over a year ago. I am only implementing it now and cant get it to work.

Please can you confirm that this is correct. In the Sliders Tab:
Event (Slider): VOUT Command out(0,{},687340:4);out(0,100-{},687340:3)

• No space after semicolon
• replace v with {}

[MAKOMO]

You forgot to state WHAT exactly is not working. Your slider VOUT command looks fine.

[Robjones6146]

Thank you, I am sure it will work now. I haven't tested this out(0,{},687340:4);out(0,100-{},687340:3) yet, I only have access to the machine on Monday. I tried various combination: out(0,{},687340:4); out(0,100-v,687340:3) - I had a space after the semicolon - I used your suggestion literally Using this Slider for PID Using the the two slider method, the Hot Slider has to reach 0% before the Cold Slider starts moving (+100% to -100%) This way when Hot is 80% then Cold is 20%

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On Sun, 27 Oct 2024 at 09:25, Marko Luther ***@***.***> wrote: You forgot to state WHAT exactly is not working. Your slider VOUT command looks fine. — Reply to this email directly, view it on GitHub <#1230 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BBEHJB7Z2RJWZIYKVAH2JOLZ5SBL3AVCNFSM6AAAAABQVQ5KFOVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDIMZZHA4DONBTHA> . You are receiving this because you authored the thread.Message ID: ***@***.***>