plz help,PD ctrl( PID in RSlogix5),it doesnt work with ouput%

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plz help,PD ctrl( PID in RSlogix5),it doesnt work with ouput%
I want to display output in rsview32 by set bit PD14:0.OUT as picture bellow :
I have Setpoint value,Process Variable,but Error ?
thank you for reading.




65370429.png
 
From your screen shot your PID is in the manual mode.

For a more complete help you should post your .RSP file ( zip it first)

FYI : Again from the limited screen shot the rung with your PID instruction should be conditional, usually a timer. That's in the PLC5 world other controllers are different.

What ladder file is this in? Is it being called?
 
Last edited:
this is an small example use PID to control valve (0-100% ),it recieved sign from Level sensor (0-200 cm, 4-20 mA)

thank you so much

RS.jpg
 

Attachments

  • HuyTesLogix.zip
    29.4 KB · Views: 13
Appears to be something wrong with the zip file you posted I cannot not open it.
 
Last edited:
A second download of your zip file now I can open it.

The file in the zip is different then the screen shot one.
In the zipped file you should put a one second timer bit on the same rung as the PID this will match the configured update time of the PID instruction. See picture

You have the control action set to "PV-SP" ( direct acting) your process will have to exceed your setpoint for an output to start increasing.

condition.jpg
 
Last edited:
In the file you first posted you had the "BTR" BTW" instruction set up properly.
In the new file they are not go back to the original setup.

Also see my picture above on how to trigger the PID instruction with the XIC timer done bit. The way you have it in the new posted file will not work.
 
I trying to make it work,in the first and second post it not work,I dont know why,I set up PID the same with some correct example in manual PLC5 but...
Also see my picture above on how to trigger the PID instruction with the XIC timer done bit. The way you have it in the new posted file will not work.
Click to expand...

thank for your advise. i will try with this question
 
the driver setting indicates that you're running this in the EMULATOR ... sorry - that won't "do" PID ...

in simplest terms, the Emulator software will NOT execute/run the PID equation ... you need a real/hardware PLC-5 for the PID to work ...
 
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