PID Server
If SB 109 is OFF, note that you can use PID Server to tune loops and log running PID values.
M90
You can auto-tune M90 PID loops by using Unitronics' PID Server. This utility is located under the Tools menu.
M91/Jazz
M91 and Jazz controllers may be tuned via SBs. Each PID loop is linked to two SBs, one to activate auto-tune, and one that signals when the process is complete.
The auto-tune operation uses the parameters defined in the PID Loop
Set Point
Input Range:PV Low Limit & PV High Limit
Output Range:CV Low Limit & CV High Limit
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Notes ♦ |
Each loop must be tuned separately. |
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Do not stop auto-tune before the process is complete. If the process is stopped, you must start it from the beginning. |
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SB109 Select PID with auto-tune (not supported by M90): A new PID function was released with V3.72 (B08) This function, compatible with M91 only, offers both improved PID function and auto-tune. In order to implement this function, you must turn SB109 ON in your application. |
To auto-tune a loop in your application:
At Power-up, SET SB109 ON.
Enable the PID output (for example, if you used MB0 to enable an H.S.O., turn MB0 ON).
Activate the Run PID MB for the loop you want to tune.
Turn the appropriate Start auto-tune SB ON; activating the auto-tune function.
When auto-tune is complete, the SB will turn OFF, and the appropriate auto-tune is Complete SB will turn ON.
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PID Server If SB 109 is OFF, note that you can use PID Server to tune loops and log running PID values. |
For more information, refer to the U90 Ladder Example PID M91 Auto-tune.U90.