Setting an Upper and Lower PID Output Limit |
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When using the PID (proportional integral derivative) function in Yaskawa drives, it may be desired to set an upper limit and/or lower limit to keep the PID output from exceeding above or dropping below a fixed level. The PID Output (monitor U5-03) corresponds to the output frequency and is displayed as a percentage of the maximum frequency (60hz default).
Note: A PID output limit is ONLY applicable when PID mode is enabled (b5-01 ≠ 1).
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PID Output Limit (Upper) Set parameter b5-06 to a desired PID output limit (upper) as a percentage of the maximum frequency. This will have an effect when the PID Output (monitor U5-03) is either positive or negative (when b5-11 =1).
PID Output Lower Limit Set parameter b5-34 to a desired PID output lower limit as a percentage of the maximum frequency. This limit applies to a positive PID output (monitor U5-03) ONLY and therefore will limit the motor direction to forward, regardless of the b5-11 setting. A negative value set in b5-34 will not have any effect.
Note: The output frequency will be limited to the larger of b5-34 (PID Output Lower Limit), d2-02 (Lower Limit), or b5-91 (EZ Sleep Minimum Speed) values if applicable. PID Offset Set parameter b5-07 to the desired PID output offset as a percentage of the maximum frequency. This will "shift" the maximum and minimum PID output (monitor U5-03) levels.
If desiring both a negative PID output limit and a positive PID output limit, follow the steps below.
Note: Monitor U5-03 can be used to view the PID Output while in operations. |
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FP605, GA800, GA800 Configured, GA500, HV600, HV600 Bypass, HV600 Configured, 1000 Series, |
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Last Modified Date: 07-22-2024![]() |
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