Basic setting Process controller function selection
By means of the following functions, the response of the inverter can be controlled when PID control is activated.
Parameter
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Address
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Name / setting range / [default setting]
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Information
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0x2631:045
(P400.45)
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Function list: Disable PID controller
(Function list: PID off)
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Assignment of a trigger for the "Disable PID controller" function.
Trigger = TRUE: If PID control is activated, ignore PID control and drive the motor in speed-controlled manner.
Trigger = FALSE: If PID control is activated, drive the motor with PID control.
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0
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Not connected
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No trigger assigned (trigger is constantly FALSE).
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0x2631:046
(P400.46)
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Function list: Set process controller output to 0
(Function list: PID output=0)
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Assignment of a trigger for the "Set process controller output to 0" function.
Trigger = TRUE: If PID control is activated, I component and the output of the PID controller are set to 0 and the internal control algorithm is stopped. The PID control remains active.
Trigger = FALSE: no action / deactivate function again.
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0
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Not connected
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No trigger assigned (trigger is constantly FALSE).
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0x2631:047
(P400.47)
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Function list: Inhibit process controller I-component
(Function list: PID-I inhibited)
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Assignment of a trigger for the "Inhibit process controller I-component" function.
Trigger = TRUE: If PID control is activated, the I component of the PID controller is set to 0 and the integration process is stopped.
Trigger = FALSE: no action / deactivate function again.
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0
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Not connected
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No trigger assigned (trigger is constantly FALSE).
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0x2631:048
(P400.48)
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Function list: Activate PID influence ramp
(Function list: PID-Inf ramp on)
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Assignment of a trigger for the "Activate PID influence ramp" function.
Trigger = TRUE: the influence of the process controller is shown via a ramp.
Trigger = FALSE or not connected: the influence of the process controller is hidden via ramp.
Notes:
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The influence of the process controller is always active (not only when PID control is activated).
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Acceleration time for showing the influence of the process controller can be set in 0x404C:001 (P607.01).
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Deceleration time for hiding the influence of the process controller can be set in 0x404C:002 (P607.02).
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1
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Constant TRUE
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Trigger is constantly TRUE.
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Example for operating mode
In the following example, the "Disable PID controller" function is used to deactivate the PID control temporarily:
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As standard setpoint source, the frequency preset 1 is set to 20 Hz.
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Switch S1 starts the motor in the forward direction of rotation. Switch S1 in initial position stops the motor again.
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The switch S2 deactivates the PID control. The motor is then driven in a speed-controlled way.
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Connection diagram
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Function
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Switch S1
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Run
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Switch S2
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Disable PID controller
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Parameter
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Name
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Setting for this example
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Enable inverter
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Constant TRUE [1]
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Run
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Digital input 1 [11]
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Reset fault
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Not connected [0]
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Disable PID controller
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Digital input 2 [12]
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Control selection
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Flexible I/O configuration [0]
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Stop method
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Standard ramp [1]
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Frequency control: Default setpoint source
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Frequency preset 1 [11]
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Frequency setpoint presets: Preset 1
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20 Hz
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Maximum frequency
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50 Hz
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The example assumes that the process controller has been configured accordingly. Basic setting
Basic setting |
The status signals can be assigned to digital outputs.
 Configure digital outputs |
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①
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PID control is deactivated: a changeover is initiated from the configured PID control to speed-controlled operation.
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②
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PID control is activated again: a changeover is initiated from speed-controlled operation back to the configured PID control.
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