20-79 PID Autotuning
Option: Function:
This parameter starts the PID autotuning sequence. Once the autotuning
has successfully completed and the settings have been accepted or re-
jected by the user, by pressing [OK] or [Cancel] buttons on the keypad at
the end of tuning, this parameter is reset to [0] Disabled.
[0] * Disabled
[1] Enabled
This parameter group is used to configure the basic operation of the adjustable frequency drive’s PID controller,
including how it responds to a feedback that is above or below the setpoint, the speed at which it first starts
functioning, and when it will indicate that the system has reached the setpoint.
20-81 PID Normal/ Inverse Control
Option: Function:
[0] * Normal
Normal
[0] causes the adjustable frequency drive’s output frequency to
decrease when the feedback is greater than the setpoint reference. This
is common for pressure-controlled supply fan and pump applications.
[1] Inverse
Inverse
[1] causes the adjustable frequency drive’s output frequency to
increase when the feedback is greater than the setpoint reference. This
is common for temperature-controlled cooling applications, such as
cooling towers.
20-82 PID Start Speed [RPM]
Range: Function:
Applica-
tion de-
pend-
ent*
[Application dependant]
20-83 PID Start Speed [Hz]
Range: Function:
Applica-
tion de-
pend-
ent*
[Application dependant]
20-84 On Reference Bandwidth
Range: Function:
5 %* [0 - 200 %] When the difference between the feedback and the setpoint reference is
less than the value of this parameter, the adjustable frequency drive’s
display will show “Run on Reference”. This status can be communicated
externally by programming the function of a digital output for
Run on
Reference/No Warning
[8]. In addition, for serial communications, the On
Reference status bit of the adjustable frequency drive’s status word will
be high (1).
The
On Reference Bandwidth
is calculated as a percentage of the setpoint
reference.
TR200 Programming Guide 4-167
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