Trane TR200 Programming Manual page 204

20-79 PID Autotuning
Option:
[0] * Disabled
[1] Enabled
20-8* PID Basic Settings
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:
[0] * Normal
[1] Inverse
20-82 PID Start Speed [RPM]
Range:
Applica- [Application dependant]
tion de-
pend-
ent*
20-83 PID Start Speed [Hz]
Range:
[Application dependant]
Applica-
tion de-
pend-
ent*
20-84 On Reference Bandwidth
Range:
5 %* [0 - 200 %]
TR200 Programming Guide
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.
Function:
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.
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.
Function:
Function:
Function:
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
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).
On Reference Bandwidth
The
reference.
Parameter Description
is calculated as a percentage of the setpoint
Run on
4-167