Mitsubishi Electric FR-E720-600 Instruction Manual page 240

Special operation and frequency control
(5) PID automatic switchover control (Pr. 127)
The system can be started up without PID control only at a start.
When the frequency is set to Pr. 127 PID control automatic switchover frequency within the range 0 to 400Hz, the inverter
starts up without PID control from a start until output frequency is reached to the set frequency of Pr. 127, and then it shifts
to PID control. Once the system has entered PID control operation, it continues PID control if the output ferquency falls to
or below Pr.127.
Output frequency
Pr. 127
STF
PID
(6) PID monitor function
The PID control set point and measured value can be displayed on the operation panel and output from terminal AM.
The deviation monitor displays a negative value on the assumption that 1000 is 0%. (The deviation monitor cannot be
output from the terminal AM.)
For each monitor, set the following value in Pr. 52 DU/PU main display data selection and Pr. 158 AM terminal function selection.
Setting Monitor Description
52 PID set point
53 PID measured value
54 PID deviation value
238
Without
PID control
PID control
Minimum Terminal AM Full
Increments
0.1%
0.1%
0.1%
Scale
100%
100%
Value cannot be set to Pr. 158.
—
Displays 1000 when the PID deviation is 0%.
Time
Remarks
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