Mitsubishi Electric FR-F740 EC Instruction Manual page 488

Fr-f700 series
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PID control
PID control automatic switchover control (Pr. 127)
For a fast system start-up at an operation start, the system can be started up in normal operation
mode only at a start.
When the frequency is set to Pr. 127 "PID control automatic switchover frequency" within the
range 0 to 400Hz, the system starts up in normal operation mode from a start until Pr. 127 is
reached, and then it shifts to PID control operation mode. Once the system has entered PID con-
trol operation, it continues PID control if the output frequency falls to or below Pr. 127.
Fig. 6-181: Automatic switchover to PID control
Selecting operation to be performed at the output of Upper limit signal, Lower limit signal,
and PID deviation limit signal (FUP signal, FDN signal, Y48 signal, Pr. 554)
You can select the operation to be performed at the detection of upper, lower and deviation limit
for the measured value input. With Pr. 554 PID signal operation selection, signal output or signal
output + alarm stop (E.PID) can be selected for each of upper limit output signal (FUP signal),
lower limit output signal (FDN signal), and PID deviation limit signal (Y48 signal).
Pr. 554 Setting
0 (initial value)
10
11
12
13
When the settings for Pr.131 PID upper limit, Pr.132 PID lower limit, and Pr.553 PID deviation
limit, which corresponds with FUP, FDN, and Y48 signals, are "9999" (no function), the signal
is not output, or the alarm stop is not performed.
6 - 338
Output frequency
Normal
operation
FUP Signal, FDN Signal
Only signal output
Signal output + stop by fault
1
(E.PID)
2
Only signal output
Signal output + stop by fault
3
(E.PID)
Only signal output
Signal output + stop by fault
(E.PID)
Only signal output
Signal output + stop by fault
(E.PID)
PID control
Y48 Signal
Only signal output
Signal output + stop by fault
(E.PID)
Only signal output
Signal output + stop by fault
(E.PID)
Parameter
Time
I001234E
SLEEP Function
Inverter coasts to a stop at the
start of SLEEP operation
Inverter decelerates to a stop
at the start of SLEEP
operation

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