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PID control
4
PARAMETERS
(5) PID control automatic switchover control (Pr. 127)
⋅ The inverter can be started up without PID control 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 without PID operation from a start until output frequency is reached Pr. 127, and then it shifts to
PID control operation mode. Once the system has entered PID control operation, it continues PID control if the
output frequency falls to or below Pr. 127.
(6) 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 FUP Signal, FDN Signal * Y48 Signal * SLEEP Function
0 (Initial value) Only signal output
Only signal output
Inverter coasts to a stop at the
start of SLEEP operation
1 Signal output + stop by fault (E.PID)
2 Only signal output
Signal output + stop by fault
(E.PID)
3 Signal output + stop by fault (E.PID)
10 Only signal output
Only signal output
Inverter decelerates to a stop at
the start of SLEEP operation
11 Signal output + stop by fault (E.PID)
12 Only signal output
Signal output + stop by fault
(E.PID)
13 Signal output + stop by fault (E.PID)
* 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.
Output frequency
P
r.127
STF
Time
PID
PID control
Without
PID control