204
Special operation and speed control
(5) PID automatic switchover control (Pr. 127)
The system can be started up without PID control only at a start.
When the speed is set to Pr. 127 PID control automatic switchover speed, the drive unit starts up without PID control from a
start until rotation speed is reached to the set speed of Pr. 127, and then it shifts to PID control. Once the system has
entered PID control operation, it continues PID control even if the rotation speed 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).
NOTE
Changing the terminal function using any of Pr. 178 to Pr. 182, Pr. 190, Pr. 192, and Pr. 197 may affect the other functions.
Set parameters after confirming the function of each terminal.
When the Pr. 267 setting was changed, check the voltage/current input switch setting. Different setting may cause a
fault, failure or malfunction. (Refer to page 130 for setting)
Make sure to perform calibration after changing the voltage/current input signal assigned to the terminal 4 with
Pr. 267 setting and the voltage/current input switchover.
Pr. 554 Setting FUP Signal, FDN Signal * Y48 Signal * SLEEP Function
0 (Initial value) Only signal output
Only signal output
Drive unit 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
Drive unit 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.
Rotation speed
r. 127
STF
Time
PID
Without
PID control
PID control
