210
Special operation and speed control
Take caution when the following condition is satisfied because the drive unit recognizes the deviation value as
a negative (positive) value even though a positive (negative) deviation is given:
Pr. 934 PID display bias coefficient
> Pr. 935 PID display gain coefficient
To perform a reverse operation, set the forward operation in Pr. 128 PID action selection. To perform a forward
operation, set the reverse operation in Pr. 128. In this case, the PID output shutoff release level is (1000 - Pr.
577).
(Example) Set the following: Pr. 934 = "500" and
20% (4mA is applied), Pr. 935 = "100"
and 100% (20mA is applied).
When the set point=400 and the
measured value=360, the deviation is
+40 (>0), but the drive unit recognizes
the deviation with -10% (<0). Because of
this, operation amount does not
increase in the reverse operation
setting.
The operation amount increases when
the forward operation is set.
To perform PID output shutoff release at
deviation of +40 or higher, set Pr. 577 =
"960."
(12) Analog input display unit changing (Pr. 241)
You can change the analog input display unit (%/V, mA) for analog input bias/gain calibration.
Depending on the terminal input specification set to Pr. 73, Pr. 267, and voltage/current input switch the display
units of C43(Pr. 934), C45(Pr. 935) change as shown below.
If the Pr.241 setting is changed, the units of C3(Pr.902), C4(Pr.903), C6(Pr.904), and C7(Pr.905) will change too.
(Refer to page 136)
Pr. 934 < Pr. 935 (normal setting) Pr. 934 ≥ Pr. 935
Reverse operation
Reverse operation
setting to Pr. 128
Reverse operation
Forward operation
setting to Pr. 128
Forward operation
Forward operation
setting to Pr. 128
Forward operation
Reverse operation
setting to Pr. 128
PID output shutoff release
level
Pr. 577 - 1000
PID output shutoff release
level
1000 - Pr. 577
Analog Command (terminal 4)
(depending on Pr. 73, Pr. 267, and
voltage/current input switch)
Pr. 241 = 0 (initial value) Pr. 241 = 1
0 to 5V input 0 to 5V 0 to 100% (0.1%) display 0 to 100% 0 to 5V (0.01V) display
0 to 10V input 0 to 10V 0 to 100% (0.1%) display 0 to 100% 0 to 10V (0.01V) display
0 to 20mA input 0 to 20mA 0 to 100%(0.1%) display 0 to 100% 0 to 20mA (0.01mA) display
Parameters referred to
Pr. 59 Remote function selection Refer to page 84
Pr. 73 Analog input selection
Refer to page 130
Pr. 79 Operation mode selection
Refer to page 147
Pr. 178 to Pr. 182 (input terminal function selection)
Refer to page 100
Pr. 190, Pr. 192 (output terminal function selection)
Refer to page 106
Pr. 561 PTC thermistor protection level
Refer to page 91
C2 (Pr. 902) to C7 (Pr. 905) Speed setting voltage (current) bias/gain
Refer to page 135
0
100%
500
20%
100
400
360
(0%)(25%)(35%) (100%)
Set point
Measured value
Deviation -10%
* ( ) indicates the deviation value
which the drive unit can
recognize
Deviation +40
