Mitsubishi Electric FR-D720-0.2K-G Instruction Manual page 230

 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
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).
Pr. 934 < Pr. 935 (normal setting)
Reverse operation
Forward operation
PID output shutoff release
level
(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
increase
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 153.)
Analog Command (terminal 4)
(depending on Pr. 73, Pr. 267, and
voltage/current input switch)
0 to 5V input
0 to 10V input
0 to 20mA input
Parameters referred to
Pr. 59 Remote function selection
Pr. 73 Analog input selection
Pr. 79 Operation mode selection
Pr. 178 to Pr. 182 (input terminal function selection)
Pr. 190, Pr. 192 (output terminal function selection)
Pr. 561 PTC thermistor protection level
C2 (Pr. 902) to C7 (Pr. 905) Speed setting voltage (current) bias/gain
Pr. 935 PID display gain coefficient
>
Reverse operation
setting to Pr. 128
Forward operation
setting to Pr. 128
Pr. 577 - 1000
amount does not
in the reverse operation
Pr. 241 = 0 (initial value)
0 to 5V  0 to 100% (0.1%) display
0 to 10V  0 to 100% (0.1%) display
0 to 20mA  0 to 100%(0.1%) display
Refer to page 93.
Refer to page 147.
Refer to page 164.
Refer to page 117.
Refer to page 123.
Refer to page 101.
Special operation and speed control
Pr. 934  Pr. 935
Reverse operation
Forward operation
PID output shutoff release
level
500
Set point 400
Deviation +40
Measured value 360
100
0 to 100%  0 to 5V (0.01V) display
0 to 100%  0 to 10V (0.01V) display
0 to 100%  0 to 20mA (0.01mA) display
Refer to page 152.
Forward operation
setting to Pr. 128
Reverse operation
setting to Pr. 128
1000 - Pr. 577
0
20% 100%
(0%) (25%)(35%) (100%)
Deviation -10%
* ( ) indicates the deviation value
which the drive unit can
recognize
Pr. 241 = 1
4
227