Mitsubishi Electric FR-F700PJ Instruction Manual page 266

Air-conditioning inverter
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Take caution when the following condition is satisfied because the inverter 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 inverter recognizes the
deviation with -10% (<0). Because of
this,
operation
increase
in
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 increments of the C3(Pr.902), C4(Pr.903), C6(Pr.904), and C7(Pr.905) are
also changed. (Refer to page 189)
Analog Command (Terminal 4)
(according to Pr. 73, Pr. 267, and
Voltage/Current Input Switch)
0 to 5V input
0 to 10V input
4 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. 261 Power failure stop selection
Pr. 561 PTC thermistor protection level
C2 (Pr. 902) to C7 (Pr. 905) Frequency 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
the
reverse
operation
Pr. 241 = 0 (Initial Value)
0 to 5V  displayed in 0 to 100%(0.1%).
0 to 10V  displayed in 0 to 100%(0.1%).
0 to 20mA  displayed in 0 to 100%(0.1%). 0 to 100%  displayed in 0 to 20mA(0.01mA).
Refer to page 110
Refer to page 183
Refer to page 200
Refer to page 134
Refer to page 140
Refer to page 168
Refer to page 119
Special operation and frequency control
Pr. 934
Reverse operation
Forward operation
PID output shutoff release
level
500
Set point
400
Deviation +40
Measured value
360
100
0 to 100%  displayed in 0 to 5V(0.01V).
0 to 100%  displayed in 0 to 10V(0.01V).
Refer to page 188
Pr. 935
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 inverter can
recognize
Pr. 241 = 1
4
261

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