Mitsubishi Electric FR-A820-00046 Instruction Manual page 725

Parameters
Example Set the following:
Pr. 934 = "500", 20% (4 mA is applied), Pr. 935 = "100", 100% (20 mA is applied).
When the set point=400 and the measured value = 360, the deviation is +40 (>0), but the inverter
recognizes the deviation as –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".
Deviation
* ( ) indicates the deviation value
which the inverter can recognize
● The display of the following parameters is changed according to the C42 (Pr. 934)), C44 (Pr. 935),
Pr. 1136, and Pr. 1138 settings.
Pr.
131
132
133
553
577
761
763
Tab. 5-231: Influence of C42 (Pr. 934)), C44 (Pr. 935), Pr. 1136, and Pr. 1138 on other parameter displays
FR-A800
500
Set point 400
+40
Measured value
360
100
0
Name
PID upper limit
PID lower limit
PID action set point
PID deviation limit
Output interruption cancel level
Pre-charge ending level
Pre-charge upper detection level
20% 100%
(0%) (25%) (35%) (100%)
Deviation –10 %
Pr.
1143
1144
755
1145
1149
766
768
(A) Application parameters
Name
Second PID upper limit
Second PID lower limit
Second PID action set point
Second PID deviation limit
Second output interruption cancel level
Second pre-charge ending level
Second pre-charge upper detection level
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