Mitsubishi Electric FR-A800, Instruction Manual

Page: 723 / 1042

Parameters (A) Application parameters
FR-A800 5 - 543
5.14.10 Changing the display increment of numerical values used in PID control
When the LCD operation panel (FR-LU08) or the parameter unit (FR-PU07) is used, the display unit of
parameters and monitored items related to PID control can be changed to various units.
The parameter number in parentheses is the one for use with the the LCD operation panel and the
parameter unit.
Calibration of PID display bias and gain(C42 (Pr. 934) to C45 (Pr. 935))
●
When both C42 (Pr. 934) and C44 (Pr. 935)
≠
"9999", the bias and gain values for the set point,
measured value and deviation in PID control can be calibrated.
●
"Bias"/"gain" function can adjust the relation between PID displayed coefficient and measured
value input signal that is externally input. Examples of these measured value input signals are 0
to 5 V DC, 0 to 10 V DC, or 4 to 2 mA DC.
●
Set the value that is displayed when the PID measured value (control amount) is 0% to C42 (Pr. 934)
and the value that is displayed when the PID measured value (control amount) is 100% to C44
(Pr. 935).
Pr. Name
Initial
value
Setting range Description
759
A600
Operation mode selection 0
0 to 43
Change the PID control-related display unit that is
displayed on the LCD operation panel (FR-LU08) or
the parameter unit (FR-PU07).
9999 Without display unit switching
C42
A630
(934)
PID display bias coefficient 9999
0 to 500
Set the coefficient of the bias side (minimum) of
measured value input.
9999 Displayed in %.
C43
A631
(934)
PID display bias analog
value
20% 0 to 300%
Set the converted % of the bias side (minimum)
current/voltage of measured value input.
C44
A632
(935)
PID display gain coefficient 9999
0 to 500
Set the coefficient of the gain side (maximum) of
measured value input.
9999 Displayed in %.
C45
A633
(935)
PID display gain analog
value
100% 0 to 300%
Set the converted % of the gain side (maximum)
current/voltage of measured value input.
1136
A670
Second PID display bias
coefficient
9999
0 to 500
Refer to C42(934)
Second PID control
9999
1137
A671
Second PID display bias
analog value
20% 0 to 300% Refer to C43(934)
1138
A672
Second PID display gain
coefficient
9999
0 to 500
Refer to C44(935)
9999
1139
A673
Second PID display gain
analog value
100% 0 to 300% Refer to C45(935)
1142
A640
Second PID unit selection 9999 0 to 43, 9999 Refer to Pr. 759