# Changing The Display Increment Of Numerical Values Used In Pid Control - Mitsubishi Electric FR-F820-00046 Instruction Manual

Fr-f800 series.

5.11.8 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 monitor
items related to PID control can be changed to various units.
Pr.
Name
759
PID unit selection
A600
C42(934)
PID display bias coefficient
*1
A630
C43(934)
PID display bias analog value
*1
A631
C44(935)
PID display gain coefficient
*1
A632
C45(935)
PID display gain analog value
*1
A633
1136
Second PID display bias
A670
coefficient
1137
Second PID display bias
A671
analog value
1138
Second PID display gain
A672
coefficient
1139
Second PID display gain
A673
analog value
1142
Second PID unit selection
A640
*1
The parameter number in parentheses is the one for use with 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 VDC, 0 to 10 VDC, or 4 to 20 mADC. (The
terminals used for measured value input can be selected at Pr.128, Pr.609, Pr.610.)
• 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).
• When both of C42 (Pr.934) and C44 (Pr.935) ≠"9999" and Pr.133 is set as the set point, the setting of C42 (Pr.934) is
treated as 0%, and C44 (Pr.935) as 100%.
Setting
Initial value
range
0 to 43
0
9999
0 to 500
9999
9999
20%
0 to 300%
0 to 500
9999
9999
100%
0 to 300%
0 to 500
9999
9999
20%
0 to 300%
0 to 500
9999
9999
100%
0 to 300%
0 to 43,
9999
9999
100
Bias
C42 (Pr.934)
0
20
0
4
Frequency setting signal
0
1
0
2
C43 (Pr.934)
Description
Change the unit of the PID control-related values that is
displayed on the LCD operation panel (FR-LU08) or the
parameter unit (FR-PU07).
Without display unit switching
Set the coefficient of the bias side (minimum) of measured value
input.
Displayed in %.
Set the converted % of the bias side (minimum) current/voltage
of measured value input.
Set the coefficient of the gain side (maximum) of measured value
input.
Displayed in %.
Set the converted % of the gain side (maximum) current/voltage
of measured value input.
Refer to C42(934).
Refer to C43(934).
Refer to C44(935).
Refer to C45(935).
Refer to Pr.759.
Initial value
Gain
C44 (Pr.935)
100%
20mA
5V
10V
C45 (Pr.935)
Second PID control
5. PARAMETERS
5.11 (A) Application parameters
1
2
3
4
5
6
7
8
9
10
423  