Mitsubishi Electric 800 Series Instruction Manual page 422

5.11.8 Changing the display increment of the numerical values
used in PID control
When the operation panel or the parameter unit is used, the display unit of parameters and monitored items related to PID
control can be changed to various units.
Pr. Name
759 Operation mode selection
A600
934 PID display bias coefficient
A630
934 PID display bias analog
A631 value
935 PID display gain coefficient
A632
935 PID display gain analog
A633 value
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
 Calibration of PID display bias and gain (Pr.934 to Pr.935)
• When both Pr.934 and 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.
• Set the value that is displayed when the PID measured value (control amount) is 0% to Pr.934 and the value that is
displayed when the PID measured value (control amount) is 100% to Pr.935.
• When both of Pr.934 and Pr.935 "9999" and Pr.133 is set as the set point, the setting of Pr.934 is treated as 0%, and
Pr.935 as 100%.
Initial value Setting range
0 0 to 43
9999
9999 0 to 500
9999
20% 0 to 300%
9999 0 to 500
9999
100% 0 to 300%
9999 0 to 500
9999
20% 0 to 300%
9999 0 to 500
9999
100% 0 to 300%
9999 0 to 43, 9999
Initial value
100
Bias
Pr.934
0
20
0 4
Frequency setting signal
0 1
0 2
Pr.934
Description
Change the PID control-related display unit that is displayed
on the operation panel or the parameter unit.
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 Pr.934 Second PID control
Refer to Pr.934
Refer to Pr.935
Refer to Pr.935
Refer to Pr.759
Gain
Pr.935
100%
20 mA
5 V
10 V
Pr.935
5.11 (A) Application parameters
3
4
5
5
5
6
7
8
9
10
421
5. PARAMETERS