Mitsubishi Electric FR-A800 Series Instruction Manual page 617

Pr.
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%.
• There are three methods to adjust the PID display bias/gain.
Method to adjust any point by application of a current (voltage) to the measured value input terminal
Method to adjust any point without application of a current (voltage) to the measured value input terminal
Method to adjust only the display coefficient without adjustment of current (voltage)
(Refer to page 505
as C44 (Pr.935).)
616
5. PARAMETERS
5.14 (A) Application parameters
Downloaded from ManualsNet.com
Name Initial value
0
9999
20%
9999
100%
9999
20%
9999
100%
9999
100
Bias
C42 (Pr.934)
0
0
0
0
C43 (Pr.934)
for details, and make the necessary adjustments by considering C7 (Pr.905) as C45 (Pr.935) and Pr.126
search engine
Setting
range
Change the unit of the PID control-related values that is
0 to 43 displayed on the LCD operation panel (FR-LU08) or the
parameter unit (FR-PU07).
9999 Without display unit switching
Set the coefficient of the bias side (minimum) of measured value
0 to 500
input.
9999 Displayed in %.
Set the converted % of the bias side (minimum) current/voltage
0 to 300%
of measured value input.
Set the coefficient of the gain side (maximum) of measured value
0 to 500
input.
9999 Displayed in %.
Set the converted % of the gain side (maximum) current/voltage
0 to 300%
of measured value input.
0 to 500
Refer to C42 (934).
9999
0 to 300% Refer to C43 (934).
0 to 500
Refer to C44 (935).
9999
0 to 300% Refer to C45 (935).
0 to 43,
Refer to Pr.759.
9999
Initial value
20 100%
4 20mA
Frequency setting signal
1 5V
2 10V
C45 (Pr.935)
Description
Second PID control
Gain
C44 (Pr.935)