Changing The Display Increment Of Numerical Values Used In Pid Control - Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual

• During PID operation, the remote operation function is invalid.
• When control is switched to PID control during normal operation, the frequency during that operation is not carried over, and
the value resulting from PID calculation referenced to 0 Hz becomes the command frequency.
Parameters referred to
Pr.59 Remote function selectionpage 359
Pr.73 Analog input selectionpage 473
Pr.79 Operation mode selectionpage 370
Pr.178 to Pr.189 (Input terminal function
Pr.190 to Pr.196 (Output terminal function
Pr.290 Monitor negative output
C2 (Pr.902) to C7 (Pr.905) Frequency setting voltage (current)
5.14.11 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.
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.
584
5. PARAMETERS
5.14 (A) Application parameters
PID set point
Frequency
command
PID action
Normal operation
Operation when control is switched to PID control during normal operation
selection)page 496
selection)page 450
selectionpage 435
Name Initial value
0
9999
20%
9999
100%
9999
20%
9999
100%
9999
Frequency command
during normal operation
ON
PID operation Normal operation
bias/gainpage 482
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
Description
Second PID control