Mitsubishi Electric 800 Series Instruction Manual page 413

• Calibrating set point input
(Example: To enter the set point on terminal 2)
1.
Apply the input (for example, 0 V) of set point setting 0% across terminals 2 and 5.
2.
Using Pr.902, enter the frequency (for example, 0 Hz) to be output by the inverter when the deviation is 0%.
3.
Using Pr.902, set the voltage value at 0%.
4.
Apply the input (for example, 5 V) of set point setting 100% across terminals 2 and 5.
5.
Using Pr.125 (Pr.903), enter the frequency (for example, 60 Hz) to be output by the inverter when the deviation is
100%.
6.
Using Pr.903, set the voltage value at 100%.
NOTE
• When the set point is set at Pr.133, the setting frequency of Pr.902 is equivalent to 0% and the setting frequency of Pr.903
is equivalent to 100%.
• Calibrating measured value input
1.
Apply the input (for example, 4 mA) of measured value 0% across terminals 4 and 5.
2.
Perform calibration by Pr.904.
3.
Apply the input (for example, 20 mA) of measured value 100% across terminals 4 and 5.
4.
Perform calibration by Pr.905.
NOTE
• Set the frequencies set at Pr.904 and Pr.126 (Pr.905) to each of the same values set at Pr.902 and Pr.125 (Pr.903).
• The display unit for analog input can be changed from "%" to "V" or "mA". (Refer to
• The figure below shows the results of having performed the calibration above.
[Set point setting]
(%)
100
0
0
 Setting multiple PID functions
• When the second PID function is set, two sets of PID functions can be switched for use. The PID setting is selected as
shown in the table below.
Pr.128 setting (First PID setting)
"0" or not applied to the frequency
"0" or not applied to the frequency
Applied to the frequency
Applied to the frequency
*1 While Pr.155 = "0", the second function is enabled immediately after RT signal turns ON. While Pr.155 = "10", the second function is enabled
only during constant speed operation when RT signal turns ON. (Refer to
412
5. PARAMETERS
5.11 (A) Application parameters
[Measured value]
(%)
100
0
(V)
0 4
5
Pr.753 setting (Second PID
setting)
"0" or not applied to the frequency
Applied to the frequency
"0" or not applied to the frequency
Applied to the frequency
[Manipulated variable]
Manipulated variable (Hz)
60
0
(mA)
20
0
Pr.155 RT signal
*1
setting
― ―
― ―
― ―
0 OFF
ON
10 ―
page 348 for the details.)
page 330.)
100 Deviation (%)
PID setting applied to the
output frequency
Control other than PID control
Second PID setting
First PID setting
First PID setting
Second PID setting
First PID setting