Mitsubishi Electric FR-A800 Series Instruction Manual page 614

NOTE
• When the set point is set at Pr.133, the setting frequency of C2 (Pr.902) is equivalent to 0% and the setting frequency of Pr.125
(Pr.903) is equivalent to 100%.
• Measured value input calibration
1.
Apply the input (for example, 4 mA) of measured value 0% across terminals 4 and 5.
2.
Perform calibration by C6 (Pr.904).
3.
Apply the input (for example, 20 mA) of measured value 100% across terminals 4 and 5.
4.
Perform calibration by C7 (Pr.905).
NOTE
• Set the frequencies set at C5 (Pr.904) and Pr.126 to each of the same values set at C2 (Pr.902) and Pr.125.
• The display unit for analog input can be changed from "%" to "V" or "mA". (Refer to
• The following figure 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 following table.
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
Dancer control
*1 While Pr.155 = "0", the second function is enabled immediately after the RT signal turns ON. While Pr.155 = "10", the second function is enabled
only during constant speed operation when the RT signal turns ON. (For the details, refer to
*2 When dancer control is selected, the setting is not applied to the frequency.
Downloaded from ManualsNet.com
(%)
100
(V)
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
Not applied to the frequency
search engine
[Measured value]
0
(mA)
0 4 20
*1
Pr.155 setting
—
—
—
0
10
—
*2
page 507.)
[Manipulated variable]
Manipulated variable (Hz)
60
0
0 100 Deviation (%)
PID setting applied to the output
RT signal
frequency
— Control other than PID control
— Second PID setting
— First PID setting
OFF First PID setting
ON Second PID setting
— First PID setting
— Dancer control
page 525.)
5. PARAMETERS
5.14 (A) Application parameters
1
2
3
4
5
6
7
8
9
10
613