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Mitsubishi Electric FR-A700 Instruction Manual Page 372

Fr-a700 series to 03460-na/09620-na/00330-n4/00170-n4.
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Special operation and frequency control
<Set point input calibration>
1. Apply the input voltage of 0% set point setting (e.g. 0V) across terminals 2-5.
2. Enter in C2 (Pr. 902) the frequency which should be output by the inverter at the deviation of 0% (e.g. 0Hz).
3. In C3 (Pr. 902), set the voltage value at 0%.
4. Apply the voltage of 100% set point (e.g. 5V) to across terminals 2-5.
5. Enter in Pr. 125 the frequency which should be output by the inverter at the deviation of 100% (e.g. 60Hz).
6. In C4 (Pr. 903), set the voltage value at 100%.
<Detector output calibration>
1. Apply the output current of 0% detector setting (e.g. 4mA) across terminals 4-5.
2. Make calibration using C6 (Pr. 904).
3. Apply the output current of 100% detector setting (e.g. 20mA) across terminals 4-5.
4. Make calibration using C7 (Pr. 905).
REMARKS
⋅ The frequency set in C5 (Pr. 904) and Pr. 126 should be the same as set in C2 (Pr. 902) and Pr. 125.
The results of the above calibration are as shown below:
[Set point setting]
(%)
100
0
0
CAUTION
⋅ If the multi-speed (RH, RM, RL signal) or jog operation (jog signal) is entered with the X14 signal on, PID control is stopped and
multi-speed or jog operation is started.
⋅ If the setting is as follows, PID control becomes invalid.
Pr. 79 Operation mode selection = "6" (switchover mode)
Pr. 858 Terminal 4 function assignment, Pr. 868 Terminal 1 function assignment = "4" (torque command)
⋅ When the Pr. 128 setting is "20" or "21", note that the input across inverter terminals 1-5 is added to the set value across terminals 2-5.
⋅ When using terminal 4 (measured value input) and terminal 1 (deviation input) under PID control, set "0" (initial value) in Pr. 858
Terminal 4 function assignment and "0" (initial value) in Pr. 868 Terminal 1 function assignment.
⋅ Changing the terminal function using any of Pr. 178 to Pr. 189, Pr. 190 to Pr. 196 may affect the other functions. Please make
setting after confirming the function of each terminal.
⋅ When PID control is selected, the minimum frequency is the frequency set in Pr. 902 and the maximum frequency is the
frequency set in Pr. 903. (Pr. 1 Maximum frequency and Pr. 2 Minimum frequency settings are also valid.)
⋅ The remote operation function is invalid during PID operation.
⋅ When the control is switched to PID control during
normal operation, the frequency command value
calculated by PID operation using 0Hz as standard is
used without the frequency during the operation.
♦ Parameters referred to ♦
Pr. 59 Remote function selection
Pr. 73 Analog input selection
Pr. 79 Operation mode selection
Pr. 178 to Pr. 189 (input terminal function selection)
Pr. 190 to Pr. 196 (output terminal function selection)
C2 (Pr. 902) to C7 (Pr. 905) Frequency setting voltage (current) bias/gain
362
[Detection value]
(%)
100
0
(V)
5
0
4
Refer to page 170
Refer to page 282
Refer to page 308
Refer to page 228
Refer to page 236
Manipulated variable (Hz)
(mA)
20
Frequency
command
PID action
Normal operation
Operation when control is switched to PID control during normal operation
Refer to page 289
[Manipulated variable]
60
0
0
100
Deviation (%)
PID set point
Frequency command
during normal operation
ON
PID operation
Normal operation

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