208
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).
The results of the above calibration are as shown below:
REMARKS
⋅ The frequency set in C5 (Pr. 904) and Pr. 126 should be the same as set in C2 (Pr. 902) and Pr. 125.
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. 22 Stall prevention operation level = "9999" (analog variable)
Pr. 79 Operation mode selection = "6" (switchover mode))
⋅ 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.
⋅ 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.
♦ Parameters referred to ♦
Pr. 59 Remote function selection Refer to page 89
Pr. 73 Analog input selection Refer to page 143
Pr. 79 Operation mode selection Refer to page 158
Pr. 178 to Pr. 189 (input terminal function selection) Refer to page 101
Pr. 190 to Pr. 196 (output terminal function selection) Refer to page 107
C2 (Pr. 902) to C7 (Pr. 905) Frequency setting voltage (current) bias/gain Refer to page 148
100
0
0
5
(V)
(%)
[Set point setting]
100
0
0
20
(mA)
(%)
[Detection value]
4
0
0
100
Deviation (%)
[Manipulated variable]
Manipulated variable (Hz)
60
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