Mitsubishi Electric FR-A820-00046 Instruction Manual page 623

Parameters
Analog input bias/gain calibration (C2 (Pr. 902) to C7 (Pr. 905), C12 (Pr. 917) to C15 (Pr. 918))
● The "bias" and "gain" functions serve to adjust the relationship between a setting input signal and
the output frequency. A setting input signal is such as 0 to 5 V DC/0 to 10 V or 4 to 20 mA DC
externally input to set the output frequency.
● Set the terminal 2 input bias frequency by using C2 (Pr. 902).
(It is initially set to the frequency at 0 V.)
● Set the output frequency to the frequency command voltage (current) set by the Pr. 73 "Analog
input selection" by using Pr. 125.
● Set the bias frequency of the terminal 1 input using C12 (Pr. 917).
(It is initially set to the frequency at 0 V.)
● Set the gain frequency of the terminal 1 input using C14 (Pr. 918).
(It is initially set to the frequency at 10 V.)
● Set the bias frequency of the terminal 4 input using C5 (Pr. 904).
(It is initially set to the frequency at 4 mA.)
● Set the output frequency for 20 mA of the frequency command current (4 to 20 mA) by using Pr. 26.
Fig. 5-203:
FR-A800
60 Hz
(50 Hz)
Bias
C2
C12 (Pr. 917)
0
0
0
0
C3 (Pr. 902)
C13 (Pr. 917)
60 Hz
(50 Hz)
Bias
C5 (Pr. 904)
0
0
0
0
C6 (Pr. 904)
Signal adjustment of the terminals
(T) Multi-Function Input Terminal Parameters
Initial value
Frequency setting signal
Initial value
20
4
1
Frequency setting signal
2
Gain
Pr. 125
C14 (Pr. 918)
100 %
5 V
10 V
20 mA
C4 (Pr. 903)
C15 (Pr. 918)
Gain Pr. 126
100 %
20 mA
5 V
10 V
C7 (Pr. 905)
I002769E, I002431E
5 - 421