# Mitsubishi Electric FR-A820-00046 Instruction Manual Page 737

Parameters
● The following shows the relationship between the input values of the analog input terminals, and
the set point and measured value.
Input
terminal
Terminal 2
Terminal 1
Terminal 4
Tab. 5-238: Relationship between the analog input and the set point and measured value
Can be changed by Pr. 73 and Pr. 267 and the voltage/current input switch. (Refer to page 5-389.)
Selection of additive method for PID calculation result
When ratio is selected as the additive method (Pr. 128 = "42, 43"), PID calculation result × (ratio of main
speed) is added to the main speed.
The ratio is determined by the Pr. 125 "Terminal 2 frequency setting gain frequency" and C2 (Pr. 902)
"Terminal 2 frequency setting bias frequency" settings. In the initial status, 0 to 60 Hz is set for 0 to
100%. Thus, 60 Hz main speed is regarded as 100%, and the 30 Hz main speed is regarded as 50%.
Fig. 5-277:
NOTES
Even if C4 (Pr. 903) is set to other than 100%, the frequency setting signal is treated as 100%.
Even if C3 (Pr. 902) is set to other than 0%, the frequency setting signal is treated as 0%.
If C2 (Pr. 902) is set to other than 0 Hz, the frequency setting signal is 0% at the C2 (Pr. 902) fre-
quency setting or below.
FR-A800
Inspect
specification
Set point
0 V = 0%
0 to 5 V
5 V = 100%
0 V = 0%
0 to 10 V
10 V = 100%
0 mA = 0%
0 to 20 mA
20 mA = 100%
–5 V to 0 V = 0%
0 to ±5 V
5 V = +100%
–10 V to 0 V = 0%
0 to ±10V
10 V = +100%
0 V to 1 V = 0%
0 to 5 V
5 V = 100%
0 V to 2 V = 0%
0 to 10 V
10 V = 100%
0 to 4 mA = 0%
0 to 20 mA
20 mA = 100%
60 Hz
Bias
C2 (Pr. 902)
0
Signal calibration at terminal 2
Result
0 V = 0%
5 V = 100%
0 V = 0%
10 V = 100%
0 mA = 0%
20 mA = 100%
–5 V to 0 V = 0%
5 V = +100%
–10 V to 0 V = 0%
10 V = +100%
0 V to 1 V = 0%
5 V = 100%
0 V to 2 V = 0%
10 V = 100%
0 to 4 mA = 0%
20 mA = 100%
Initial value
100%
Frequency setting signal
(A) Application parameters
Calibration parameter
Pr. 125, C2 to C4
When Pr. 128 = "10"
Pr. 125, C2 to C4
When Pr. 128 ≥ "1000"
C12 to C15
Pr. 126, C5 to C7
Gain
Pr. 125
I002709E
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