# Analog Input Compensation (pr. 73, Pr. 242, Pr. 243, Pr. 252, Pr. 253) - Mitsubishi Electric FR-F740 EC Instruction Manual

Fr-f700 series.

Parameter
6.15.2

## Analog input compensation (Pr. 73, Pr. 242, Pr. 243, Pr. 252, Pr. 253)

A fixed ratio of analog compensation (override) can be made by the added compensation or ter-
minal 2 as an auxiliary input for multi-speed operation or the speed setting signal (main speed)
of the terminal 2 or terminal 4.
Pr.
Name
No.
73
242
sation amount (terminal 2)
243
sation amount (terminal 4)
252
Override bias
253
Override gain
The above parameters can be set when Pr. 160 = 0.
Added compensation (Pr. 242, Pr. 243)
A compensation signal can be input to the main speed setting for synchronous/continuous
speed control operation, etc.
Setting any of "0 to 3, 6, 7, 10 to 13, 16, 17" in Pr. 73 adds the voltage across terminals 1-5 to
the voltage signal across terminals 2-5.
If the result of addition is negative, it is regarded as "0" at the Pr. 73 setting of any of "0 to 3, 6,
7", or reverse rotation operation (polarity reversible operation) is performed when the STF signal
turns on at the Pr. 73 setting of any of "10 to 13, 16, 17".
The compensation input of the terminal 1 can also be added to the multi-speed setting or ter-
minal 4 (initial value 0/4 to 20mA).
The added compensation for terminal 2 can be adjusted by Pr. 242, and the compensation for
terminal 4 by Pr. 243:
Analog command value using terminal terminal 2
Analog command value using terminal terminal 4
FR-F700 EC
Initial
Setting
Description
Value
Range
0–3/6/7/
10–13/
1
16/17
4/5/14/17
Override compensation
Set the ratio of added compensation
100%
0–100%
amount when terminal 2 is the main
speed.
Set the ratio of added compensation
75%
0–100%
amount when terminal 4 is the main
speed.
Set the bias side compensation value of
50%
0–200%
override function.
Set the gain side compensation value of
150%
0–200%
override function.
Forward rotation
Main
speed
Auxiliary input
0–±10V (±5V)
Fig. 6-115:
Inverter
=
Terminal 2 input
=
Terminal 4 input
Refer to
Parameters referred to
Section
28
Multi-speed input
6.5.3
compensation
selection
73
6.15.1
selection
Pr. 242
×
------------------- -
+
Terminal 1 input
100 [%]
Pr. 243
×
------------------- -
+
Terminal 1 input
100 [%]
I001186E
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