Mitsubishi Electric FR-F800 Series Instruction Manual page 354

5.9.3
The analog input for multi-speed operation or speed setting (main speed) through terminal 2 or 4 can be compensated by
adding an input, or terminal 2 can be used for an auxiliary input to compensate the analog input at a fixed ratio using the
override function.
Pr.
73
Analog input selection
T000
Terminal 1 added
242
compensation amount
T021
(terminal 2)
Terminal 1 added
243
compensation amount
T041
(terminal 4)
252
Override bias
T050
253
Override gain
T051
 Compensation by addition (Pr.242, Pr.243)
Auxiliary input
0 to 10V( 5V)
Example of addition compensation connection
• A compensation signal can be added to the main speed setting for such as synchronous or continuous speed control
operation.
• Set "0 to 3, 6, 7, 10 to 13, 16, or 17" in Pr.73 to add the voltage determined by the terminal 1 input when the main speed
setting is input through terminal 2.
• When a negative voltage obtained from the addition, it is regarded as 0 and the operation is stopped when Pr.73 = "0 to
3, 6, or 7", and the operation is reversed (polarity reversible operation) after the STF signal is turned ON when Pr.73 = "10
to 13, 16, or 17".
• The terminal 1 compensation input can be added to the multi-speed setting or terminal 4 (initial value: 4 to 20 mA).
• The degree of addition to terminal 2 is adjustable with Pr.242 and the degree of addition to terminal 4 is adjustable with
Pr.243.
Analog command value with use of terminal 2 = terminal 2 input + terminal 1 input ×
Analog command value with use of terminal 4= terminal 4 input + terminal 1 input ×
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Analog input compensation
Name Initial value
1
100%
75%
50%
150%
Forward
Inverter
rotation
STF
SD
10
2
5
1
search engine
Setting range
0 to 3, 6, 7, 10 to 13, 16, 17 Compensation by addition
4, 5, 14, 15 Compensation using the override function
Set the percentage of addition when terminal 2
0% to 100%
is used to set the main speed.
Set the percentage of addition when terminal 4
0% to 100%
is used to set the main speed.
Set bias compensation for the override
0% to 200%
function.
Set gain compensation for the override
0% to 200%
function.
Pr.242
100(%)
Pr.243
100(%)
5.9 (T) Multi-function input terminal parameters
Description
353
5. PARAMETERS
1
2
3
4
5
6
7
8
9
10