Mitsubishi Electric 800 Series Instruction Manual page 324

5.9.3 Analog input compensation
Addition compensation or fixed ratio analog compensation (override) with terminal 2 set to auxiliary input is applicable to the
multi-speed operation or terminal 2/terminal 4 speed setting signal (main speed).
Pr. Name
73 Analog input selection
T000
242 Terminal 1 added
T021 compensation amount
(terminal 2)
243 Terminal 1 added
T041 compensation amount
(terminal 4)
252 Override bias
T050
253 Override gain
T051
 Addition compensation (Pr.242, Pr.243)
• Example of addition compensation connection
Forward
Inverter
rotation
STF
SD
10
2
5
Auxiliary input 1
0 to 10 V ( 5 V)
• A compensation signal is addable to the main speed setting for such as synchronous or continuous speed control
operation.
• Setting a value of "0 to 3, 6, 7, 10 to 13, 16, and 17" to Pr.73 adds the voltage between terminals 1 and 5 to the voltage
signal of the terminals 2 and 5.
• When Pr.73= "0 to 3, 6, or 7", and if the result of addition is negative, it is regarded as 0 and the operation is stopped. When
Pr.73 = "10 to 13, 16, or 17", the operation is reversed (polarity reversible operation) with STF signal ON.
• The terminal 1 compensation input is addable to the multi-speed setting or terminal 4 (initial value: 4 to 20 mA).
• The degree of addition compensation to terminal 2 is adjustable with Pr.242. The degree of addition compensation 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 ×
Initial value Setting range
1 0 to 3, 6, 7, 10 to 13, 16, 17
4, 5, 14, 15
100% 0 to 100%
75% 0 to 100%
50% 0 to 200%
150% 0 to 200%
Description
Addition compensation
Override compensation
Set the percentage of addition
compensation when terminal 2 is set to
the main speed.
Set the percentage of addition
compensation when terminal 4 is set to
the main speed.
Set the percentage of override function
bias side compensation.
Set the percentage of override function
gain side compensation.
Pr.242
100(%)
Pr.243
100(%)
5. PARAMETERS
5.9 (T) Multi-Function Input Terminal Parameters
3
4
5
5
5
6
7
8
9
10
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