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8 PARAMETER FUNCTIONS
8-20
Initial value
Pr. 28 "contact input speed compensation" 0
Using the analog speed command, you can compensate for (increment/decrement) the speed set
by the contact input provided with the multi-speed setting or remote setting function.
Setting Function
0 Without speed compensation
1 With speed compensation
1) A given speed is added to the corresponding speed for compensation.
Set any of 0 to 3 in Pr. 73 [Section 8.3.1]. Enter the speed compensation signal to the terminal 1.
The relationship between the input and compensation values of the terminal 1 can be set in
Pr. 902 and Pr. 903 [Section 8.3.1].
-10
(-5)
10(V)
(5)
2000
-2000
0
Input of terminal 1
Compensation value (r/min)
Factory setting
When multi-speed operation (3 speeds) is performed with the input of 1V (compensation value
200r/min) to the terminal 1 (three-speed settings: high speed 1500r/min, middle speed 800r/min,
low speed 300r/min)
1700
1000
500
Time
Motor speed
(r/min)
High
speed
Middle
speed
Low
speed
MEMO
The stop command is given if the polarity of the speed compensation value is
negative as a result of compensation. To reverse the rotation with a negative speed
command value, set any of 10 to 13 in Pr. 73.
2) The corresponding speed is overridden at a given ratio for compensation.
Set 4 or 5 in Pr. 73. Enter the speed compensation signal into the terminal 2.
The relationship between the input and compensation values of the terminal 2 can be set in
Pr. 252 and Pr. 253 [Section 8.3.1].