44
Main speed setting
3.9.2
Main speed command by analog input
(1) Analog input gain selection (
Pr. 728 to Pr. 730,
X87 signal, X88 signal)
The gain of analog input for the main speed setting can be changed by X87 signal and X88 signal.
Set "87" in any of
Pr. 178 to Pr. 189 (input terminal function selection)
to assign X87 signal.
Set "88" in any of
Pr. 178 to Pr. 189 (input terminal function selection)
to assign X88 signal.
(2) Compensation input by terminal 4
(Pr. 785)
Main rotation speed is compensated when
Pr.785
= "1" (Terminal 4 input compensation).
All of main rotation speed commands are compensated with terminal 4.
(3) Override bias/gain
(Pr. 252, Pr. 253)
Extended range of override is available when override is selected in
Pr. 73
Analog input selection
.
Terminal input
Analog input gain
X87
X88
OFF
OFF
Gain frequency of the selected analog input terminal
ON
OFF
Main speed analog gain 2
(Pr. 728)
OFF
ON
Main speed analog gain 3
(Pr. 729)
ON
ON
Main speed analog gain 4
(Pr. 730)
Parameter
Number
Name
Setting Range
Increments
Initial Value
Remarks
785
Terminal 4 function
setting
1, 2, 9999
1
9999
1: Compensation input
2: Analog input signal for
taper setting
9999: Terminal 4 is disabled
Terminal 4 function
setting
(Pr.785)
Analog input
selection
(Pr.73)
Function
Terminal 4 function
Override
Polarity reversible
9999
—
No function
1
0
Additional compensation for frequency
command
1
2
3
4
Override signal
5
6
Additional compensation for frequency
command
7
10
11
12
13
14
Override signal
15
16
Additional compensation for frequency
command
17
Out of range
2
—
—
—
Analog input signal for taper setting
Parameter Number
Name
Setting Range
Increments
Initial Value
252
Override bias
0 to 1000%
0.1%
50%
253
Override gain
0 to 1000%
0.1%
150%
