Chapter 6: Programming Features
Firmware – S2011 and S3012
Revision: 1 (9/98)
38
© Saftronics, Inc.
6.2.2.
Custom V/f Pattern
Set each pattern when using a special motor (high-speed motor, etc.) or when requiring special torque adjustment of
machine.
Make sure to satisfy the following
conditions for setting of constants
n012 to n018.
n017
<
n015
<
n014
<
n012
Figure 18
Custom V/f Pattern Setting
Constant No.
Name
Unit
Setting Range
Factory Setting
n012
Maximum output frequency
0.1 Hz
50.0
−
400.0 Hz
60.0 Hz
n013
Maximum voltage
0.1 V
0.1
−
255.0 V
[
200.0 V
[
n014
Maximum voltage output
frequency (base frequency)
0.1 Hz
0.2
−
400.0 Hz
60.0 Hz
n015
Middle output frequency
0.1 Hz
0.1
−
399.9 Hz
3.0 Hz
n016
Middle output frequency
voltage
0.1 V
0.1
−
255.0 V
[
15.0 V
[
n017
Minimum output frequency
0.1 Hz
0.1
−
10.0 Hz
1.5 Hz
n018
Minimum output frequency
voltage
0.1 V
0.1
−
50.0 V
[
10.0 V
[
∗
For 400 V class, the value is twice that of 200 V class.
Increasing the voltage of the V/f pattern increases motor torque, but an excessive increase may cause the following:
•
Inverter malfunction because of motor overexcitation.
•
Motor overheat or excessive vibration.
Increase voltage gradually while verifying the motor current.
6.3
Setting Operation Conditions
6.3.1.
Reverse Run Prohibit (n006)
“Reverse run disabled” setting does not accept a reverse RUN command from the control circuit terminal or Digital
Operator. This setting is used for applications where a reverse RUN command can cause problems.
Setting
Description
0
Reverse run enabled
1
Reverse run disabled
6.3.2.
Multi-Step Selection
By combining frequency reference and input terminal function selections, up to four steps of speed can be set.
Four step speed change
n002
=
1 (Operation mode selection)
n025
=
30.0 Hz
n026
=
40.0 Hz
n027
=
50.0 Hz
n028
=
60.0 Hz
n038
=
9 (Multi-function contact input Terminal S5)
n039
=
10 (Multi-function contact input Terminal S6)
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