Specifications

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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