Chapter 6: Programming Features
Firmware – S2011 and S3012
Revision: 1 (9/98) 41 © Saftronics, Inc.
6.3.5. Adjusting Frequency Upper and Lower Limits
Figure 24 Setting Frequency Upper and Lower Limits
§ Frequency Reference Upper Limit (n030)
Sets the upper limit of the frequency reference in units of 1%. (n012 Maximum output frequency: 100%) Factory
setting: 100%
§ Frequency Reference Lower Limit (n031)
Sets the lower limit of the frequency reference in units of 1%. (n012 Maximum output frequency: 100%)
When operating at a frequency reference of 0, operation is continued at the frequency reference lower limit.
However, when the frequency lower limit is set to less than the minimum output frequency (n017), operation is not
performed. Factory setting: 0%
6.3.6 Using Two Accel/Decel Times
* When deceleration to stop is selected (n004 = 0)
Figure 25 Timing Diagram of Accel/Decel Time Adjustment
By setting multi-function contact input selection (n035, n036, n037, n038 or n039) to “12 (accel/decel time
selection)”, accel/decel time is selected by turning ON/OFF the accel/decel time selection (Terminal S2, S3, S4, S5
or S6).
At OFF : n019 (accel time 1), n020 (decel time 1)
At ON : n021 (accel time 2), n022 (decel time 2)
Constant No. Name Unit Setting Range Factory Setting
n019 Accel time 1 0.1 s (1 s for 1000 s and above) 0.0 to 3600 s 10.0 s
n020 Decel time 1 0.1 s (1 s for 1000 s and above) 0.0 to 3600 s 10.0 s
n021 Accel time 2 0.1 s (1 s for 1000 s and above) 0.0 to 3600 s 10.0 s
n022 Decel time 2 0.1 s (1 s for 1000 s and above) 0.0 to 3600 s 10.0 s
• Accel time: Set the time needed for output frequency to reach 100% from 0%.
• Decel time: Set the time needed for output frequency to reach 0% from 100%.
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