AutomationDirect DURAPULSE GS3-4030 - Page 102

Chapter 4: AC Drive Parameters
4–34
Setting 13: Speed Hold
When the Speed Hold command is received, the drive acceleration or
deceleration is stopped and the drive maintains a constant speed.
Settings 14 and 15: Increase and Decrease Speed
(Electronic Motor Operated Potentiometer)
Settings 14 and 15 allow the Multi-function terminals to be used to increase or
decrease speed. As long as the DI terminal is activated, the speed reference will
continuously increase or decrease using the acceleration and deceleration ramp
settings.
• Increase Speed rate of change = P0.04(Hz) / P1.01(s)
• Decrease Speed rate of change = P0.04(Hz) / P1.02(s)
• Example:
For P0.04 = 60Hz; P1.01 = P1.02 = 10s; rate of change = 60Hz/10s = 6Hz/s
• In order to use these settings, P4.00 must be set to 01.
• Accel / Decel times must be more than one second to work efficiently.
60Hz
Max Speed
Hz
10Hz
Initial Speed
22Hz
New Speed
Increase
Speed
Input
Accel
Time
s
10
2s
Speed Increase = (2s)(6Hz/s) = 12Hz
New Speed = 10Hz + 12Hz = 22Hz
60Hz
Max Speed
Hz
50Hz
Initial Speed
20Hz
New Speed
Decrease
Speed
Input
Decel
Time
s
10
5s
Speed Decrease = (5s)(6Hz/s) = 30Hz
New Speed = 50Hz - 30Hz = 20Hz
Actual Operation Freq.
Time
ON ONON
ON
ON
OFF
Master Frequency
Accel inhibit
Decel inhibit
Decel inhibit
Accel inhibit
Actual Operation Frequency
Frequency
Run
Command
Speed Hold
DURAPULSE AC Drive User Manual
1st Ed. Rev. D 05/2013