Chapter 4: AC Drive Parameters
Page 4–83
DURApulse GS4 AC Drive User Manual – 1st Ed, Rev A - 10/20/2017
Type Hex Addr Dec Addr
P3.39 Increase/Decrease Speed Mode
♦R/W 0327 40808
Range/Units (Format: 16-bit unsigned) Default
0�000 : External Up/Down Terminal used for frequency change
follows Accel/Decel Time (P1�01 & P1�02)
0�001 ~1�000 Hz/ms: External Up/Down Terminal used for
frequency change follows constant speed
0
P3.39 adjusts the rate for the Frequency Up/Down Commands when Multi-Function Input
Terminals are set to 19 or 20 (Digital Freq Up/Down Commands). If P3.39 = 0.000, the Frequency
Up/Down Commands follow the Accel/Decel Time (P1.01 & P1.02). Any setting higher than 0.000
would be the constant speed rate value in P3.39.
Before using this function, set 1st or 2nd Source of Frequency Command equal to External Up/
Down Terminal (P4.00 or P4.01 = 3).
•
When P3�39 is set to 0�00, activate the external terminal Up/Down input to increase/decrease the
frequency command according to the system ramps (P1�01 & P1�02)�
•
When P3�39 is set >0, activate the external terminal Up/Down input to increase/decrease the
frequency command (F) in a linear rate according to the value in P3�39�
Frequency
Command
Time
ON OFF
Increased by
acceleration
time
Multi-function input
terminal configured to
NOTE: If P3.39>0 and if the UP/DOWN acc/dec P3.39 is faster than the actual drive acc/dec
(P1.01 and P1.02), the command frequency will reach desired speed well before the drive output
reaches setpoint.
Type Hex Addr Dec Addr
P3.40 DI6 Counter Debounce Filter
♦R/W 0328 40809
Range/Units (Format: 16-bit unsigned) Default
00�00~30�00 sec
00�02
When Digital Input 6 (DI6) is configured for Incremental Counter (P3.08 setting 23), mechanical
debounce can be adjusted using P3.40.
•
If the counter is a mechanical switch with a lot of jitter during transitions, the debounce time
should be increased�
•
Debounce time will be applied to both rising and falling edges of the trigger�
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