Automation Direct DURApulse GS4 User Manual page 238

Chapter 4: AC Drive Parameters
Setting 1: Constant carrier frequency
The carrier frequency is fixed and will not change. The drive will not adjust the PWM carrier
frequency; it will only shorten the OL trigger time. The OL time at any point along the curve is for
one minute.
Example: Refer to the previous diagram for the current derating percent.
• GS4-41P0 drive set for normal duty�
The carrier frequency is a constant 15kHz resulting in the rated current being decreased to 72%.
The drive will activate OL protection when the current is (120%)(72%) = 86% for one minute.
Setting 2: Constant rated current
The protection method and current reduction actions are the same as setting 0, except that the
drive implements the (% of P0.01)(160% of output current) for normal duty, and the (% of P0.01)
(130% of output current) for light duty.
The advantage is that the drive can provide higher output current due to a higher current limit
than the factory setting according to the carrier frequency curve. The disadvantage is that the
drive decreases the carrier frequency quicker and more often when sensing an overload.
NOTE: Air flow, ventilation, and temperature derating information can be found in Chapter 1:
Getting Started and Chapter 2: Installation and Wiring.
NOTE: Additional carrier frequency derating information can be found in Chapter 1: Getting
Started.
NOTE: Use this parameter (P6.33) for frequency derating of the GS4 drive when P2.10 (PWM
Carrier Frequency) is higher than the factory setting.
NOTE: Refer to P2.10 and P6.34. When setting P6.34 the value in P2.10 changes.
P6.34 Variable/Constant Torque Duty Selection
Range/Units (Format: 16-bit binary)
0: VT, 3-phase input (light duty)
1: CT, 3-phase input (normal duty)
2: CT, 230V 1-phase input (normal duty)
• When working with P6�33 (Drive Derating Method), and P6�34 (VT/CT Duty Selection), refer to
P2�10 (PWM Carrier Frequency) for the carrier frequency setting� When P6�34 is set, it will change
P2�10� P6�00/P6�02 (Electronic Termal O/L Relay) must be set independently�
• Refer to model# specifications (P9�42 & P9�33) for the drive model and rated current�
Setting 0: VT, 3-phase input (light duty)
When the output current is 110% of the rated output current, the maximum run time is 60
seconds. When the output current is 130% of the rated output current, the maximum run time is 3
seconds.
Settings 1 & 2: CT (normal duty)
When the output current is 120% of the rated output current, the maximum run time is 60
seconds. When the output current is 160% of the rated output current, the maximum run time is 3
seconds.
NOTE: When P6.34 is set, it can change P2.10 (PWM Carrier Frequency); refer to P2.10.
Page 4–144
DURA
GS4 AC Drive User Manual – 1st Ed, Rev A - 10/20/2017
pulse
Type Hex Addr Dec Addr
♦R/W 0622 41571
Default
0