Page D–12
DuRApulse GS4 AC Drive User Manual – 1st Ed, Rev A - 10/20/2017
Appendix D: Using GS4 AC Drives with AutomationDirect PLCs
There are three command words to control the drive over serial Modbus. Toggling these bits and
setting the Frequency Command will control the drive.
Parameter Settings Table
MODBUS Address
Description Range
HEX Decimal
2000 48193
Bit 0~1
00: no function
01: Stop
10: Run
11: Jog+Run (at P5.00 Jog speed)
Bit 2~3 Reserved
Bit 4~5
00: no function
01: FWD
10: REV
11: no function
Bit 6~15 Reserved
2001* 48194* Frequency Command / PID Setpoint * In 1/100 of Hz (1500 = 15.00 Hz output)
2002 48195 External Fault Input
Bit 0: Trigger External Fault (EF)
Bit 1: Reset EF
Bit 2: External Interruption (B.B) = ON
Bits 3~15: Reserved
* For 2001h: When the GS4 drive is configured with Frequency Reference as RS-485, Modbus TCP,
or EtherNet/IP (P4.00=1 or 4 and drive in Remote/Auto) – OR – (P4.01=1 or 4 and drive in Local/
hand) – AND – Reference > P0.04 Max Output Freq, then the drive will go up to Max Freq where it
will remain until Max Freq is modified lower or a lower Freq Ref or a Stop signal is sent to the drive.
NOTE: The bits are edge triggered, meaning that you set them once and they will remain in
effect until another command changes operation. Example: if you send the Run command, the
drive will run. Clearing the Run bit will have no effect. You must send the Stop bit to make the
drive Stop.
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