Using only one separate communication option card, GA800, GA500, and HV600 drives can communicate with and control other drives through the built-in, Modbus RS-485 communications. This is referred to as Gateway Mode.

Note: A total of 5 drives (one master and four slaves) can be connected to the RS-485 field bus network.

The data that can be transmitted to the slave drives through the master drive using Gateway Mode on GA800, GA500 and HV600 drives is as follows:

• Control commands: Run command and frequency reference
• Control responses: Output frequency and drive status (during run, faults)
• Read and write parameters
• Read monitors

Wiring

Wire the drives according to the diagram below using the RS-485 terminals D+ and D- with AC being the signal ground.

Programming

Refer to the table below for the programming of the master and slave drives.

Drive	F6-16 (Gateway Mode)	H5-01 (Node Address)	H5-02 (Baud Rate)	H5-03 (Parity Selection)	H5-06 (Transmit Wait Time)	H5-09 (CE detect time)	B1-01 (Frequency Source)	B1-02 (Run Source)
Drive 0 (Master Drive)	1 - 4 (Number of Drives)	1F (Default)	3:9600 bps (Default) All drive must match settings.	0 : No Parity	5 ms	≥2.0 s	3 (Option PCB)	3 (Option PCB)
Drive 1 (Slave Drive)	0	01			5 ms	≥0.9 s	2 (Serial Com)	2 (Serial Com)
Drive 2 (Slave Drive)	0	02			5 ms	≥0.9 s	2 (Serial Com)	2 (Serial Com)
Drive 3 (Slave Drive)	0	03			5 ms	≥0.9 s	2 (Serial Com)	2 (Serial Com)
Drive 4 (Slave Drive)	0	04			5 ms	≥0.9 s	2 (Serial Com)	2 (Serial Com)