Mitsubishi FR - S500 instruction manual RS-485 communication, System configuration examples

(2) RS-485 communication

Use the RS-485 connector to perform communication operation from a personal computer etc.

By connecting the RS-485 connector to a computer such as a personal computer, Factory Automation unit (HMI etc.) or other computer, by the communication cable, you can operate/monitor the inverter and read/write the parameter values using user programs. For parameter setting, refer to page 116.

Conforming standard: EIA Standard RS-485

Transmission format: Multidrop link system

Communication speed: Max. 19200bps

Overall extension: 500m (1640.42feet)

<System configuration examples>

1) When a computer having a RS-485 interface is used with several inverters

Computer	Station 1	Station 2	Station n (Max. 32 inverters)
	Inverter	Inverter	Inverter

RS-485 interface /terminal

		RS-485	RS-485	RS-485
		connector	connector	connector
(*1)			(*1)	(*1)
Distribution
terminal					Termination
	10BASE-T cable (*2)				resistor

Use the connectors and cables which are available on the market.
Introduced products (as of June, 2000)
*1. Connector		:RJ45 connector
		Example: 5-554720-3, Tyco Electronics Corporation
*2. Cable		:Cable conforming to EIA568 (such as 10BASE-T cable)
		Example: SGLPEV 0.5mm ⋅			4P (Twisted pair cable, 4 pairs),
		Mitsubishi Cable Industries, Ltd.
		(Do not use pins No. 2 and 8 (P5S)).
2) When a computer having a RS-232C interface is used with inverters
	Computer			Station 1	Station 2	Station n
RS-232C				Inverter	Inverter	Inverter
				RS-485	RS-485	RS-485
connector
			Max. 15m connector		connector	connector
RS-232C
				(*1)	(*1)	(*1)
cable			Distribution
Converter*
			terminal
RS-485							Termination
			10BASE-T cable (*2)
terminal							resistor
Commercially available converter is required. (*3)

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