A&D SW-15KS, SW-6KS, SW-30KM, SW-60KL, SW-60KM, SW-150KM, SW-15KM manual Example of connection RS-422

Example of connection

RS-422	Terminator (may be
	built in the computer).
Host computer	RDA
	RDB
	SDA
	SDB
SW	SDA
Address 01	SDB
	RDA
	RDB
	TRM
SW	SDA
Address 02	SDB
	RDA
	RDB
	TRM

RS-485	Terminator (may be
	built in the computer).
Host computer
	A
	B
SW	SDA
Address 01	SDB
	RDA
	RDB
	TRM
SW	SDA
Address 02	SDB
	RDA
	RDB
	TRM

SW	SDA
Address 16	SDB
	RDA
	RDB
	TRM

SW	SDA
Address 16	SDB
	RDA
	RDB
	TRM

Connect TRM to RDB at the farthest SW from the host computer.

‰The polarity (A, B) of the host computer signal depends on the computer model. Check the technical manual of the computer.

Data format

The data format for the RS-422/485 is the same as the RS-232C except the following:

‰When used with the function setting “5if 1” (RS-422) or “5if 2” (RS-485), set a different address to each scale using the function setting “adr##”. ((##=01 to 99)

‰Start all commands with “@##” (## is the address of the scale to send a command). All replies from the scale start with “@##”.

The format after “@##” is the same as the RS-232C, both in commands and replies.

‰When used with the RS-485 interface (function setting: “5if 2”), note the following:

•When sending commands continuously, leave an interval of 500 ms or more between commands.

•Do not use stream mode (function setting: “prt 0”) when sending commands. Commands will not be received correctly and will be invalid.

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