A&D SW-15KS Benutzerhandbuch

Example of connection

RS-422 RS-485

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.

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

Host computer

RDA

RDB
SDA
SDB

SW SDA
Address 01

SDB

RDA
RDB
TRM

SW SDA
Address 02

SDB

RDA
RDB
TRM

SW SDA
Address 16

SDB

RDA
RDB
TRM

Terminator (may be
built in the computer).

Host computer

SW SDA
Address 01

SDB

RDA
RDB
TRM

SW SDA
Address 02

SDB

RDA
RDB
TRM

SW SDA
Address 16

SDB

RDA
RDB
TRM