Ohaus RS422 Interface Option Kit Manual multi - Manual (Page 10)

EN-8 RS485 / RS422 Option Kit
3. OPERATION
Refer to the instruction manual supplied with indicator. Set up the RS485 / RS422
communication and printing parameters as described in the COM2 and PRINT2
menu sections. Send and receive data as described in the SERIAL COMMUNICATION
section.
3.1 Use of RS485 Addresses
The RS485 / RS422 interface option allows up to 99 unique addresses. The use of
scale addresses above the actual number of network connections allows for
simplified swapping of scales on an existing network. Scales may be swapped with
no risk of repeated addresses on a network. Multiple network systems could be
created with unique scale addresses to give absolute scale identification.
The address may be set to OFF to allow compatibility with RS422 point-to-point or
receive only multi-drop systems.
3.2 Sending Commands to the RS485 Interface
Commands sent to the RS485 interface must be preceded by the “@” character and
its two digit address set up in the COM2 menu. For example, to send a print
command to the RS485 interface that is setup as address 01, the user must send
the following sequence: “@01P”.
3.3 Receiving Data from the RS485 Interface
Each response from the RS485 interface is preceded by the @ character and the two
digit address. For example, a typical response to “@01P” would be “@01 10.005
kg”.