Manual Weighing Controller A 810
A.S.T. Angewandte SYSTEM-TECHNIK GmbH Dresden
Page
87
4.6. Examples of Communication Interfaces
4.6.1. RS-485 Interface
Note: Connection “D(Y)” has the same term as Tx+, D(A), SD(A);
Connection “D(Z)” has the same term as Tx-, D(B), SD(B);
Connection “R(A)” has the same term as Rx+, RD(A);
Connection “R(B)” has the same term as Rx-, RD(B);
- Direct connection
- Multipoint connection
- How to communicate
1. Set the Address ID for each A810
2. Change PC-port of A810 to “0” (Submenu PC-Interface “PC” at page 50)
3. Send ADDRESS command from host
Æ
activated A810 will respond with ACK (0x06)
4. One A810 specified by host is open for communication
5. Format of communication commands are set up in Submenu PC-Interface “PC” at page 50
6. Communication is opened to specified A810 until ADDRESS command to another A810 is
sent