Page 134 Accumass BW500 PL-565
Communication
Example Setup
For a typical dial-up modem, try the following setup as a first attempt:
Master
Modem
• auto answer off (dip switch?)
• load factory default (dip switch?)
• no flow control (dip switch?)
• baud rate = 9600
• 10 data bits (probably the default)
Modbus RTU Software
• baud rate = 9600
• 8 bit
• no parity
• 1 stop bit
• dial prefix: ATDT
• Initialization command: ATE0Q0V1X05=0512=100
• Reset command: ATZ
• Hang-up command: ATHO
• Command response delay: 5 seconds
• Answer Delay: 30 seconds
• Inter-character delay: 55 ms
Slave
Modem
• auto answer on (dip switch?)
• load factory default (dip switch?)
• no flow control (dip switch?)
• baud rate = 9600
• 10 data bits (probably the default)
BW500
• set P770, port 1, to the value 3 (Modbus RTU)
• set P771, port 1, to the value 1 (Network ID 1)
• set P772, port 1, to the value 3 (Baud rate of 9600)
• set P773, port 1, to the value 0 (No Parity)
• set P774, port 1, to the value 8 (8 Data Bits)
• set P775, port 1, to the value 1 (1 Stop Bit)
• set P778, port 1, to the value 1 (Communications through Modem)
• set P779, port 1, to the value 300 (Modem Inactivity of 300 seconds)
Note:
The meaning of these parameters are outlined in the Installation section
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