Siemens Milltronics BW500, Operating Instructions Manual

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Communications
11.3 Configuring Communication Ports
BW500 and BW500/L
128
Operating Instructions, 12/2016, A5E33482052-AD
11.3.2 P771 Protocol address
Note
Applicable only to ports programmed for Modbus RTU or Modbus ASCII (P770).
The unique identifier of the BW500 and BW500/L on the network for the selected port, ports 1 to
3 (P771-01 to -03).
For devices connected with the Siemens Milltronics protocol this parameter is ignored. For
devices connected with a serial Modbus protocol this parameter is a number from 1- 247. It is up
to the network administrator to ensure that all devices on the network have unique addresses.
Do not use the value “0” for Modbus communications as this is the broadcast address and is
inappropriate for a slave device.
Values
0 to 9999 (
f
= 1)
11.3.3 P772 Baud Rate
The communication rate with the master device for the selected port, ports 1 to 3 (P772- 01 to –
03).
The baud rate chosen should reflect the speed of the connected hardware and protocol used.
Values
1
f (01 and 02)
4800 baud
2 9600 baud
3
f (03)
19,200 baud
11.3.4 P773 Parity
The serial port parity for the selected port, ports 1 to 3 (P773-01 to –03).
Ensure that the communications parameters are identical between the BW500 and BW500/L
and all connected devices.
For example many modems default to N-8-1 which is: No parity, 8 data bits, and 1 stop bit.
Values
0
f
none
1 even
2 odd