P774 Data Bits; P775 Stop Bits; P778 Modem Attached - Siemens milltronics BW500 Instruction Manual

P774 Data bits

The number of data bits per character for the selected port, ports 1 to 3 (P774-01 to –03).:
Protocol
Modbus RTU
Modbus ASCII
Dolphin Plus
If using port 2, 8 data bits must be used.
Note:
Values
f
5 to 8 ( = 8)

P775 Stop bits

The number of bits between the data bits for the selected port, ports 1 to 3
P775-01 to -03).
Values
f
1 or 2 ( = 1)

P778 Modem attached

Sets port 1 (P778-01) to use an external modem.
Any connected modem must be set up to auto-answer incoming calls. The BW500 does
not automatically configure the modem.
Autobaud (enabled by P778=1)
When the BW500 is powered up or the P779 Modem Inactivity Timeout expires three
carriage returns are sent to the modem to allow it to set its serial connection to P772
Baud Rate.
If a connection is made with the modem at a different baud rate the BW500 will attempt
to use that rate instead of the P772 value. For troubleshooting purposes the baud rate on
the modem can be hard-coded to the rate set on the BW500. See your modem
documentation for information on fixing the baud rate.
Values
0 *no modem connected
1 modem connected
Page 80 Milltronics BW500 – INSTRUCTION MANUAL
P744 Value
8
7 or 8
7 or 8
7ML19985DK03