GW-7838-M (Modbus TCP Server to M-Bus Master Gateway) User Manual
Version 1.01
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2.2 DIP Switch
The GW-7838-M module provides 6-bit dip switches and the first two bits are used to change
operation mode. The following is an overview of the purpose and function of each dip switch
position together with a description. After changing the configuration of the DIP switch, the
GW-7838-M needs to reboot to enable the new setting.
1 (Init)
2 (Mode)
Description
OFF
OFF
Normal Work
ON
OFF
Firmware Update
OFF
ON
Configuration mode
ON
ON
Reserve
The DIP switch 3 ~ 6 are used to set RS-232 and M-Bus baud rate. The following is an overview
of the purpose and function of each dip switch position together with a description. After
changing the configuration of the DIP switch, the GW-7838-M needs to reboot to enable the new
setting.
3
4
5
6
M-Bus baud rate (bps)
OFF OFF OFF OFF 300
ON
OFF OFF OFF 600
OFF
ON
OFF OFF 1200
ON
ON
OFF OFF 2400
OFF OFF
ON
OFF 4800
ON
OFF
ON
OFF 9600
OFF
ON
ON
OFF 19200
ON
ON
ON
OFF 38400
OFF OFF OFF
ON 57600
ON
OFF OFF
ON 115200
Others
User-defined
Note: M-Bus only supports baud rate from 300 to 2400 bps.
Default M-Bus data format is 8, e, 1.
Default RS-232 data format is 8, n, 1.
