Endress+Hauser Liquiline CM44 series - 4 Commissioning; Modbus RS485

SD01189C/07/EN/04.17
Endress+Hauser
13
4 Commissioning
4.1 Modbus RS485
The parameters are located in Setup/General settings/Extended setup/Modbus/Settings.
Parameter
Default value
Selection
Bus address
247
1 … 247
Transmission Mode
RTU
RTU, ASCII
Baudrate
19200
1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200
Parity
Even (1 Stopbit)
Even (1 Stopbit), Odd (1 Stopbit), None (1 Stoppbit), None
(2 Stoppbit)
Byte order
1-0-3-2
1-0-3-2, 1-0-2-3, 2-3-0-1, 3-2-1-0
Watchdog
5 s
0 … 999, 0 = Watchdog is deactivated.
If the device does not receive a valid MODBUS request
telegram, a diagnostic code S969 (Modbus Watchdog) and
the red BF LED are set. The next valid Modbus request will
remove this diagnose.
The setting of the bus address with the Address-Switch of the module has priority over the menu setting. If
a valid address is set, the bus address in the menu is read only.
Valid bus addresses are between 1 and 247. If you configure an invalid address, software addressing is
automatically enabled via the onsite setting.