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SITRANS RD500 – OPERATING INSTRUCTIONS
7ML19985MA01
AppendixA:
Input Modules
Modbus and Siemens Instruments
Modbus
SITRANS LU with SmartLinx®Modbus RTU Card
SmartLinx Modbus RTU Card port configuration (for RS-485 transmission):
Port 1 setup parameters:
Parameter
Description
P751 = 3
baud rate selectable
P752 = 0
no parity
P753 = 1
address 1 to 247
P758 = 0
interframe spacing = 0 ms
Bus termination resistors to be 120R.
Recommended cable is Belden 9842.
ON
1
8