BAYKON MX08 - N-Bus Addressing; Modbus RTU Setup

MX08 Multichannel Weighing System, Technical Manual, Rev. 2.5 Page 54 of 144
RS-485 Serial interface
Usage
Interfacing with PC or PLC
Data formats
BSI (Refer to Section 3.11)
Modbus RTU High-Low (*) (Refer to Section 7.5)
Modbus RTU Low-High (Refer to Section 7.5)
Baud rate
1200 / 2400 / 4800 / 9600 (*) / 19200 / 38400 / 57600 bps
Length and parity
8 None 1 (*), 7 Odd 1, 7 Even 1
Start / Stop bits
1 start bit and 1stop bit
( * ) : Default
Warning: Connect the shield to the reference ground or shield pin of the power connector.
Warning: Disconnect xFace PC software for Modbus-RTU interfacing.
Power Supply Connection
The pin configuration of the 24 VDC power supply connector located on front bottom of the
instrument is shown in figure below. Proper grounding is very important for the accuracy
and the safety of your measuring system. Before interfering the instrument, please turn off
the power and wait at least for 30 seconds.
Warning: Connect the grounding terminal to the reference ground.
24V 0V
Figure 7.3 - Pin layout of MX08 MB 24 VDC connector
8.3. N-Bus Addressing
MX08 instruments communicate each other over internal data bus which is called N-Bus.
MX08 gateway instrument is master of N-Bus. All other instruments are slave and shall be
addressed to gateway.
N-Bus addressing can be done by using xFace PC software (refer to Section 3.3) or via
programming switch (refer to Section 3.9).
8.4. Modbus RTU Setup
MX08 gateway set up is done by xFace software as described in this section. Connect
MX08 MB instrument to your PC via RS-232C service port on the instrument as indicated
in Figure 7.2.
Select Gateway tab after connecting xFace to MX08 MB. Gateway tab is seen in figure
below. You will see the gateway information and Modbus-RTU parameters in this tab.