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Physical connections for modbus tcp -16 – Rockwell Automation AADvance Controller Configuration Guide User Manual

Page 202

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9-16

Document: 553633
ICSTT-RM405f-EN-P

Issue 07

Configuration Guide (AADvance Controller)


Serial Port Parameters

Each serial port on the AADvance controller supports the set of control parameters as

detailed in the table.

Table 24:

Controller Serial Port Parameters

Description

Value(s)

Default

Remarks

Baud

1,200; 2,400; 4,800;
9,600; 19,200; 38,400;
57,600; 76,800 or

115,200

19,200

Data Bits

5 to 8

8

Parity

None, Odd or Even

None

Stop Bits

1 or 2

1

Type

RS485fd

RS485fdmux
RS485hdmux

RS485hdmux

'fd' means 'full duplex'

'hd' means 'half duplex'

Note: Most systems use two bits after each data byte. The two bits are either a parity
bit (odd or even) and one stop bit, or no parity and two stop bits.

Physical Connections for Modbus TCP

Modbus master TCP communications use the Ethernet ports on the 9100 processor

base unit.

Setting up the Project for Modbus Master Operation

The top-level process to set up your project for Modbus Master operation consists of
the following tasks.
1) Insert the Modbus Master Bus
2) Create and configure a Modbus master object on a 9110 processor module
3) Create slave link objects for each Modbus slave device
4) Configure the slave link objects
5) Add further Modbus master objects and slave link objects as needed.
Before you begin the process, make sure you have the following information for each

Modbus slave device:

The Modbus protocol to use: Modbus RTU for serial links or Modbus TCP for

an Ethernet link.