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Modbus nw (master) --- rtu / ascii mode, Nw (master) --- rtu / ascii mode – Delta Electronics Network Device DOP-A/AE/AS User Manual

Page 102

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Delta DOP Series HMI Connection Manual|DOP-A/AE/AS Series

Revision January, 2008, Doc. Name: 2007PDD23000007

1-101

Modbus nW (Master) --- RTU / ASCII mode

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A. HMI factory settings

Baud rate: 9600, 7, EVEN, 1. (ASCII)

9600, 8, EVEN, 1. (RTU)

Controller station number: 1.

Control area/status area: W40100 / W40200.

NOTE

1) This driver can read consecutive communication address on the screen via one Modbus command to

improve the communication efficiency. For example, if there are 6 devices on the screen, and read the

data of the addresses W40100, W40101, W40102, W40200, W40201, W40300. It will read three times.

It will read W40100 3 Words at the first time, read W40200 2 Words at the second time and read

W40300 1 Word at the third time.

2) Ensure to check the box next to “Optimize” (Optimization for reading) selection in “Communication” tab in

the “Configuration” dialog box in “Options” menu (Options Æ Configuration Æ Communication). If

“Optimize” selection is unchecked, do not select “Data Length Limit”.

B. Definition of controller Read/Write address

Registers

Read/Write Range

Register Type

Format

Word No.

Bit No.

Data length

Output Registers

Wn

n: 40001 ~ 50000

N/A

Word

Input Registers

Wn

n: 30001 ~ 40000

N/A

Word

¾

Input Registers is “read only”.

Contacts

Read/Write Range

Contact type

Format

Word No.

Bit No.

Discrete Outputs

Bn

N/A

n: 1 ~ 10000

Discrete Inputs

Bn

N/A

n: 10001 ~ 20000

¾

Discrete Inputs is “read only”.

C. Connections (Connector Pinouts)

Please refer to 1.1 Pin Definition of Serial Communication for detail.