Modbus Communication Between Profinet and a Modbus device!!!!!!

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After selecting and configuring the CPU, create Data Blocks as:

Here’s the Data Types for the parameters needed.

DATA: (TCON_IP_v4)

This data type structure includes:

RemoteAddress: (IP_V4)

This data type structure includes:

ADDR: (Array[1..4] of Byte NOTE: we are reading 4 Byte
- ADDR[1]:
- ADDR[2]:
- ADDR[3]:
- ADDR[4]:

Remote Port: (UInt)

LocalPort: (UInt)

Create a network for Client DB to read the data:

Search for MB_CLIENT, or

This is in:

Communication Tab, Others, MODBUS TCP, MB_CLIENT

Set the parameters:

REQ: Desired clock frequency

Disconnect: A Tag to disconnect the client

MB MODE: (0 for Reading)

MB_DATA_ADDR: (Register address to read, 40001)

MB_DATA_LEN: (10 words) NOTE: Specify as much as you need

MB_DATA_PTR: (P#M200.0 BYTE 20) NOTE: Pointer for M address of 200.0 for 20 byes

CONNECT: (“MB_DATA_READ”.DATA) NOTE: Select the Read DB from dropdown