Modbus Tcp Master Function Procedure - Omron sysmac NX102-9 Series Owner's Manual

Machine automation controller, cpu unit built-in ethernet/iptm port

Table of Contents

10 Modbus TCP Master Function

10-3 Modbus TCP Master Function

When you use the Modbus TCP Master Function, you need to also use the following instructions other

than the Modbus TCP instruction.

SktTCPConnect

SktSetOption

Establishes the TCP/IP connection with the Modbus TCP slave before the exe-

cution of the Modbus TCP instruction. The default connection port is 502.

Disconnects the TCP/IP connection with the Modbus TCP slave after the execu-

tion of the Modbus TCP instruction.

The application of the TCP-NODELAY option in the TCP/IP settings with the

Modbus standard is recommended. Set it before the execution of the Modbus

TCP instruction after the TCP/IP connection is established with the Modbus TCP

The receive buffer is not cleared during the execution of the Modbus TCP

instruction. This instruction is executed if the receive buffer needs to be cleared

during use of the Modbus TCP instruction. For example, execute this instruction

when the previous Modbus TCP command response may be stored in the

receive buffer.

NJ/NX-series CPU Unit Built-in EtherNet/IP Port User's Manual (W506)

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