Omron PLC nx1p2-9024dt PC Communication

[CHOO 0]

Hi Everyone,

I am new to PLC , hope can get help from the below requirement.

I have project need to send message from pc to PLC via TCP IP and i am using VB.net programming.

1. I have write program to receive data from PLC is working. PC will send back the message when receive the data from PLC and PLC able to received too.

2. I have another program need to send the message from PC to PLC by IP Address and port but every time i connect will get the error message not reachable for destination port. I check with the PLC supplier they say the Port no already open for listening the incoming data.

My objective is to send a message to PLC to do some action after complete PLC will send back the complete status. If able to provide coding example is much appreciated.

Regards

Choo 

[photovoltaic 121]

Just to clarify: you have just one PC or multiple PCs?

Have you tested with putty or something similar to eliminate the possibility of a program error on the PC?

Can you share your program?

Socket communication is pretty straight forward in Sysmac:

1. Enable the SktTCPAccept function block with the port specified
2. The Done output will become true when the PC connects to the PLC
3. Execute the SktGetTCPStatus block at a regular interval to check if any data has been received
4. Use SktTCPSend and SktTCPRcv to retrieve data from the buffer or send data to the PC

I attached a rather unpolished test program I have used in the past

TCP Socket .smc2