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Help with RS-232 ASCII Communication - SoMachine

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Crewman

Help with RS-232 ASCII Communication - SoMachine

Hi, 

 

I'm currently trying to set-up a M241 PLC to communicate with a Rigol Multimeter via RS-232 using the ASCII manager. 

 

I have had success sending commands to the multimeter (and hyperterminal on a PC) from the PLC using the example below from the 

SoMachine Modbus and ASCII Read/Write Functions PLCCommunication Library Guide 

 

I have taken this example and modified it in order to try and receive a basic message, initially from hyperterminal, See 'Current receive example' below, however I am yet to get this working. 

 

Can anyone share an example of code used to receive a message using this SEND_RECV_MSG function block? Or provide a hint as to where I am going wrong? 

 

Send Example:

Untitled.png 

Current Receive Example:

2.png 

The PLC is connected to my computer using a RJ45 to serial cable and a serial to usb converter.

I believe I have the ascii manager and cable set-up correctly as I am able to send messages from the PLC to hyperterminal.

 

Thanks in advance, 

Kiwi_Karl

2 REPLIES 2
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Re: Help with RS-232 ASCII Communication - SoMachine

Hello,

 

You can use programme that at linked.And also You can find video at attached for explaining programme.But video is turkish language.

Best Regards,

 

Link:  RS232 ascii communication with TM241 

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Crewman

Re: Help with RS-232 ASCII Communication - SoMachine

Hi ismailozinan, 

 

Thank you for the program. It was very helpful, I've got it working now!

 

Regards

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