OMRON CJ2M-CPU13 - Serial port communication

[T J SHARON]

Hi to all,

I have two queries about CJ2M-CPU13.

1) Can i use the in built serial port (RS232C) to the GUI or HMI?

2) Can i use the in built serial port (RS232C) to connect two CJ2M-CPU13s?

I have only limited experience and knowledge in the PLC. I would like to see a step by step instruction video or tutorial notes. 

If any of you any information pls share and help me.

 

Appreciate all help and thanks.

 

[gtsuport]

Welcome to the forum.

Only one device can be connected to RS232.

1) Yes you can connect to a GUI or HMI.

2) Yes.  Please see information on Serial PLC Link in the W472 manual.

gtsuport

[T J SHARON]

Thanks a lot.

 

[T J SHARON]

 As i said i am using 2x CJ2M cpus.

I set 1st one as master and second as slave  connected via serial cable ( wiring as per the manual).

how can i check whether they are connected or communicating?

 

 

 

[T J SHARON]

Hi all,

My serial cable as attached pic.

I used this program  as below. 

But when i use simulator i can see hexa output in 3100 & 0000. But when i go online, i cant see the output on 3100.

My objective of this project is to give some inputs in cpu and get the output from cpu2.?

[gtsuport]

You will need to use the Data Link Area of memory for the communication to work.

Data Link Area is CIO 1000 to CIO 1999.

gtsuport

[T J SHARON]

hi 

Thanks a lot gtsupport.

Do you have any sample program. 

( sorry , i dont have that much experience in PLC linking).

[T J SHARON]

I  am using 2CPUs.  CPU1 is physically connected to ID231 , and CPU2 is connected OD232. I tried to connect them via serial comm ( CPU1 as master and CPU2 as slave) and connect laptop to CPU1 for programming. when I went online, CPU1 detects ID231 ( 0000) which is correct, but CPU2 detect also ID231 (0000) . i tried to  change manually the slot , but shown error while uploading.

I connected laptop  to CPU2 and tried to get i/o info online,  then OD232 detected.

Any idea why OD232 wasn't detected while  connecting CXONE to CPU1 and two CPUs are serially linked.

 

 

 

[gtsuport]

Please see the attached.

Serial PC Link CJ2M.pdf

[T J SHARON]

thanks a lot