PC Communicate with NT21

Hi everyone,

Im now working on a project using Omron PLC CJ1M CPU21 and Touch Panel NT21.

I manage to work out the communication of PLC and Touch Panel, and the communication of PC and PLC. However I failed to set up the communication of PC to NT21 Touch Panel. Im using a RS232 cabel. I follow the instruction manual, and set up the PC comm port and baud rate accordingly.
In the Touch Panel NT21 itself, i set the memory switch Comm.B to NT link(1:1). Then i switch to Transmission mode. However the commmuncation didnt work when i try to download a screen to NT21.

Can anyone who used NT21 before tell me what step did i miss out?
Thank you.
Cheers,

sutton

Check the pinouts on your cable... the PLC to NT is different than the PC to NT.

You can download the cable pinout at this link:

http://forum.mrplc.com/index.php?act=Downloads&CODE=02&id=349

If the NT is set for NT Link on Port B, you will need to set the PLC port to NT Link also. You can do this in the Setting/Host Link tab of CX Programmer.

Hope this helps

Are both ports (PLC & screen) set to NTLink 1:1? I am more inclined to use 1:N.

Another thing I thought about, did you set the PT Control and PT Notify areas in the NT21. Also, the first word in the PT Control area needs to be set for a valid screen number. Screen 0 (zero) is NOT a valid screen number.