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Modbus TCP Unable to Open Port Error

Posted: Wed Dec 03, 2014 3:30 am
by memethemyn
Hi..

I recevied this message when I want to communicate with the Modbus TCP PLC.

Where is the problem..

I tried everything but I didnt find the solution..

Re: Modbus TCP Unable to Open Port Error

Posted: Mon Dec 15, 2014 2:39 am
by JohnCZ
Hi,

It is possible that you have not opened all ports that are required to communicate through modbus.

Example when you need to communicate Beijer HMI and PLC from Mitsubishi through MODBUS TCP, then you need opened the port in PLC.
L_ModBus_TCP.JPG
L_ModBus_TCP.JPG (20.18 KiB) Viewed 8631 times
Test your HMI with PC simulator. If HMI response through PC simulator then the problem is in the other site.

JohnCZ

Re: Modbus TCP Unable to Open Port Error

Posted: Tue Dec 16, 2014 12:36 am
by memethemyn
I solve the problem by installing the newest version of ix developer and runtime..

When I run the project on the developer pc there is no error but when I tried on the runtime PC the error is given. So I update the runtime and developer..

Thanks..