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4-Participant
September 1, 2025
Solved

Kepware compatibility with ControlLogix firmware version

We are using KepServerEX6 (6.6.350.0) communicating to Control Logix PLCs.

We want to upgrade the PLCs to Control Logix Firmware 20.58.

How can I determine if they are compatible?

ntripathiAnswer
16-Pearl
September 1, 2025

Greetings @SL_SCADA, 

 

Please take a look at the following article as it may help resolve your issue:

 

https://www.ptc.com/en/support/article/CS298912

 

If you are prompted to log in to view the complete article, you can use your MyKepware login credentials.

 

I would like to inform you that the Allen-Bradley ControlLogix Ethernet driver cannot communicate with PLC controllers running firmware 20.58 when Protocol Mode in Device Properties | Logix Options is configured as Logical Blocking or Logical Non-Blocking.

I recommend configuring the Protocol Mode to Symbolic under Device Properties | Logix Options, especially after upgrading to firmware version 20.58.
If you have any questions or need further assistance, please feel free to contact us.



 

 

1 reply

ntripathi16-PearlAnswer
16-Pearl
September 1, 2025

Greetings @SL_SCADA, 

 

Please take a look at the following article as it may help resolve your issue:

 

https://www.ptc.com/en/support/article/CS298912

 

If you are prompted to log in to view the complete article, you can use your MyKepware login credentials.

 

I would like to inform you that the Allen-Bradley ControlLogix Ethernet driver cannot communicate with PLC controllers running firmware 20.58 when Protocol Mode in Device Properties | Logix Options is configured as Logical Blocking or Logical Non-Blocking.

I recommend configuring the Protocol Mode to Symbolic under Device Properties | Logix Options, especially after upgrading to firmware version 20.58.
If you have any questions or need further assistance, please feel free to contact us.



 

 

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