Article - CS277918
Allen-Bradley ControlLogix Logical Protocol Modes Not Compatible with Firmware 20.19 or 20.57 or 20.58 in PTC Kepware Products
Modified: 12-Jun-2025
Applies To
- Kepware Server (formerly KEPServerEX) 5.20.396.0 to 6.18
- ThingWorx Kepware Server (legacy) 8.0 to 6.18
- Rockwell Automation Allen-Bradley:
- ControlLogix
- CompactLogix
Description
- The Allen Bradley ControlLogix Ethernet driver cannot communicate with PLC controllers running firmware 20.19 or 20.57 or 20.58 when Protocol Mode in Device Properties | Logix Options is configured as Logical Blocking or Logical Non-Blocking
- When Kepware server attempts to update tags, the PLC controller responds with below error in Kepware event Log
-
CIP 0x0F Permission Denied
-
- The Allen Bradley ControlLogix Ethernet driver can Auto Tag Generate (ATG) from the Device but then cannot communicate
- Is there any known communication issues with a controller having Rockwell firmware version 20.19 when using KEPServerEX?
- Support connecting to AB CompactLogix 1769-L33ER Version 20.19 using KepServerEX 6.14.263.0
This is a printer-friendly version of Article 277918 and may be out of date. For the latest version click CS277918