Skip to main content
D
Danyal6-Contributor
6-Contributor
December 23, 2025
Solved

Unable to read data from Control Logix

  • December 23, 2025
  • 2 replies
  • 190 views

Hello everyone,

 

I am trying to read data from Allen Bradley PLC. However, Kepserver is unable to read all the data. Below are few errors that are occurring:

 

Date Time Level Source Event
12/23/2025 6:20:52 PM Warning Allen-Bradley ControlLogix Ethernet  | Unable to read tag. Controller tag data type unknown. Tag deactivated. | Tag address = 'PROGRAM:P09_INFEED.STCAMSBM1', Data type = 0XD37F.

 

Date Time Level Source Event
12/23/2025 6:20:52 PM Warning Allen-Bradley ControlLogix Ethernet | Unable to read tag. | Tag address = 'PROGRAM:P09_INFEED.FBSTARAXIS3', CIP error = 0XF, Extended error = 0X2100.

 

Date Time Level Source Event
12/23/2025 6:36:03 PM Error Allen-Bradley ControlLogix Ethernet  | Database error. Unable to resolve CIP data type for tag. Setting to default type. | CIP data type = 0X8871, Tag name = 'OPT_PrintCheck', Default data type = 'DEFAULT'.

 

Can anyone help me above issues please ?

 

Regards,

Danyal Shahzad

 

Best answer by MRohilla

Hello,

 

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

CS419100 - Error "Database error. Unable to resolve CIP data type for tag. Setting to default type. | CIP data type = <type>, Tag name = '<tag>', Default data type = '<type>'" in Allen-Bradley ControlLogix Ethernet of PTC Kepware Products

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

Thanks 

2 replies

R
rajskumar16-Pearl
16-Pearl
January 13, 2026

Hello,

 

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

CS419100 - Error "Database error. Unable to resolve CIP data type for tag. Setting to default type. | CIP data type = <type>, Tag name = '<tag>', Default data type = '<type>'" in Allen-Bradley ControlLogix Ethernet of PTC Kepware Products

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

Thanks 

M
MRohillaCommunity ManagerAnswer
Support
January 19, 2026

Hello,

 

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

CS419100 - Error "Database error. Unable to resolve CIP data type for tag. Setting to default type. | CIP data type = <type>, Tag name = '<tag>', Default data type = '<type>'" in Allen-Bradley ControlLogix Ethernet of PTC Kepware Products

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

Thanks 

Terms & ConditionsAccessibility statement