Skip to main content
Danyal6-Contributor
6-Contributor
Dec 23, 2025 2:28 PM UTC
Solved

Unable to read data from Control Logix

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

 

MRohillaAnswer
Support
Jan 19, 2026 12:37 PM UTC

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 

View in thread

2 replies

rajskumar16-Pearl
16-Pearl
Jan 13, 2026 6:49 PM UTC

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 

Translate
MRohillaCommunity ManagerAnswer
Support
Jan 19, 2026 12:37 PM UTC

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 

Translate
Terms & ConditionsAccessibility statement