Unable to read AB ControlLogix program tag in 397e (working in 397d)

[jsorah]

The tag I am trying to read is as follows (using the Read function on the ControlLogix driver class):

Program:MainProgram.AnalogInSlot3.Ch0InputError

Exception received in 397e


MfgControl.AdvancedHMI.Drivers.Common.PLCDriverException: Read Failed. Invalid Tag Address.,  Status Code=4
   at AdvancedHMIDrivers.EthernetIPforCLXCom.Read(String startAddress, Int32 numberOfElements) in \AdvancedHMIDrivers\AllenBradley\EthernetIPforCLXCom.vb:line 388


I did a wireshark trace and notice that the CIP packets sent with this tag show malformed in the Info column and the tag sent to the PLC itself is different from 397d.

Reading this tag works with the 397d code and the CIP packets do not show up as malformed.

[Archie]

See this thread:

http://advancedhmi.com/forum/index.php?topic=628.0

[jsorah]

Thanks for the quick response.  I'll continue to follow up with the issue in that thread.