sacsac
Member
Apparently, the Automation Direct C-More HMIs do not support AB UDT type tags. I couldn't read or write with the UDT tags, while all other tag types worked. I kept getting a PLC-498 error on the HMI. I went into the system screen and viewed the error events. All of the errors were caused by UDT tags. I called Automation Direct tech support and the guy I spoke to didn't know what a User Defined was. That was not a good sign. I wound up mapping my UDT tags into internal tags just for the HMI to use. I guess you get what you pay for.