I am using Ignition V7.8.0 to connect to a GE 90-30 model IC693CPU374 PLC with the Modbus TCP Driver.
I am simply trying to duplicate an existing GE Quick Panel HMI application using Ignition.
I can successfully create tags to address and connect to the following PLC addresses of my device PLC.
Discrete Inputs like %I00420 using OPC Item Path [PLC]DI420
Discrete Outputs like %Q00429 using OPC Item Path [PLC]C429
Real holding registers like %R00082 using OPC Item Path [PLC]HRF82
Integer holding registers like %R00288 using OPC Item Path [PLC]HR288
I can not, however, successfully address and connect to any internal bits like %M00001.
Looking over the documentation, it is not clear if the %M internal bits are even available over the Modbus TCP driver.
Has anyone had success connecting to internal bit (%M) registers of a GE 90-30 PLC with Ignition?
Is there a different driver specifically for the GE 90-30 that I’m missing?
Any suggestions are always appreciated.
Thank you for your help,