Frequently asked questions
Modicon TM173 PLC showing CFG_AI1 _> Object not found error message
FAQ000280246
06 March 2026
Issue:
The Modicon TM173 PLC is failing to recognize the CFG_AI1 input configuration parameter, resulting in the error message: CFG_AI1 _> Object not found. Please refer to the error message below.
Product Line:
TM173O Product Range.
Resolution:
Cfg_AI1 is not present on TM173; instead, the target variable is sysParameter, which is a structure that enables access to all BIOS settings. In this instance, you should utilize:
sysParameter.Cfg_AI[]