The far left slot of a traditional PLC chassis is known as which slot?

In a traditional PLC chassis, the far left slot is designated as "Slot 0." This terminology is standardized across many PLC designs and indicates the first slot in the chassis where an I/O module or other components may be installed. Slot 0 typically houses the CPU module or power supply, establishing it as the starting point for addressing and configuration.

Understanding this naming convention is crucial for system setup, troubleshooting, and effective module management within the PLC chassis, ensuring that you configure the system correctly and recognize the layout for maintenance and expansion purposes. Proper identification of module slots is fundamental in programming and diagnostics, as it allows for consistent reference points when configuring the logic and addressing within the control system.