This document provides safety and operating instructions for a programming manual. It contains two main dangers:
1) When performing online operations from a PC to a running PLC, an interlock circuit must be configured to ensure safety of the overall system. Corrective actions must also be predetermined in case of communication errors.
2) Read the manual carefully before performing online operations like forced outputs from a PC connected to a running CPU, as it could damage equipment or cause accidents if not done properly.
It also provides instructions on used operating systems, installation and uninstallation, communications modules, programming, and use of Microsoft software. Precautions are outlined to avoid errors and ensure safe use of the system.