If you manage to acquire a physical or digital copy of the manual, these are the sections you should study immediately.
Before diving into the manual itself, it is essential to understand what the YSEM 520 EG1 is. While YSEM is not as globally ubiquitous as Siemens or Allen-Bradley, it is a respected brand in specific industrial niches, particularly in Asia and Europe, for manufacturing: ysem 520 eg1 manual