BECKHOFF CX9000 - Manual (Page 7)

Foreword
Embedded PC 5
other things, the intervals between inspections of the controller. The operator must initiate such inspections in good
time.
Operator requirements
Read the operating instructions
All users of the product must have read the operating instructions for the system they work with.
System know-how
All users must be familiar with all accessible functions of the product.