This course reviews the CNC controller hardware and examines the technologies connecting the various components. This provides a good foundation for the 840D sl CNC and its components and purpose relating to the systems in your plant. In this class, we cover all CNC components, describe their purpose and relationship with each other, in an effort to provide you with a basic understanding and help you become more effective troubleshooter.

Learning Outcomes
At the conclusion of this class, you will:

  • Understand the Siemens SINUMERIK 840D CNC system
  • Understand basic applications
  • Understand how the 840D integrates with the S7 PLC
  • Be able to create a simple NC program
  • Be able to make simple program changes
  • Be able to Edit, Backup Restore a running system


  • Introduction
  • 840D CNC overview
  • Responsibility of 840D CNC
  • Hardware, connectivity
  • Software, memory organization
  • Parameters
  • Screen navigation, operating areas
  • System functions, machine areas
  • Modes of operation
  • Software programming/navigation
  • Parameter areas
  • Programming areas
  • Service areas
  • Fault diagnostics
  • Diagnostic areas
  • Step 7 software
  • Servo drives
  • Motors/Feedback, Linear scale feedback
  • Reference material


40 hours

Maintenance electricians, Controls/Application engineers

Software Platform
Course utilizes STEP7 V5.5 and STARTER

Course Material
Each participant will receive their own class binder with all reference material and exercises, so that these can be repeated later.

Hands-On Exercises
Customer specific