1162 HEIDENHAIN Technical Manual MANUALplus 620
6.22 Diagnosis with the Online Monitor (OLM)
6.22.1 Introduction
The Online Monitor (OLM) assists you in commissioning and provides 
diagnostic functions to check control components:
 Display of IPO internal variables for axes and channels
 Display of CC internal variables (if a CC is present)
 Display of hardware signal states
 Various trace functions
 Activation of spindle commands
 Enabling IPO internal debug outputs
The OLM is included in the control software.
Software structure