Organisation of the HLI
As opposed to the usual simple structure of the data to be exchanged in input/output data with PLC applications, the HLI contains complex structures. They reflect the logical structuring of the CNC into channels, axes and platform data.
The logical structure of the HLI is shown in the diagram below:
The structuring into channel-specific and axis-specific data areas is clearly shown. The channel-specific and axis-specific memory areas on the HLI feature the same logical structure.
The relevant memory areas are subdivided into
- a header area with management data
- and a user data area with status information, control commands and technology data.
The channel/axis-specific memory areas are shown magnified in the diagram below:
