Detailed description
2.6 Interface structure
Basic logic functions: PLC Basic program powerline (P3 pl)
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Function Manual, 11/2006, 6FC5397-0BP10-2BA0
2.6
Interface structure
2.6.1
General
Interface data blocks
The PLC user interfaces on the 840D and 810D are identical except for the data volume.
Mapping in interface data blocks is required on account of the large number of signals.
These are global data blocks from the viewpoint of the PLC program. During system startup,
the basic program creates these data blocks from current NC machine data (no. of channels,
axes, etc.). The advantage of this approach is that the minimum amount of PLC RAM
required for the current machine configuration is used.
2.6.2
PLC/NCK interface
General
The PLC/NCK interface comprises a data interface on one side and a function interface on
the other. The data interface contains status and control signals, auxiliary functions and G
functions, while the function interface is used to transfer jobs from the PLC to the NCK.
Data interface
The data interface is subdivided into the following groups:
•
NCKspecific signals
•
Mode groupspecific signals
•
Channelspecific signals
•
Axis/spindle/drivespecific signals
Function interface
The function interface is formed by FBs and FCs. The figure below illustrates the general
structure of the interface between the PLC and the NCK.
Summary of Contents for SINUMERIK 840D sl
Page 282: ...Index Basic logic functions Acceleration B2 64 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 388: ...Basic logic functions Travel to fixed stop F1 Function Manual 11 2006 6FC5397 0BP10 2BA0 52 ...
Page 962: ...Index Basic logic functions Emergency Stop N2 20 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1704: ...Constraints Basic logic functions Spindles S1 94 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1716: ...Index Basic logic functions Spindles S1 106 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1996: ...Index Basic logic functions Tool Offset W1 208 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 2150: ...Table of contents Basic logic functions Appendix 4 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 2184: ...Glossary Basic logic functions Appendix 38 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...