Interface Plc/Hmi - Siemens SINUMERIK 828D Function Manual

P3: Basic PLC Program for SINUMERIK 840D sl
13.7 Interface structure
Figure 13-8 Interface between PLC and axes/spindles/drives
13.7.2

Interface PLC/HMI

General
The following groups of functions are required for the PLC/HMI interface:
• Control signals
• Machine operation
• PLC messages
• PLC status display
Control signals
Some control signals are signal inputs, for example, via the machine control panel, which have to be taken into
account by the HMI. This group of signals includes, for example, display actual values in MCS or WCS, key
disable, etc. These are exchanged with the HMI via a separate interface data block (DB19).
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Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Basic Functions