Defined Logical Functions/Defines; Graphical Representation Of Function Sequences - Siemens SINUMERIK 840D sl Function Manual

B3: Several operator panels connected to several NCUs, distributed systems - only 840D sl
2.15.2.3

Defined logical functions/defines

Note
Please refer to Section "Defined logical functions/defines" for the legal values for bus type,
functions/status and additional information, plus permissible combinations of status and
additional information. The logical identifiers of functions are used in the following diagrams.
2.15.2.4

Graphical representation of function sequences

Overview
The diagrams below describe how an operator station is switched over (switchover from
NCU_1 to NCU_2).
The first five diagrams describe the switchover operation for an operator station and the next
three the switchover operation for a server.
If an operator panel (MMC) in the offline state wants to go online on an NCU (e.g. on power
up), the sequence OFFL_REQ_OP (...), or OFFL_CONF_OP(...) is not necessary.
Figure 2-36
Extended Functions
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
MMC_1 is linked online to NCU_1 and wants to switch over to NCU_2, switchover
disable is set in PLC_1
2.15 Examples
213