Siemens SINUMERIK 840D sl Function Manual page 210

B3: Several operator panels connected to several NCUs, distributed systems - only 840D sl
2.15 Examples
Note for the reader
The arrangement of the signals of a block in box PLC_x (marked as B) corresponds to the
arrangement of signal names in the header section (marked as A). Blocks B repeat in box
PLC_x from top to bottom as a function of time.
Figure 2-34
210
MMC_1 requests active mode, MMC_2 is in active mode, can change to passive mode
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Extended Functions