Siemens SINUMERIK Commissioning Manual page 496

Configure hotkeys and PLC keys
4.3 PLC interface
Structure of the interface
The interface between HMI Embedded sl and the PLC uses the following data:
HMI 1:
HMI 2:
PLC-Byte
HMI byte
Two bytes are used for the display number to be transferred by the PLC; these are one PLC
byte and one HMI byte for coordinating the display selection.
Operating the interface
The interface is operated by the PLC program supplied by the manufacturer, using the
following functions (DB 19 extract, first HMI interface):
PLC → HMI
DBW 28 Screen number
Bit DBB 30
0 Display selection
1 Display deselection
2
3
4
4-14
DB19.DBW28: Screen number
DB19.DBB30: Control bits PLC → HMI, PLC byte
DB19.DBB31: Control bits HMI → PLC, HMI byte
DB19.DBW28: Screen number
DB19.DBB80: Control bits PLC → HMI, PLC byte
DB19.DBB81: Control bits HMI → PLC, HMI byte
Bit0 Display selection
Bit1 Display selection
Bit0 Display selection or display deselection accepted
Bit1 Display is being selected or deselected
Bit2 Display is selected
Bit3 Display is deselected
Bit4 Error, display selection not possible
Bit7 Inactive bit
Selection Deselection
(1)
1 (2)
0 (4)
1 (1)
0 (4)
HMI → PLC Selection
DBB 31
Select/deselect 1 (3)
accepted
0 (6)
Display is being 0 (3)
selected
Display is being
1 (5)
deselected
Display is selected 0 (3)
1 (7)
Display is deselected 0 (3)
Error, display 0
selection not possible
Commissioning Manual, 11/2006, 6FC5397-0DP10-0BA0
Deselection
1 (2)
0 (3)
0 (3)
0 (3)
0 (2)
1 (3)
0 (2)
Expanding the user interface