Signal Description - Siemens SINUMERIK 840D sl Commissioning Manual

11/2006
8.4.2

Signal description

Overview of
data blocks
Overview DB71
DB71
Data Block
Byte Bit7
DBB 0 INT 8
DBB 1
INT 16
DBB 2, 3
DBB n + 0
DBB n + 1
DBB n + 2
DBB n + 3
DBD n + 4
DBD n + 8
DBD n + 12
DBW n + 16
DBW n + 18
DBW n + 20
DBW n + 22
DBW n + 24
DBW n + 26
DBW n + 28
HMI to PLC
© Siemens AG 2006 All Rights Reserved
SINUMERIK 840D sl Commissioning Manual CNC: ShopTurn – 11/2006 Edition
The following data blocks are used by tool management; i.e. they must not be
assigned by the PLC user program:
DB 71 for loading/unloading points
DB 72 for tool holder
DB 73 for turret
DB 74 internal data block for tool management
If you need to change the data for magazines, buffers, or loading positions,
delete data blocks DB 71 to DB 74 and restart the PLC.
Signals of load/unload points
Bit6 Bit5 Bit4
INT 7 INT 6 INT 5
INT 15 INT 14 INT 13
NC program
positions
magazine
Assigned channel (8bit–Int)
Tool management number (8bit–Int)
User parameter 0 (DWord)
User parameter 1 (DWord)
User parameter 2 (DWord)
Identifier for load/unload point (Int), (fixed value 9999)
Location no. of load/unload point (Int)
Magazine no. (source) for loading/relocation/positioning (Int)
Location no. (source) for loading/relocation/positioning (Int)
Magazine number (target) for loading/relocating (Int)
Location number (target) for loading/relocating (Int)
8.4
NCK –>PLC interface
Bit3 Bit2
Interfaces
INT 4 INT 3
INT 12 INT 11
Position at Relocate
loading point
Unassigned
$P_VDITCP[0]
$P_VDITCP[1]
$P_VDITCP[2]
8 Tool Management
Start–up in the PLC
Bit1 Bit0
INT 2 INT 1
INT 10 INT 9
Unload Load
Load/un-
load with-
out mo-
ving ma-
gazine
8-97