Siemens SINUMERIK 840DE sl Commissioning Manual page 92

8 Tool Management
8.4 Startup in the PLC
Description of
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
8-92
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 no. (target) for loading/relocation/positioning (Int)
Location no. (target) for loading/relocation/positioning (Int)
Initial addresses of load/unload locations:
Loading/unloading location
Example calculation of address DBW n+24 (magazine no. target)
n = (m–1) * len + 4
m =2 ; len = 30
Address for magazine no. target of 2nd load point is DBW 58.
Load point 1 is intended for loading/unloading in all spindles. This must be
observed for the loading interface assignment (applies to
ShopMill on NCU (HMI Embedded)); it is automatically considered for PCU
50.3). Load point 1 is also used to relocate/position tools in any location (e.g.
buffer location).
SINUMERIK 840D sl Commissioning Manual CNC: ShopMill – 11/2006 Edition
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]
1: n = 4
2: n = 34
3: n = 64
4: n = 94
m = location no. of load station/point
len = 30 (length of one load point)
n = (2–1) * 30 + 4 ==> n = 34
DBW (34 + 24) = DBW 58
© Siemens AG 2006 All Rights Reserved
11/2006
Bit1 Bit0
INT 2 INT 1
INT 10 INT 9
Unload Load
Load/un-
load with-
out mov-
ing maga-
zine