Assignment Overview - Siemens SINUMERIK 840D sl Configuration Manual

Programming the PLC
3.1 General information about the PLC program
3.1.6

Assignment overview

From the following block number assignment overview, you can find out whether a specific
block number (or block address) can be used for the PLC user program, or whether it is
assigned or reserved by Siemens or the PLC basic program.
Table 3- 7
FB number
0
1
2...14
15
16...29
30...999
1000...1009
1010...1019
1020...1023
1024...7999
Table 3- 8
FC number
0...1
2...3
4
5
6...29
30...999
1000...1023
1024...7999
Table 3- 9
DB number
1
2...11
12
13...14
56
Assignment of FB numbers
Availability
Reserved
Occupied
Reserved
Occupied
Reserved
Freely available (user
program)
Reserved
Reserved or available
Reserved
Freely available (user
program)
Assignment of FC numbers
Availability
Reserved
Occupied
Reserved
Occupied
Reserved
Freely available (user
program)
Reserved
Freely available (user
program)
Assignment of DB numbers
Availability
Reserved
Occupied
Occupied
Reserved
Occupied by
Siemens
Siemens (PLC basic program)
Siemens
Siemens (PLC basic program)
Siemens
-
Siemens
Exclusively available for F blocks of Safety Inte-
grated plus (F-PLC)
Siemens
-
Occupied by
Siemens
Siemens (PLC basic program)
Siemens
Siemens (PLC basic program)
Siemens
-
Siemens
-
Occupied by
Siemens
Siemens (PLC basic program)
Siemens (computer link and
transport system interface)
Siemens (PLC basic program)
SINUMERIK STEP 7 Toolbox V14 SP1
Configuration Manual, 05/2017