Assignment: Fb/Fc; Assignment: Db - Siemens SINUMERIK 840D sl Function Manual

13.12.2

Assignment: FB/FC

Number
FB15
FB1, FC2, FC3, FC5
FC0 ... 29
FB0 ... 29
FC30 ... 999
FB30 ... 999
FC1000 ... 1023
FB1000 ... 1023
FC1024 ... upper limit
FB1024 ... upper limit
The actual upper limit of the block number (FB/FC) depends on the PLC CPU on which the selected
1)
NCU is located.
Note
Values of FC, FB see " Memory requirements of the basic PLC program (Page 897)".
13.12.3

Assignment: DB

Note
Only as many data blocks as are required according to the NC machine data configuration are
set up.
Overview of data blocks
DB no.
1
2 ... 5
6 ... 8
9
10
11
12
13 ... 14
15
16
17
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Meaning
Basic program
Basic program
Reserved for Siemens
Reserved for Siemens
Free for user assignment
1)
Free for user assignment
1)
Reserved for Siemens
Reserved for Siemens
Free for user assignment
Free for user assignment
Name
PLC-MELD
NC-COMPILE
NC INTERFACE
Mode group 1
P3: Basic PLC program for SINUMERIK 840D sl
Name
Reserved for Siemens
PLC messages
Basic program
Interface for NC compile cycles
Central NCK interface
Interface mode group
Computer link and transport system interface
Reserved for basic program
Basic program
PI Service definition
Version identifier
13.12 Assignment overview
Pack‐
age
BP
BP
BP
BP
BP
879