Hardware manual PCD1.M2220-C15 │ Document 27-640 – Version ENG03 │ 2020-03-25
Saia-Burgess Controls AG
System resources
CPU/processor unit
3-8
3
3.6
System resources
3.6.1
User program in block structure
The user program parts are saved by the programmer in blocks assigned
according to their function.
Type
Number
Addresses Comments
Cyclical organisation blocks (COB)
32
0… 31
Main program elements
Exception/system-dependent
organisation blocks (XOB)
64
0… 63
accessed by the system
Program blocks (PB)
1000
0… 999
Subprograms
Function blocks (FB)
2000
0… 1999
Subprograms with parameters
Sequential blocks (SB) with total of
6,000 steps and transitions
96
0… 95
for Graftec programming of
sequential processes
Block structure
FB 999
(.. 1999)
PB 299
(.. 999)
COB 15
(.. 31)
COB ...
COB 0
XOB 31
(.. 31)
XOB ...
XOB 0
PB ...
PB 0
FB ...
FB 0
SB 31
(95)
SB ...
SB 0
Step
0..2000
(..6000)
Transition
0 ..2000
(..6000)
ST
TR
IST
Main and system program blocks
Subprogram and functional program blocks
Sequential program blocks