Hardware manual PCD7.LRxx-PG5 room controller │ Document 27-653; version ENG07 │ 2019-03-21
Saia-Burgess Controls AG
System resources
Room controller/CPU
3-16
3
3.8
System resources
3.8.1
User program in block structure
The user program parts are stored by the programmer in blocks assigned accord-
ing to their function.
Type
Number Addresses Remarks
Cyclical organisation blocks (COB)
2*
0...1
Main program elements
Exception/system-dependent
organisation blocks (XOB)
4
10, 12, 13, 16 Accessed by system
Program blocks (PB)
100
0...99
Subprograms
Function blocks (FB)
100
0…99
Subprograms with parameters
* When the device is programmed with Fupla, it automatically creates a COB in the
background. Thus, only 1 COB is available to the programmer. If programmed
exclusively with IL, both COB are available.
Program block structure
XOB 16
COB 1
COB 0
XOB 13
XOB 12
XOB 10
PB 99
PB ..
PB 0
FB 99
FB ..
FB 0
Main and
system program blocks
Subprogram and
function program blocks