Saia-Burgess Controls AG
Manual Manual PCD 1 / PCD 2 Series │ Document 26 / 737 EN22 │ 2013-11-26
CPUs and expansion housings
3-4
System resources
3
3.3 System resources
3.3.1 Program blocks
Type Number Addresses Remarks
Cyclic organization blocks
(COB)
16 0…15 Main program elements
Exception/system-dependent
organization blocks (XOB)
32 0…31 called from the system
Program blocks (PB) 300 0…299 Sub-programs
Function blocks (FB) 1000 0…999 Sub-programs with parameters
Sequential blocks (SB)
PCD1, PCD2.M110/M120/M150:
total 2000 steps and transitions
each
PCD2.M170, PCD2.M480:
total 6000 steps and transitions
each(withPG5≥1.2and
rmwareversion≥010)
32
96
0…31
0…95
forGraftecprogrammingof
sequential processes
3.3.2 Computation ranges for count types
Type Remarks
Integers – 2,147,483,648 to
+ 2,147,483,647
Format: decimal, binary, BCD or
hexadecimal
Floating point numbers –9.22337x10
18
to
– 5.42101 x 10
-20
+9.22337x10
18
to
+ 5.42101 x 10
-20
Instructionsareprovidedto
convert values held in SBC
format (Motorola Fast Floating
Point,FFP)toIEEE754format
and vice versa.