Saia-Burgess Controls AG
Manual
Manual PCD 1 / PCD 2 Series
│ Document 26
/
737 E
N22 │ 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 (with PG5 ≥ 1.2 and
firmware version ≥ 010)
32
96
0…31
0…95
for Graftec programming of
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
– 9.22337 x 10
18
to
– 5.42101 x 10
-20
+ 9.22337 x 10
18
to
+ 5.42101 x 10
-20
Instructions are provided to
convert values held in SBC
format (Motorola Fast Floating
Point, FFP) to IEEE 754 format
and vice versa.
