Introduction.

Workshop PG5
Program structures
Example COB:
Here you have an example program ( once in IL and once in FUPLA) which makes
the output 64 blink at a rate of 1,5 seconds. The program is written in the COB 0.
The COB 0 is followed by the COB 15.
Instruction list program:
LADDER or FUNCTION BLOCK program:
COB 0 ;COB 0 starts here
0
STL T 1 ;If timer 1 equals 0
LD T 1 ;then load it with 1.5 s.
15
COM O 64 ;and toggle the output 64
ECOB ;COB 0 ends here
START UP
COB 15 ;Next block
0
NOP
ECOB
(FBox: Blinker, Blink delay T)
COB’s have
different qualities:
1: COB’s have a number. You can choose between 0 and 15.
2: They can have a name.
3: They have a SUPERVISION TIME. This time (in 10th’s of a ms), says
how long the execution of the COB is allowed to take. If the supervision
time elapses before the COB has finished execution (ECOB reached), the
Exception bloc XOB 11 (will be explained right away) is executed. If there
is no XOB11 programmed, the next COB is started. A supervision time of
0 means that the supervision time is not activated.
4: A comment can also be added.
Example: FBD editor
Example: IL-editor (Instruction list)
2.
1.
3.
4.
3.
2.
1.
4.
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