SBC PCD1.Room - Page 37

Hardware Manual PCD1.M2110R1 │ Document 27-619 │ Version ENG 04 │ 2018-08-20
Saia-Burgess Controls AG
Operating Statuses and their LEDs
CPU / Control Process Unit
3-14
3
ExampleFUPLAFBox:
Further details are available in the online help of the FBox “HW watchdog”.
Exampleofaninstructionlist(IL)sequence:
Label Com-
mand
Operand Comment
COB 0 ; or 1 … 15
0
STL WD_Flag ; Helpsag invers
OUT WD_Flag
OUT O 255 ; Output 255 blinking
ECOB
With this code the watchdog triggers even for (continuous) loops that are due to
programming. Regarding user program cycle time, please note the following:
With cycle times longer than 200 ms, the code sequence must be repeated
multiple times in the user program in order to prevent the watchdog triggering
during RUN.
Since address 255 falls it outside the normal I/O range of a PCD1.M2_, there are
no limitations on permissible I/O modules.