Moeller PS 416-BGT-4 Series, Hardware And Engineering, Page: 102 / 150

Function
99
02/98 AWB 27-1208-GB
PS 416-CPU-200/-300/-400
Function The user program is started once all required
activities are processed in the system section. Fixed
and event-driven system activities which are taken
from the system pulse interrupt program processing.
A consistent process image is maintained between
the creation of the input and output image in the user
program cycle. This gives the impression that inputs/
outputs are operated in parallel. The following
system activities define the process:
System pulse (TS)
The system pulse is 1 ms and forms the basis for all
system activities.
General system activities (TA)
General system activities occur each 19 ms for
monitoring the following system components:
Operating elements of the CPU
Memory card
Watchdog for Suconet K, S, operating system
Watchdog for power supply unit (ENA signal)
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