ABB CL Series, Руководство по применению

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1SVC 440 795 M1100
8 Inside the display system
Display system program
cycle In conventional control systems, a relay or contactor control
processes all the rungs in parallel. The speed with which a
contactor switches is thus dependent on the components
used, and ranges from 15 to 40 ms for relay pick-up and
drop-out.
With the display system the circuit diagram is processed with
a microprocessor that simulates the contacts and relays of
the circuit concerned and thus processes all switching
operations considerably faster. Depending on its size, the
display system circuit diagram is processed cyclically every
0.1 to 40 ms.
During this time, the display system passes through six
segments in succession.
How the display system evaluates the circuit diagram:
In the first four segments the display system evaluates the
contact fields in succession. The display system checks
whether contacts are switched in parallel or in series and
saves the switching states of all contact fields.
In the fifth segment, the display system assigns the new
switching states to all the coils in one pass.
Rung Segment
1 2 3 4 5 6
1
2
3
4
..
I 12---j------------------------Ä Q 08
I 01----I 04----HW01Q1--T 06Q1-Ä T 01EN
I 02----I 03-------------------R Q 02
T 01---u-----------------------Ä Q 01
P 01---k