User Manual

289
08/04 AWB2528-1423GB
7 Inside easy
easy Program cycle In conventional control systems, a relay or contactor control
processes all the circuit connections 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 easy 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
easycircuit diagram is processed cyclically every 0.1 to
40 ms.
During this time, easy passes through six segments in
succession.
How easy evaluates the circuit diagram:
In the first four segments easy evaluates the contact fields in
succession. easy checks whether contacts are switched in
parallel or in series and saves the switching states of all
contact fields.
In the fifth segment, easy assigns the new switching states
to all the coils in one pass.
Circuit
connec
tions
Segment
12 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