User manual

EZ circuit diagram cycle
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Example: switching in the next cycle
Start condition:
• I1, I2 switched on
• Q1 switched off.
This is the circuit diagram of a self-latching circuit. If I1 and I2
are closed, the switching state of relay coil
ÄQ1 is latched via
contact Q1.
• 1st cycle: Inputs I1 and I2 are switched on. Coil
ÄQ1 picks
up.
• Contact Q1 remains switched off since EZ evaluates from
left to right.
• 2nd cycle: The self-latching function now becomes active.
EZ has transferred the coil states to contact Q1 at the end
of the first cycle.
Example: Do not wire backwards
This example is shown in section “Creating and modifying
connections”. It was used there to illustrate how NOT to do it.
In the third rung, EZ finds a connection to the second rung in
which the first contact field is empty. The output relay is not
switched.
When wiring more than three contacts in series, use one of the
marker relays.
I1uI2----ÄQ1
Q1k
I1-Q4-i3o
z-----k
hI2-I4-ÄQ2
I1-Q4-i3-ÄM1
I2-I4-M1-ÄQ2
EZ500_700.book Page 233 Tuesday, May 3, 2005 5:15 PM