User manual

For more information visit: www.EatonElectrical.com

Inside EZ

MN05013003E232

The fifth segment is outside the circuit diagram and EZ uses it

to establish contact to the “outside world”: The output relays

Q1 to Q... are switched and inputs I1 to I.. are read again. EZ

also copies all the new switching states to the status image

EZ only uses this status image for one cycle. This ensures that

each rung is evaluated with the same switching states for one

cycle, even if the input signals at I1 to I12, for example,

change their status several times within a cycle.

Evaluation in the circuit diagram and high-speed counter

functions

When using high-speed counter functions, the signal state is

continuously counted or measured irrespective of the

processing of the circuit diagram. (C13, C14 high-speed up/

down counters, C15, C16 frequency counters)

EZ operation and effects on circuit diagram creation

EZ evaluates the circuit diagram in these five segments in

succession. You should therefore remember two points when

you create your circuit diagrams:

• The changeover of a relay coil does not change the

switching state of an associated contact until the next cycle

starts.

• Always wire forwards, upwards or downwards. Never wire

backwards.

EZ500_700.book Page 232 Tuesday, May 3, 2005 5:15 PM