Circuit Diagram Elements; Function Blocks; Relays - Eaton easyE4 Manual

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5.3 Circuit diagram elements

A circuit diagram is a series of commands that the easyE4 device processes cyc-

lically in RUN operating mode.

Coils and contacts are interconnected in the circuit diagram. In RUN mode, a coil is

switched on or off depending on the power flow and coil function set.

Function blocks are program elements with special functions. Examples: Timing

relays, time switch, data block comparators. Function blocks are provided with or

without contacts and coils. How a safety or standard function block is added to the

safety or standard circuit diagram and parameterized is described in

→ Section "Working with function blocks", page 217

In RUN mode the function blocks are processed according to the circuit diagram and

the results are updated accordingly.

Timing relay = Function block with contacts and coils

Time switch = Function block with contacts

Relays are switching devices that are emulated in easyE4 device electronically,

which activate their contacts according to the assigned function. A relay consists of

at least one coil and contact.

easyE4 02/24 MN050009EN Eaton.com

5. Programming on the device

5.3 Circuit diagram elements

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