User Manual

easy800 operation

08/04 AWB2528-1423GB

Program

A program is a sequence of commands which the easy800

executes cyclically in RUN mode. An easy800 program

consists of the necessary settings for the device, easy-NET,

password, system settings, a circuit diagram and/or function

blocks.

The circuit diagram is that part of the program where the

contacts are connected together. In RUN mode a coil is

switched on and off in accordance with the current flow and

the coil function specified.

Function blocks

Function blocks are program elements with special

functions. Example: timing relays, time switches, arithmetic

function blocks. Function blocks are provided with or

without contacts and coils accordingly. In RUN mode the

function blocks are processed according to the circuit

diagram and the results are updated accordingly.

Examples:

Timing relay = function block with contacts and coils

Time switch = function block with contacts

Relays

Relays are switching devices which are electronically

simulated in easy800. They actuate their contacts according

to their designated function. A relay consists of a coil and at

least one contact.

Contacts

You modify the current flow with the contacts in the easy800

circuit diagram. Contacts such as make contacts carry a 1

signal when closed and 0 when open. Every contact in the

easy800 circuit diagram can be defined as either a make

contact or a break contact.