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Welcome to CADe SIMU electrical circuit simulator 
tutorial.

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With this simulator we can test the circuit 
we are designing

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before doing the hardware assembly and wiring.

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By using a simulator we are certain that 
the control sequence that we design works

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and will save us time as well as avoid trial 
and error on actual wiring.

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This is also useful for those learning

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how to design motor controls, plc program 
and pneumatic circuits.

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Let us simulate the Siemens Logo! program 
on the screen.

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Click the play button to start simulation.

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Click the start pushbutton,

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we can see that the motor runs.

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On the Siemens Logo! screen we can see which 
inputs and outputs are On.

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In the plc ladder program we can also see 
sequence of operation

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of the logic circuit when the input devices 
are manipulated.

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Click on the Over Load Relay heater,

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As we can see the NO contact at the Logo! 
input is closed while the NC contact at the 
output opened.

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The CADe SIMU circuit simulator is a free 
software and can be

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downloaded from the link found on the description 
below.

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This can be installed in personal computer 
only

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and cannot be used as mobile phone application.

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Once you have clicked on the link on the 
description below

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you will be directed to the download page.

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Just click the download button.

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Once the download has been completed open 
the download folder

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Extract the compressed file to open the application.

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The CADe SIMU simulator has a password and 
that is '4962'.

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Zoom in so that the images or objects will 
become bigger.

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The working space can also be adjusted in 
the settings.

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For larger circuit design choose bigger paper 
size format or custom.

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The simulation speed can be adjusted to easily 
follow

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the sequence of the circuit especially the 
movement of contacts.

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This is an A3 size working space.

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Here we can see different electrical symbols.

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This symbol is for power supply.

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We will select from here the ac power supply 
of the circuit, single or three phase

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There is also positive and negative or dc 
power supply.

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This are the transformers and dc rectifiers.

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These are the fuses and fused disconnect 
switches.

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These are the circuits breakers,

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heater for overload relay

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These are the electric motors.

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These are the power components for reduced 
voltage starter

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Auto transformer for reduced voltage auto 
transformer starter,

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Resistors for primary resistance starter 
or closed transition wye delta starter,

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This is the solid state starter such as the 
softstarter,

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this is the power section of the variable 
frequency drive

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and this is the control section.

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These are the auxiliary and time contacts.

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These are the different kind of switches.

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Momentary pushbutton, mushroom head pushbutton 
and maintained contact pushbuttons.

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Selector or change over switches

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This is the intermediate switch for IEC or 
european standard or the four way switch 
for american standard.

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These are the limit switches,

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These are the auxiliary contacts for the 
overload relay.

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These are the sensors, inductive and capacitive 
proximity sensors, magnetic or reed switch,

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photoelectric sensor and pressure sensors.

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These are the relay coils, indicators and 
buzzers.

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Contactor or relay coil,

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2 coil latch relay,first coil for set and 
second coil for reset.

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Step relay or impulse relay

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Solenoid coil for solenoid valves,

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On delay timer

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Off delay timer

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Pilot lights or indicator lights

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bell, buzzer, siren or and horn.

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These electronic relays are the solid state 
relays (SSR) and phase monitoring relays.

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These are the function blocks for fbd plc 
logic programs,

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these symbols are for plc ladder programming.

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Grafcet is a graphical programming following 
a sequential flow diagram.

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IO devices, here we can use the Siemens LOGO! 
or the Siemens S7-1200 plc to design a program.

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These are pneumatic circuits with basic actuator 
and valves setup.

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These are the cables and connections.

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These are input and output connector used 
to simplify connection especially in avoiding 
crossing connections.

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We will make a simple circuit with siemens 
logo program.

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To easily connect the components and have 
a clear view zoom in the screen.

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To exit from the selected object, press Esc 
key.

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To connect the objects with wire, click on 
the end of the component

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and drag the mouse up to the desired location.

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Add the normally open start pushbutton

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then normally closed stop pushbutton.

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Normally Open overload relay auxiliary

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Double click to edit the label.

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Add normally closed overload relay auxiliary 
at output Q1,

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then the coil for the magnetic contactor.

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Add a pilot light on output Q2.

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The wiring diagram for the input and output 
devices of the Siemens Logo is now complete.

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Next we will make the Seimens Logo! ladder 
program.

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Click the ladder toolbar and select the normally 
open contact for the starp pushbutton input.

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Then anothe rnormally open contact for the 
stop pushbutton.

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Normally close contact for the overload auxiliary,

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and output coil for the contactor.

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Another output coil for the pilot lamp.

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Add the positive and negative supply bus.

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We need a holding contact for the output 
coil.

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Now we will edit the labels of the devices.

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Start pushbutton is connected to I1, therefore 
this contact will be labeled as I1.

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I2 for the contact where stop pushbutton 
is connected.

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I3 for the overload load input connection.

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Those are the input address for the Siemens 
Logo!

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Label Q1 for the contactor output coil output 
connection.

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Q2 for the pilot lamp output connection

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The holding or latching contact should be 
Q1.

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Now we will test the program.

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Click the simulation button.

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Close the power supply circuit breaker.

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We can see that the normally open contact 
for the stop pushbutton input has closed.

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That is because the input is normally closed 
and therefore we have a logic 1 in the controller 
input.

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Click the start pushbutton,

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As we can see the output coils Q1 and Q2 
are activated.

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In the wiring diagram there is a problem 
in the output side.

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The contactor coil is not energized because 
the normally closed overload contact in series 
with it is opened.

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because the label is the same with the circuit 
breaker.

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So one we close the circuit breaker, this 
overload contact will open.

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We will change the overload auxiliary contact 
label at the output to OL1.

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then the circuit breaker as QM1.

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It is important that labels are correct so 
that the circuit will work properly.

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We will simulate again the circuit.

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We can see that the contactor coil is activated.

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This time we will make the power diagram 
with the motor.

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Stop the simulation and click the power toolbar.

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Add a three phase power supply.

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Add a three pole circuit breaker.

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Add a three pole contactor.

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Add the heater for the overload relay.

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Lastly the three phase motor.

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Start the wiring connections.

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Take note that devices should not be connected 
directly

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or each ends are touching, otherwise it will 
not have a connection.

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There should be a space between them and 
connected with wires.

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Start labelling according to the control 
circuit.

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We will simulate again the circuit.

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As we can see when the contactor coil is 
energized, the contacts are closed.

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If we click the stop button, this contact 
will open.

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The output coils are turned off.

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Now we will simulate tripping the overload.

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The overload normally open contact at the 
input closes,

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thereby opening the overload input contact 
at the ladder program.

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At the output of the Siemens Logo! the normally 
closed overload contact is opened.

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Why did we put an overload contact here?

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The purpose is for failsafe operation.

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For example the ladder program is corrupted 
or there is a problem with the controller,

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if there is an overload and we do not provide 
an overload contact here,

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the contactor coil might remain energized

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To ensure that the contactor will deenergize 
in case of an overload,

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there should be an oveload auxiliary contact 
in series with the contactor coil.

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This overload contact in the input is for 
stopping the logic in the ladder program

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and also for indication and monitoring of 
overload.

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The grid points can be turned off from the 
View menu.

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That is all for the introduction on how to 
use the CADe SIMU electric simulator.

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We can simulate different circuits like electromechanical 
motor starter

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or other controllers like softstarter and 
variable frequency drives.

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PLC programs for Siemens Logo! and S7-1200 
can also be designed and simulated.

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Watch out for more video tutorials for CADe 
SIMU electrical circuit simulator.

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Thank you.