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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.
