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http://www2.sea.siemens.com | Set 3 | 2007-12-12
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LOGO! Power (24 V/1,3 A), Primary-Switched Power Supply
For the power supply of logic and sensor components
LOGO! (12/24 RC), Logic Module
Detection, evaluation and processing of sensor signals, PI control, and plain text display of messages
SIMATIC PXS300 Proximity Switch, Sonar
Easy and reliable ultrasonic distance detection using ultrasound technology, conversion into a frequency
signal that is proportional to distance
SIRIUS 3RT10 Contactor
Motor switching
SIRIUS 3RV Circuit-Breaker
Overload protection for motor
Automation task:
Plastic parts are to be produced in a factory. The plastic granulate is transported from a central silo via a line into a tank at the injection molding machine. From there it is fed into the production process via a valve.
A level monitoring for the store tank is to ensure the availability of the plastic granulate for the injection molding machine, and automate the granulate transport from the silo by means of the compressor.
Monitoring the filling level as well as automatic filling of the tank with plastic granulate is meant to reduce production downtimes. The motor of the compressor shall only be switched on when the minimal filling height of the tank is fallen short of, and be operated at setpoint speed. Underrun of the minimum filling level height is to be displayed as a message on a text display.
Automation solution:
A LOGO! is installed in the automation solution. A logic module is used as a controller. An ultrasonic sensor is used for filling level monitoring and it is connected to a frequency input at the LOGO! logic module.
A threshold switch realized in the LOGO! control program evaluates the various signals of the ultrasonic sensor and controls the asynchronous motor connected via a contactor (compressor).
The automation solution fulfills the following operating requirements:
Simple changing of filling level monitoring thresholds
Detached operating unit with filling level display
Manual on and off switching of the compressor motor
Messages or alarms for shortage of raw materials
Startup Code
For the startup we offer you software examples with test code and test parameters as download. The software examples support you during the first steps and tests with your Micro Application Sets. They enable quick testing of hardware and software interfaces between the products described in the Micro Application Sets.
MAS3 LOGO Startup Code
MAS3 Technical Manual
Applications
The Micro Automation Set is especially suited for distance and level measurements in the industrial environment, e. g.:
Stack height detection
Silo filling with fluids or solids
Level monitoring
Pump control
Collision protection
Distance monitoring for conveying equipment