S7-200 Motion Control.pptVIP

Applications of Motion Controls Motion Control is very important in a wide range of industries Examples for primary Applications: Conveyor Belts, Feed-to-Length, Cut-to-Length Automated Assembly or Placement, Material Handling Equipment Automated Warehouses, Packaging Textile Machines, Mixers, Dispensing, Welding Examples for secondary Applications: Stamping, Robots, Extruding, Molding Lathes, Spindles, Drilling/Milling Pumps, Fans, Ventilation Elements of Motion Control Systems Controller: The “Brain” of the System. It sends low-power signals to the Driving Circuit (Driver) for Position or Speed/Torque Control. In closed-loop systems it also receives Feedback Information. Driver: Power Amplification Device that supplies the needed current to drive the Motor (matched to a Specific Motor Type) Motor: DC or AC Motor to Generate Mechanical Motion out of Electric Energy The S7-200 EM 253 in a Motion Control System The S7-200 feeds logic control signals to drives, it doesn’t analyze data from encoders. However, it receives information from switches like limit or reference point switches. Motion Control with the S7-200 CPU Motion Control with the S7-200 EM253 Module The EM253 controls one axis with up to 200 kHz Pulse Frequency The Module Configuration is completely stored in PLC Memory Module Inputs (Digital) Stop Input Reference Point Switch Input Zero Pulse Input Negative and Positive Limit Switch Input Module Outputs (Digital) Pulse Output 0 Pulse Output 1 Disable Output (Drive Amplifier Shutdown) Clear Output (Amplifier Deviation Counter Clear) The Module has built-in Reference Point Seek functions Hardware Description: EM253 Module – Input Side All Inputs are located at the Bottom of the Module as shown to the Right. The four inputs are STOP, RPS, LMT and ZP Inputs are rated at 24V The STOP Input is connected to an Emergency Stop Circuit or Switch to shut down the Drive The RPS (Reference Point Switch) Input is connected to a Switch or Sensor detecting the