APC-900 Modular Automatic Process Controls Vocational Training Equipment Process Control Trainer
The system enables the training of instrument technicians and users in the field of industrial process controls. In particular, it is suitable to study courses where the familiarization with the concepts of process, regulation and stability are required. TRAINING PROGRAM: • Analysis and calibration of the signal conditioners • Detection of the characteristic curve of the transducers • Determination of the linearity of the transducers • Determination of the response delay of transducers andsignal conditioners • Analysis of the On/Off, three-state, proportional, integrativeand derivative actions of the controller • Detection of the transfer functions of the power amplifiers • Determination of the time constants of the single processes • Controller set-up according to: - response at stability limit - process index response - process frequency response • Detection of the closed-loop processes response with On/Off or Three-state controller • Detection of the closed-loop processes response with P, P+I,P+D, P+I+D controller • Open loop processes: comparison of the responses withclosed-loop processes • Comparison of the sensitivity to the open-loop andclosedloop load variations • Detection of the permanent state error and the processes,according to the used controller • Detection of the transient state behavior of the processes,according to the controller time constants TECHNICAL SPECIFICATIONS: The system is considered in the different subdivisions ofgroup of modules and components, so to enable the users toconfigure the equipment according to their needs. Basic system It provides the essential units to carry out the process controland is common to all the analyzed processes. Besides thepower supplies and the module-holder frame, it includes themodule to provide the SET-POINT signal to the process, theP.I.D. controller module for the proportional, derivative andintegrative actions, the module for ON/OFF control with 2- or3-position module and display module for the analog signals viaLED diode bars. It consists of: • Module-holder frame mod. VF2 • Power supply: 115/230 Vac ±10%, 50/60 Hz; outputs: ±12Vdc/0.5A, 24 Vac/5A, +5 Vdc/2A, 30 Vdc/5A mod. MU5A • Analog set-point module SP-1 • P.I.D. controller module PC-1 • 2 and 3-position controller module PC-2 • Voltage indicator module VI-1
Temperature process mod. PT The process unit includes thethermal actuators consistingin a double resistor and a fan and three different kinds ofusable industrial temperaturetransducers (PTC, RTD and thermocouple). Beside the basic modules ofthe system, there is the poweramplifier module for heating and cooling actuators and theconditioning modules of the signals provided by the three kindsof usable sensors. The system includes: • Process unit PU-1 • Amplifier module PA-1A • Signal conditioner module for P.T.C. SC-1A • Signal conditioner module for RTD SC-1B • Signal conditioner module for thermocouple SC-1C Level and flow process mod. PLP The process unit consists of a tank with pump to provide theliquid necessary to reach and keep the level. The actuatorconsists of a proportional valvewhile the level transducer consists in a pressure sensorset at the bottom of theprocess tank. A windmillflowmeter with a manualthrottle valve set in series onthe delivery pipe enables tocarry out flow measurements. Beside the basic modules ofthe system, there is the poweramplifier module for the level and flow actuators and theconditioning modules of thesignals provided by the two level and flow transducers. The system includes: • Process unit PU-2 • Amplifier module PA-2 • Signal conditioner module for level transducer SC-2A • Signal conditioner module for flow transducer SC-3A Pressure process mod. PP The process unit consists of a tank and a compressor activatedby an electrical motor providing the air necessary to reachand keep the pressure. The actuator consists ofa proportional valve andthe pressure transducer ispiezoresistive. Besides the basic modulesof the system, there isalso a power amplifier for the pressure unit and theconditioning modules of thesignals for the pressure transducer. -APC900-0 The system includes: • Process unit PU-4 • Amplifier module PA-2 • Signal conditioner module for pressure transducer SC-4A Angular speed process mod. PV The process unit consists of a bidirectional permanent magnetsd.c. motor. A tachogenerator and an incremental encoder ofoptical kind – which are the transducers - are splined on theaxis. The actuator consistsof a DC motor. Beside the basic modulesof the system, there is thepower amplifier module forthe angular speed and theconditioning modules of thesignals for the speed andangular position sensors. The system includes: • Process unit PU-6 • Amplifier module PA-6 • Signal conditioner module for tacho-generator SC-6A • Signal conditioner module for feedback reaction SC-6B • Signal conditioner module for photoelectricspeed transducer SC-6C Linear position process mod. PPL The microprocessor position control drives the motion of asingle-axis translator by reading from bidirectional incrementalencoder. The microprocessor controller is the processing unit of theposition control and is complete with display and keyboardfor data insertion and display. A D/A converter module is usedto control the analog section of the position control while asecond module enables the display of the logic state of theoutput lines of the microprocessor controller. There are alsothe conditioning modules for the speed and position sensors. Beside the base modules, the system includes: • Process unit PU-7 • Amplifier module PA-6 • Microprocessor digital control module CU-1 • Display and keyboard for module CU-1 DK-1 • 12-bit D/A converter module DA-1 • 8-bit I/O module IO-1 • Signal conditioner module for tachogenerator SC-6A • Signal conditioner module for incrementalencoder SC-7A Luminosity process mod. CPL The process unit consists of a dark chamberwhere the actuator of the lightprocessing is inserted whichconsists of an incandescentlamp and three semiconductorluminosity transducer devices. Beside the basic modules ofthe system, there is the poweramplifier module for the luminosity unit and the conditioningmodules of the signals for the sensors. The system includes: • Process unit PU-9 • Amplifier module PA-9 • Signal conditioner module for photoresistor SC-9A • Signal conditioner module for photodiode SC-9B • Signal conditioner module for phototransistor SC-9C Force transducer mod. TF The system consists of a strain gaugeload cell and a conditioning modulefor the generated signal. Beside themodule-holder frame and the powersupply, the system includes: • Force transduction unit TU-5 • Signal conditioner module for loadcell SC-5A Linear shift transducer mod. TSL The system consists ofan L.V.D.T. (Linear VariableDifferential Transformer)and potentiometricposition tranducer and theconditioning modules ofthe generated signals. Beside the moduleholder frame and thepower supply, the systemincludes: • Position transduction unit TU-7C • Signal conditioner module for L.V.D.T. SC-7C • Signal conditioner module for linear potentiometer SC-7D Proximity sensors mod. SP The system consists of a linear inductive proximity sensor, anON/OFF inductive sensor and an ON/OFF capacitive sensorand the conditioning modules for the generated signals. Besidethe module-holder frame and the power supply, the systemincludes: • Proximity transduction unit TU-8 • Signal conditioner module for linear inductive sensor SC-8A • Signal conditioner module for On-Off inductive sensor SC-8B • Signal conditioner mod. for On-Off capacitive sensor SC-8C PERSONAL COMPUTER INTERFACING To detect the data from the transducers and the actuators ofthe processes, an acquisition interface is used which providesa set of analog, digital interfaces, counters and timers. The DMA input/output functions (direct access to the CPU)and simultaneous input/output control for command/responseapplications (signal acquisition from transducers, signal transmission of control signals to the actuator…) are alsosupported. • Industrial interface card mod. MFI-U