北京电子科技职业学院
- The system start and stop control process includes power on initialization, abnormal state detection, system status display, system readiness check and system start / stop operation.（ ）
- According to the professional technical specifications for the installation and commissioning project of the automatic production line, the first binding band is 60 mm + / - 5 mm away from the connection of the air pipe joint of the solenoid valve group, and the binding of the first binding band in the following picture meets the requirements.（ ）
- When YL-335B workstations are running online, the process of each station is basically fixed, which is not different from the process control program of single station program. In order to modify and compile the on-line operation program based on the single station program, it is important to consider the network configuration, the information exchange in the network, and the information exchange between the master station and the man-machine interface.（ ）
- The two sub processes constitute the whole working process of the assembly unit. If the stop command is issued during the operation of the system, the system can stop only after the two sub processes return to their initial steps. Therefore, the initial step of each subprocess must contain the information of stop instruction, so that the subprocess that first returns to the initial step cannot meet the step transition condition and stops at the initial step.（ ）
- The main function of YL-335B conveying unit is to control the grab manipulator to complete the work transmission. The key to achieve accurate transmission is to accurately determine the position coordinates of the material table in the work units of assembly, processing and sorting.（ ）
- From the working process of sorting unit, the programming of high-speed counter only requires that it can receive the pulse signal of rotary encoder for counting, provide the displacement information of workpiece on the conveyor belt, and reset the high-speed counter used. The more complex functions of high-speed counter, such as interrupt processing when preset value is reached, are not needed.（ ）
- In the embedded version of MCGS, each application system can only have one main control window and one device window, but it can have multiple user windows and multiple running strategies. There can also be multiple data objects in the real-time database. MCGS embedded version uses the main control window, device window and user window to form a human-computer interactive graphical interface of the application system, configures and configures various types and functions of objects or components, and can also visualize real-time data.（ ）
- The connection of rotary encoder used in sorting unit is as follows: ① the white outgoing line is phase a line, green outgoing line is phase B line. ② The positive power lead (red) of the encoder must be connected to the + 24 V regulated power supply terminal of the device side connection port, which is not be connected to the power terminal Vcc with internal resistance.（ ）
- Frequency converter is a kind of device which transforms the fixed frequency (usually frequency frequency of 50 Hz) alternating current (three-phase or single-phase) into three-phase AC power supply with continuously adjustable frequency (mostly 0-400 Hz).（ ）
- The operation strategy itself is a framework provided by the system, in which the "policy line" composed of policy condition components and policy components is placed. Through the definition of the operation strategy, the system can operate tasks according to the set sequence and conditions, whi41. True or false (2 scoes): MCGS embedded script program provides a convenient way for programming various specific process control programs and operation processing programs. By using script language, the flexibility of the whole system can be enhanced, and the problems that are difficult to be solved by the conventional configuration method can be solved.（ ）
- The count input, external reset and set input signals of the high-speed counter come from 8 input points, such as X000-X007. Each high-speed counter has its corresponding X-port. That is, after the high-speed counter Cxxx is specified, the corresponding X-input is designated, and the designated X-input cannot be used by other high-speed counters.（ ）
- If the user encounters problems in the parameter debugging process and wants to start debugging again, the operation method of parameter clearing or initialization can be used. In the parameter setting mode, use the M knob to select the parameter No. as Pr.CL (parameter clear) and ALLC (parameter clear), set their values to 1 to return the parameters to their original values.（ ）
- N: N network is based on RS485 transmission standard. There must be one PLC as master station and other PLCs as slave station. The total number of stations in the network should not exceed 8. The communication protocol of the network is fixed: half duplex communication is adopted, and the baud rate (bps) is fixed at 38400 bps; the data length of 7 bits, even check, stop b98. True or false (2 scores): Besides programming port, PLC of FX series has no built-in communication port, so it is necessary to insert RS-485 communication interface board into the interface of special function expansion card to expand its communication function. The interface board model PLC of FX3U series is FX3U-485-BD with the maximum extension distance of 50m.（ ）
- In automatic production line, proximity switch is usually connected with PLC input as signal input element. Before wiring, the signal output and the positive and negative outgoing lines of the power supply should be identified first, which can be distinguished by colors according to the relevant international standards: Brown is the positive pole of the DC circuit, blue is the negative pole, and black is the signal output line.（ ）
- The PLC of the conveying unit adopts transistor output. When wiring, pay attention to the power polarity of the output common terminal. For PLC of FX (H2U) series, the output common terminal is connected with the negative pole of the power supply; for PLC of S7-200 series, the output common terminal is connected with the positive pole of the power supply.（ ）
- The control program structure of each work unit of YL-335B can be basically divided into two parts: one is the control of system start / stop, including power on initialization, fault detection, system status display, check whether the system is ready and the operation of system start / stop; the second is the step sequence control of process after system startup, which is the main control process of work unit.（ ）
- The photoelectric proximity switch is mainly composed of light transmitter and light receiver. If the light emitted by the light emitter is masked or reflected due to different objects detected, the amount of light reaching the light receiver will change. The sensing element of the optical receiver will detect this change and convert it into an electrical signal output.（ ）
- Taking YL-335B automatic assembly line of Yalong Company as the teaching carrier, students and enterprise employees are trained to master the mechanical installation and adjustment, circuit design and connection, equipment parameter field setting, human-machine interface configuration, control programming and debugging, and equipment troubleshooting ability from simple to complex, from single station to the whole line.（ ）
- The servo driver has various parameters to set its characteristics and functions. The parameters can be divided into seven categories: Class 0 (basic setting); category 1 (gain adjustment); class 2 (vibration suppression function); class 3 (speed, torque control, full closed loop control); class 4 (I / F monitor setting); class 5 (extended setting); class 6 (special setting). The method of setting parameters is to set the parameters on the special debugging software after connecting with PC and on the front panel of the driver. The servo parameters of YL-335B are not set much, only on the front panel.（ ）
- The configuration of N: N communication network of FX or H2U system is mainly realized by setting network parameters by programming for PLC of each station. The programming is very simple. In step 0 of the program, M8038 can be used to write the corresponding parameters to the special data registers D8176-D8180 of the master station, and the station number of the slave station register D8176. However, it must be ensured that this program is written from step 0 as the N: N network parameter setting program and ends when any instruction or device that is not part of the above program is executed. This program segment does not need to be executed. It becomes effective automatically when it is programmed into this position.（ ）
- Since the working current of encoder used in sorting unit reaches 110mA, attention should be paid to the positive power lead (red) of encoder must be connected to + 24V regulated power supply terminal at the device side connection port, and should not be connected to the power terminal VCC with internal resistance. Otherwise, the voltage drop of working current on the internal resistance is too large, so that the encoder can not work normally.（ ）
- The difference between double electric control solenoid valve and single electric control solenoid valve is that for single electric control solenoid valve, when there is no electric control signal, the valve core will be reset under the action of spring force, while for double electric control solenoid valve, when there is no electric control signal at both ends, the position of valve core depends on the action result of the previous electric control signal.（ ）
- Using single button to start and stop can save PLC input points and buttons, and also simplify the layout of operation panel, and the PLC program to realize it is not complicated (such as using relay to realize this circuit is more complex). Therefore, this is a very common method of start stop control in engineering.（ ）
- The working process of installation and debugging of feeding unit is as follows: installation of mechanical parts → connection and adjustment of gas path → circuit wiring → sensor debugging and circuit checking → programming and debugging of PLC.（ ）
- All kinds of PLC programming software have on-line monitoring function, but the forms and functions are different. Online monitoring can be carried out in "STOP" or "RUN" mode, but only I / O point status monitoring can be carried out in "STOP" mode, not the operation of the program.（ ）
- It is one of the methods to implement the engineering task that the man-machine interface configuration is carried out first, then the PLC programming data is planned and the program is further compiled. Its advantage is that the man-machine interface has passed the simulation test, and the data object of the real-time database provides a certain basis for the planning of PLC network variables and intermediate variables, which makes the planning more intuitive and operable.（ ）
- Before programming, a test program should be written and run to test the pulse number of each specific position on the conveyor belt (including the center position of each pusher cylinder and the exit position of the detection area) to obtain the coordinate value of each specific point to the feed inlet center point as the reference origin. When the control program is further compiled, the coordinate value data obtained from the test is stored as the known data for the program to call.（ ）
- If YL-335B equipment is in operation, it may lead to equipment damage accident, so the parameter pr5.04 is set to 2. At this time, the servo motor stops immediately. Only when the overtravel signal is reset and the driver is powered on again after power failure, the alarm can be reset.（ ）
- The function of the workpiece pushing device is to push the workpiece at the bottom of the silo onto the discharge table. Working principle of the device: when the workpiece needs to be pushed out to the material table, the piston rod of the ejector cylinder is pushed out to press the lower workpiece; then the piston rod of the pushing cylinder is pushed out to push the lowest workpiece onto the material table. After the pusher cylinder returns to its position, the ejector cylinder returns to release the next lower workpiece. In this way, the next movement of the workpiece is ready for the next time.（ ）
- The control circuit of frequency converter generally includes input circuit, output circuit and auxiliary interface, etc. The input circuit receives the command signal (switching value or analog signal) of the controller (PLC), and the output circuit outputs the status information of the frequency converter (switching or analog output in normal condition, abnormal output, etc.), and the auxiliary interface includes communication interface, external keyboard interface, etc.（ ）
- The pneumatic technology is an engineering technology that uses compressed air as power source to transmit energy or signal. It is one of the important means to realize various production control and automatic control.（ ）
- The checking and mapping of electrical control circuit wiring is an important part of electrical installation and maintenance engineering. In practical engineering, it is a very practical method to check or map the I/O wiring of PLC with the help of the state monitoring function of PLC. Among them, the forced output function of soft component test is particularly suitable for the test of single point load, such as the output load of PLC is solenoid valve coil, relay contactor coil, indicator light, etc. For the test and verification of the input point, the proximity switch can also be activated or reset manually. The input point assignment of the proximity switch can be determined according to the status of PLC input point indicator light on or off. However, this observation method is easy to make mistakes, and it is better to use programming software.（ ）
- The servo system has a good tracking ability to the given position signal, so it can still accurately reach the target position when it runs again after suspension.（ ）
- Three different types of graphic objects can be placed in the user window: primitives, symbols, and animation components. By placing different graphic objects in the user window, users can construct various complex graphical interfaces and realize the "visualization" of data and process in different ways.（ ）
- The online monitoring function is based on the premise of ensuring the normal communication between the programming software and PLC. Therefore, a new project should be created first, and then the communication test between the programming software and PLC should be carried out. Only when the test is successful can I / o point status monitoring be implemented.（ ）
- The general frequency converter usually uses the AC-DC-AC mode to convert the power frequency alternating current into three-phase AC with adjustable frequency and voltage, that is, the power frequency alternating current at the power grid side is first rectified into direct current, and then the direct current is converted into the alternating current with controllable frequency and voltage.（ ）
- The origin proximity switch is an inductive proximity sensor. Its installation position provides the origin information of linear motion. Both the left and right limit switches are micro switches with contacts, which are used to provide protection signals in case of overtravel fault: when the sliding slide passes the left or right limit position in motion, the limit switch will act, thus sending the overtravel fault signal to the system.（ ）
- The servo system in YL-335B equipment works __________in the system.（ ）
- _____________is the origin regression command.（ ）
- _____________ is a kind of non-contact position detection switch, which has the advantages of no wear and damage to the detection object. It is often used to detect the existence of magnetic field or magnetic material.（ ）
- __________diffuse reflection photoelectric sensors were used in the transfer unit (E3Z-LS63 type).（ ）
- The PLC of sorting unit is the controller (PLC) produced by Mitsubishi company, and its model is _________.（ ）
- _____________is the absolute position control command.（ ）
- RM terminal represents________ in the terminal distribution diagram of Mitsubishi Inverter with model FR-740.（ ）
- For PLC of FX3U series, the DECO instruction is______________Instructions.（ ）
- _____________ is a kind of sensor which converts the mechanical and geometric displacement output to the shaft into pulse or digital signal through photoelectric conversion. It is mainly used for the detection of speed or position (angle).（ ）
- ___________is used to produce enough pressure and flow of compressed air and its purification, treatment and storage of a set of devices.（ ）
- __________principle is used for photoelectric proximity switch (referred to as photoelectric switch), which is used to detect the presence of objects and surface state changes, etc.（ ）
- The action sequence of the manipulator to grasp or put down the workpiece in different stages is the same___________ will simplify the programming.（ ）
- The PLC in the processing unit is connected to ________________input device____________________output device.（ ）
- The working power supply for the tpc7062k MCGS touch screen is______________V.（ ）
- The pneumatic finger (air claw) is used to grasp and clamp the workpiece.Air claw usually has sliding guide type, fulcrum open close type and rotary drive type, _______________pneumatic fingers is used in the machining unit. （ ）
- According to the professional specification requirements of gas connection, the incorrect description is ______________（ ）
- In the parameter setting of Mitsubishi frequency converter with model fr-740, the parameter pr.2 is set as ______________.（ ）
A:错 B:对
答案:对
A:对 B:错
答案:对
A:错 B:对
答案:对
A:错 B:对
答案:对
A:对 B:错
答案:对
A:对 B:错
答案:对
A:错 B:对
答案:对
A:对 B:错
答案:对
A:对 B:错
答案:对
A:错 B:对
A:对 B:错
A:错 B:对
A:错 B:对
A:错 B:对
A:错 B:对
A:错 B:对
A:对 B:错
A:对 B:错
A:错 B:对
A:对 B:错
A:对 B:错
A:错 B:对
A:对 B:错
A:对 B:错
A:错 B:对
A:对 B:错
A:对 B:错
A:错 B:对
A:对 B:错
A:对 B:错
A:错 B:对
A:错 B:对
A:对 B:错
A:错 B:对
A:错 B:对
A:错 B:对
A:对 B:错
A:Speed control mode B:Torque control mode C:Frequency conversion control mode D:Position control mode
A:DZRN B:DDRVA C:PLSV D:DDRVI
A:Photoelectric proximity switch B:Magnetic switch C:Microswitch D:Travel switch
A:1 B:3 C:2 D:4
A:FX3U-32MT B:FX3U-48MT C:FX3U-32MR D:FX3U-48MR
A:DDRVI B:DZRN C:PLSV D:DDRVA
A:Forward control terminal B:High speed control terminal C:Medium speed control terminal D:Low speed control terminal
A:Positioning B:Comparison C:Decoding D:Transmission
A:Magnetic switch B:Inductive proximity switch C:Rotary encoder D:Photoelectric proximity switch
A:Sensors B:Solenoid valve C:Cylinder D:Air source device
A:Inductance effect B:Photoelectric effect C:Magnetic induction effect D:Hall effect
A:Master command B:Jump instruction C:Subroutine call D:None of the above is true
A:6,10 B:10,6 C:10,10 D:6,6
A:DC 220 V B:AC 220 V C:DC 24 V D:AC 24 V
A:Sliding guide type B:Rotary drive type C:None of the above D:Fulcrum open close type
A:The first binding tape is 80 mm + / - 5 mm away from the connection of the air pipe connector of the solenoid valve group. B:When connecting, pay attention to the direction of the air pipe, which should be arranged in order, and there is no air pipe in the trunking.The air pipe should be inserted tightly in the quick connector, and there should be no air leakage. C:After the gas path is connected, it shall be bound with binding tape, and the distance between the two binding bands shall not exceed 50 mm.Cables and gas pipes shall be bound separately, but when they are all from the same mobile module, they are allowed to be bound together. D:There is no windpipe winding and binding deformation.
A:Upper limit frequency B:Lower limit frequency C:Deceleration time D:Acceleration time
温馨提示支付 ￥5.00 元后可查看付费内容,请先翻页预览!
