CN216486120U - Control program test cabinet for heat exchanger unit - Google Patents

Abstract

The utility model discloses a control program test cabinet for a heat exchanger unit, which comprises a display, a touch screen, a signal generator, a switch, a controller, a computer, a change-over switch and a universal meter, wherein the signal generator outputs current, voltage or resistance signals to a tested PLC (programmable logic controller) to realize analog input; this scheme of use can debug whole unit control cabinet in the workshop. The automatic control engineer of the unit manufacturer can find and remove basic hardware and program problems in a workshop, so that a large amount of time is saved for field debugging, and the debugging cost is reduced.

Description

Control program test cabinet for heat exchanger unit

Technical Field

The utility model belongs to the technical field of heat exchanger unit control cabinets, and particularly relates to a control program test cabinet for a heat exchanger unit.

Background

The heat exchanger unit control cabinet basically uses a PLC as a control core, and different control modes and PLC program logics are usually provided for finishing different user requirements. Usually, a technician of a heat exchanger unit manufacturer can perform power-on debugging on the unit before leaving a factory so as to ensure that a program control logic meets requirements and detect whether a wiring error exists in a control cabinet. However, in the busy production season, the problems that whether a control program is in a production workshop cannot be tested due to the fact that sensors, actuators or other elements cannot be installed in place due to shelf life tension or other reasons, whether control logic and PID parameters are appropriate or not and the like are caused inevitably, all the problems are concentrated on a field debugger due to the fact that the problems are caused, and the debugging work difficulty and the debugging cost are increased.

However, when a busy season comes, problems that goods cannot be timely obtained and the like may occur to control equipment on the unit, so that the power-on test cannot be performed. Therefore, all possible problems (such as wiring errors, component faults in the control cabinet, PLC channel faults, program logic errors, PID parameter setting and the like) in the cabinet and on the unit are concentrated on the user site for detection and solution.

Most of field debugging is 1 person, and field conditions are complex, for example, lighting, telecommunication signals and the like can not be in place when equipment runs, the network and telephone help is inconvenient to seek due to the difficult problem of programs, a great amount of time and energy which are possibly wasted are very easy to process, the field processing problem is inconvenient, the problem of small accessories is often required to be purchased and replaced all day long, and the debugging efficiency is reduced. In addition, for a heat exchanger unit manufacturer, the technical level requirements of field debugging engineers are also higher. From the points, debugging cost is increased invisibly, debugging efficiency is low, and therefore the control program test cabinet for the heat exchanger unit is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a control program test cabinet for a heat exchanger unit, which aims to solve the problems in the background technology.

In order to achieve the purpose, the utility model adopts the following technical scheme: the utility model provides a control program test cabinet for heat exchanger unit, includes display, touch-sensitive screen, signal generator, switch, controller, computer, change over switch and universal meter, signal generator output current, voltage or resistance signal realize analog input to being surveyed PLC, and the computer is connected with the controller and monitors analog theoretical value and the universal meter and record analog actual value and compare, and change over switch is with active or passive digital input signal to being surveyed PLC, and the computer is connected with the controller and monitors digital theoretical value and the universal meter and measures digital actual value and compare.

Furthermore, the alternating current power supply is respectively connected with the controller power supply, the signal generator power supply and the touch screen power supply and supplies power.

Furthermore, T1 of the controller is connected with a controller power supply, T2 is connected with an analog quantity input circuit, T3 is connected with an analog quantity output circuit, T4 is connected with a digital quantity input circuit, and T6 and T7 are connected with a digital quantity output circuit.

Furthermore, the touch screen is connected with the PLC to be tested through a network cable.

Furthermore, circuit breakers are installed on lines of power distribution, and rated current of each circuit breaker is 2A.

Furthermore, the output end of the computer is connected with the display.

Furthermore, the touch screen receives the set data and outputs the set data to the computer.

Furthermore, the controller is connected with the switch and the computer through an RJ45 interface.

Compared with the prior art, the utility model has the beneficial effects that:

1. this application is for simulating on-the-spot operational environment in the workshop, and this scheme of use can debug whole unit control cabinet in the workshop. The automatic control engineer of the unit manufacturer can find and remove basic hardware and program problems in a workshop, so that a large amount of time is saved for field debugging, and the debugging cost is reduced.

2. The simulation device can simulate various environments, can simulate various field signal types, and is common signals of the heat exchanger unit, for example, an analog input signal can simulate 0-10V and 4-20 mA; the digital quantity input signal can simulate active and passive. And the program test under various working conditions is met.

3. Is suitable for wide crowds and is necessary for beginners and teachers engaged in the industry for many years.

4. Convenient to use, succinct, even the ordinary electrician who has not received professional training also can accomplish on-the-spot simulation according to the instruction operation of cabinet door.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model.

FIG. 1 is an external view of the present invention;

FIG. 2 is a schematic diagram of the detection of the present invention;

FIG. 3 is a circuit diagram of the power distribution of the present invention;

FIG. 4 is a wiring diagram of the controller of the present invention;

FIG. 5 is a diagram of a digital input acquisition circuit according to the present invention;

FIG. 6 is a circuit diagram of the digital input acquisition circuit for switching active and passive signal acquisition according to the present invention;

FIG. 7 is a digital output acquisition circuit diagram according to the present invention;

FIG. 8 is a line drawing of a test cabinet terminal block of the present invention;

in the figure: 1. a display; 2. a touch screen; 3. a signal generator; 4. a switch; 5. a controller; 6. a computer; 7. a transfer switch; 8. a PLC to be tested; 9. a multimeter.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1 to 8, the present invention provides a technical solution: a control program test cabinet for a heat exchanger unit comprises a display 1, a touch screen 2, a signal generator 3, an exchanger 4, a controller 5, a computer 6, a change-over switch 7 and a universal meter 9, wherein the output end of the computer 6 is connected with the display 1, the touch screen 2 receives set data and outputs the set data to the computer 6, the controller 5 is connected with the exchanger 4 and the computer 6 through RJ45 interfaces to realize data transmission and control, the signal generator 3 outputs current, voltage or resistance signals to a tested PLC8 to realize analog quantity input, the computer 6 is connected with the controller 5 to monitor an analog quantity theoretical value and compare the analog quantity actual value with an analog quantity measured by the universal meter 9, the change-over switch 7 transmits active or passive digital quantity input signals to the tested PLC8, the computer 6 is connected with the controller 5 to monitor a digital quantity theoretical value and compare the digital quantity actual value with a digital quantity measured by the universal meter 9, and an alternating current power supply is respectively connected with the controller 5 and a power supply, The power supply of the signal generator 3 and the power supply of the touch screen are connected and supply power, and the whole unit control cabinet can be debugged in a production workshop by using the scheme. The automatic control engineer of the unit manufacturer can find and remove basic hardware and program problems in a workshop, so that a large amount of time is saved for field debugging, and the debugging cost is reduced.

In this embodiment, T1 of the controller 5 is connected to the controller power supply, T2 is connected to the analog input circuit, T3 is connected to the analog output circuit, T4 is connected to the digital input circuit, and T6 and T7 are connected to the digital output circuit.

In this embodiment, the touch screen 2 is connected to the PLC8 to be tested via a network cable.

In this embodiment, all install the circuit breaker on the circuit of power distribution, and the circuit breaker rated current is 2A, and alternating current power supply still is connected with power indication, reserves jack power, cooling, gate lighting system and 1.1KW motor power.

The working principle and the using process of the utility model are as follows: analog input acquisition is realized with signal generator 3 in this application platform, through operation signal generator 3, outputs required electric current, voltage or resistance signal to being surveyed PLC 8.

The digital input acquisition is realized by using a change-over switch 7, an intermediate relay and an indicator lamp in the platform, firstly, the type of a required digital input signal is determined according to the model of a PLC8 to be tested, the digital input signal is divided into an active type and a passive type, the active-passive change-over switch 7 of the platform is rotated to realize the active-passive switching, then the 'one-zero' change-over switch 7 with the serial number of 1-5 of the platform is rotated to enable the digital input signal to be output to the PLC8 to be tested, and meanwhile, the digital input signal indicator lamp of the platform can be correspondingly indicated, namely when the change-over switch 7 is changed to the 'one-position', a signal lamp is on; turning to the zero clearing position, the signal lights are turned off.

The analog quantity output is the analog quantity output of the tested PLC8, and the theoretical value monitored by the computer 6 in the platform after being connected with the controller 5 is compared with the actual value measured by the universal meter 9, so that the condition whether the analog quantity output is correct or not is finally measured.

The digital quantity output is the switching value output of the PLC8 to be tested, and the theoretical value monitored after the host computer 6 in the platform is connected with the controller 5 is compared with the actual value measured by the universal meter 9, so that the condition whether the digital quantity output is correct or not is finally measured.

The on-site operation condition is simulated by continuously operating the signal magnitude value output by the signal generator 3 and the position of the 'one-setting-zero' change-over switch 7, then whether the program in the PLC8 to be tested has problems can be conveniently and quickly found out according to the final data monitored by the computer 6 host, the touch screen 2 and the universal meter 9 of the platform, meanwhile, the computer 6 host integrated in the platform is provided with corresponding PLC programming software which can be directly changed and installed, time is greatly saved, and through the on-site simulation operation, the use and improvement of the S7-SMART and the S7-1500 PID of the Siemens brand PLC are successfully solved at present, so that the control requirement of the heat exchanger unit can be better met.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims (8)

1. The utility model provides a control program test cabinet for heat exchanger unit which characterized in that: including display (1), touch-sensitive screen (2), signal generator (3), switch (4), controller (5), computer (6), change over switch (7) and universal meter (9), signal generator (3) output current, voltage or resistance signal realize analog input to being surveyed PLC (8), computer (6) are connected monitoring analog theoretical value with controller (5) and are surveyed analog actual value with universal meter (9) and compare, change over switch (7) will be active or passive digital input signal to being surveyed PLC (8), computer (6) are connected monitoring digital theoretical value with controller (5) and are surveyed digital actual value with universal meter (9) and compare.

2. The control program test cabinet for the heat exchanger unit according to claim 1, characterized in that: the alternating current power supply is respectively connected with and supplies power to the controller (5) power supply, the signal generator (3) power supply and the touch screen power supply.

3. The control program test cabinet for the heat exchanger unit according to claim 1, characterized in that: t1 of the controller (5) is connected with a controller power supply, T2 is connected with an analog quantity input circuit, T3 is connected with an analog quantity output circuit, T4 is connected with a digital quantity input circuit, and T6 and T7 are connected with a digital quantity output circuit.

4. The control program test cabinet for the heat exchanger unit according to claim 1, characterized in that: the touch screen (2) is connected with the PLC (8) to be tested through a network cable.

5. The control program test cabinet for the heat exchanger unit according to claim 1, characterized in that: the circuit breakers are installed on the power distribution lines, and the rated current of each circuit breaker is 2A.

6. The control program test cabinet for the heat exchanger unit according to claim 1, characterized in that: the output end of the computer (6) is connected with the display (1).

7. The control program test cabinet for the heat exchanger unit according to claim 1, characterized in that: the touch screen (2) receives the set data and outputs the set data to the computer (6).

8. The control program test cabinet for the heat exchanger unit according to claim 1, characterized in that: the controller (5) is connected with the switch (4) and the computer (6) through an RJ45 interface.

Images