There are two fundamental circuits for communicating with external signals: analog and digital:
1. 4-20mA current signal loop (imitation); 1 - 5V/0 - 5V voltage signal loop (imitation).
2. Switch signal circuit, inverter start and stop instructions, forward rotation instructions, etc. (digital).
The external control command signal is introduced into the inverter through the above-mentioned fundamental circuit, and the agitation potential is also generated in its circuit by the agitation source, so that the control cable is the medium to invade the inverter.
PR (Procedure): The smallest unit of an instruction, which can be composed of one or more programs. The program is triggered by DI:CTRG, and POS0 - POS5 is used to specify the program number that is triggered. The execution of the program that has been triggered now is over, the next program can be actively triggered, the program number can be set, and the delay time between programs can be fixed. In PR mode, it provides the function of an electronic cam, which can be turned on by the PR program, and the convex can be detached to return to the specified PR program.
Because Delta inverters have built-in 32-bit or 16-bit microprocessors, various arithmetic logic operations and intelligent control functions, the output frequency accuracy is 0.1 points to 0.01 points, and they are equipped with perfect detection and protection links, so Delta inverters are widely used in automation systems. Such as: winding, stretching, metering, and guide wire for chemical fiber occupations, flat glass annealing furnaces for glass occupations, mixing, edging machines, bottle making machines for glass kilns, active feeding and batching systems for electric arc furnaces, and intelligent control of elevators.
In actual use, we also need to pay extra attention to the protection and precautions of the inverter:
1. The control cabinet equipped with the inverter should be kept away from the large-capacity transformer and motor as far as possible. The control cable route should also avoid these devices with large leakage flux.
2. Do not approach the circuit breaker and contactor that are prone to arcing when the weak voltage and current control cable is weak.
3. The control cable advocates the use of 1.25mm2 or 2mm2 shielded stranded insulated cable.
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The specific operation method of Delta inverter
(1) When the speed of the motor is controlled by the Delta inverter, the noise and temperature rise of the motor are higher than that of the frequency of the motor. When the motor is working at low speed, due to the low speed of the motor blades, the temperature rise of the motor becomes high.
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Delta UPS power supply RT5K extension configuration method for 2 hours
Engined DC: 1K=36V, 2K=72V, 3K=96V, 5K, 6K, 10K=192V
UPS power supply accounting formula: 1KVA (volt-ampere) =700W (watt) =1000VA (volt)
UPS power supply x extended time + starting DC = how big the battery is
Start DC + V number of battery = how much power is distributed ...
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Delta UPS uninterruptible power supply R-2K series
With the increasing demand for system switching power supply by computer technology, Delta UPS uninterruptible power supply R-2K series products have been paid more and more attention, and gradually developed into a kind of electrical engineering with the effects of voltage stabilizer tube, frequency stabilization, filtration, anti-electromagnetic and frequency emission influence, anti-operation voltage swimming, etc.
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How Delta's touch screen works
Delta's touch screen consists of a contact detection component and a touch screen controller.
The contact detection component is installed in front of the display screen to detect the user's contact orientation and is sent back to the touch screen controller; And Delta's touch screen controller's ...
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Delta's inverter model selection
1. VFD-B series
This series has a variety of communication voltage standard model options, in addition to providing a variety of I/O signal functions, and can supply the appropriate current and voltage vector value according to the external load torque, to meet the needs of customers with high quality and low price.
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Delta's power supply series application considerations
(1) Considering that the power supply is inconsistent at the time of power-on, the load is short-circuited, and the rational load may present a reverse voltage, the output end of each power supply connected in series should be set up with two anti-parallel tubes, and the forward additional current of the two * tubes should not be less than the additional output current of the power supply, and the reverse breakdown voltage should not be less than ...
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VFD center power electronics and control mode
1) Power electronic equipment power electronic equipment is in the circuit to play the effect of on-off and complete a variety of converter equipment, VFD is the installation of this converter, so it is with the development of the inverter equipment and unfold, the quality of the inverter equipment depends on its on-off ability, accept the on-off current and amount...
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Delta's Ultron NT series UPS escorts flight safety at international airports
The rapid development of the national economy has opened up a broad shopping mall space for the growth of the civil aviation industry. In order to meet the surge in the number of flights, an international airport in Northwest China has invested in the third phase of the expansion project, and has been listed as the "number one project" for civil aviation development and the "benchmark demonstration project" for national civil aviation.
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DC motor speed regulation method - Delta
There are three speed regulation methods for DC motors: armature loop string resistance, armature voltage regulation and speed regulation, and weak magnetic field speed regulation. The three speed regulation methods can achieve stepless speed regulation.
1. Armature loop string resistance
The applied resistor is connected to the armature circuit.
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Troubleshooting of small electromagnetic relay cores - Delta
The main problems of the iron core of the small electromagnetic relay are that the armature cannot be sucked after being electrified:
This may be due to broken coils, foreign matter between the moving and static cores, and low power supply voltage. It should be patched on a case-by-case basis.
When energized, the armature is noisy:
This may be because of the ...
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Set the parameters when reading and uploading the Delta PLC program
Open Delta's programming software, and use WPLSOFT to do the demo here;
First, click on the settings and then click on the communication settings in the settings, select the communication mode, communication port, communication baud rate, communication station number, etc.
After the setting is finished, click OK to automatically close the pop-up window.
In the dish ...
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Precautions for long-term idle use of Delta inverter
If the inverter is to run the equipment again after being shelved for more than half a year, the probability of damage may be greatly increased due to many factors such as the placement environment, the service life of the inverter, and the load rate, and the failure usually presents the following problems:
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Solution to the problem of inverter undervoltage - Delta
In order to protect the inverter, when the bus voltage is too low, the inverter will report the undervoltage problem and close the pulse output of the inverter. This is an important and necessary way to protect the inverter equipment from damage. This issue also cannot be blocked.
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Inverter environmental installation requirements and methods - Delta inverter
1. The environmental requirements of the inverter
Ambient temperature - 10 °C - 40 °C;
Ambient humidity: The relative humidity does not exceed 90% (no condensation);
Other occasions that require no direct sunlight, no corrosive gas and flammable gas, and less dust, with an altitude of less than 1000m.
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The inverter has a function – a Delta inverter
1. Soft start is energy-saving
The hard start of the motor will cause a serious impact on the power grid, and it will also require too high the capacity of the power grid, and the large current generated when the motor is started and the sensation will cause great damage to the baffle and valve, and the service life of the equipment and pipeline will be extremely unlucky. And the use of inverter energy-saving devices ...
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Delta's soft starter component role
The soft starter is a device used to control the start and stop of the motor, which is composed of a number of components, including the soft starter controller, the soft starter conditioner, the soft starter power supply, the soft starter input and output module, the soft starter interface module, etc.
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Precautions for Delta's DPA pressure sensor
1. When the device is installed, leave the place with high voltage and strong high-frequency noise to prevent disturbance. Prevent use in places where the following conditions occur:
(a) Excessive dust and corrosive gases; (b) high humidity and very high radiation; （c） ...
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Inverter Fault Repair Test Method - Delta
Static quizzes
1. Test the rectifier circuit
Find the P and N ends of the DC power supply inside the inverter, adjust the multimeter to the resistance X10 gear, connect the red watch rod to P, and separate the black watch rod to R, S, T. Instead, connect the black watch rod to the P...
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Introduction and features of Delta PLC
Delta's programmable controllers, also known as Delta programmables, delta programmable controllers, delta programmable controllers, etc., are electronic devices specially designed by Delta for the industrial automation category to complete digital operations. Delta's PLC uses programmable memory to store execution logic inside it.
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Delta's M300 series inverters are used in primary and auxiliary frequency applications
I. Introduction
Some devices will have many transmission organizations, and it is impossible for the transmission organization to achieve 100% speed synchronization, so it is necessary to introduce ------ The final motor speed of the pendulum roller is *** := main speed + (+-auxiliary correction change)
Use the site ...
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