(1) Failure of peripheral circuit components
This kind of failure is relatively common in PLC maintenance and usually occurs frequently after a certain period of work. If there is a component damage fault in the PLC control loop, the PLC control system will stop working immediately and automatically.
The input circuit is the port for the PLC to receive input signals such as switching and analog, and the quality, wiring mode and reliability of its components are also important factors affecting the reliability of the control system.
For switching output, there are three forms of PLC output: relay output, thyristor output, and transistor output. The specific choice of output form depends on the load requirements, and improper selection will reduce the reliability of the system.
When it is low, the system will not work properly.
In addition, the load capacity of the PLC output is limited. If the specified maximum limit is exceeded, an external relay or contactor must be connected for proper operation.
The quality of actuators such as external relays, contactors, and solenoid valves is an important factor affecting the reliability of the system. Common faults include short circuits in the coils, mechanical failures that result in immobile contacts or poor contact.
(2) Poor terminal wiring contact
This kind of failure occurs after the PLC has been working for a certain period of time, with the increase of the frequency of equipment action. Vibration in use and increased mechanical life due to wiring defects in the control cabinet,
Terminals or component terminals tend to loosen, resulting in poor contact.
The way to troubleshoot this type of fault is to diagnose and repair the fault with a multimeter with the help of a control system schematic diagram or PLC logic ladder diagram.
For the connection of some important peripheral terminals, in order to ensure the reliable connection, the method of cold-pressed parts or cold-pressed pins is generally used.
(3) Functional failure caused by Omron PLC interference
The various types of programmable controllers used in automation systems are control devices that are specifically designed for industrial production environments. In the design and manufacturing process, multi-level anti-interference and component selection measures are adopted, which has strong ability to adapt to harsh industrial environments, stable operation and high reliability. As a result, it can be used directly in industrial settings without any special measures.
The interference of PLC can be divided into internal interference and external interference. In the actual production environment, external interference is random and has nothing to do with the system structure, and the interference source cannot be eliminated, but can only be limited according to the specific situation. Internal interference is related to the structure of the system. It is mainly caused by the main AC circuit and the analog input signal in the system, and the internal interference can be suppressed to the greatest extent by carefully designing the system circuit or filtering the system software.
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【Omron industry case】Predictive maintenance of smoke machine in automobile welding workshop
Process introduction
Automobile welding is the second of the four major processes in vehicle production, which mainly assembles stamped body components into a complete body. In the welding process, spot welding and arc welding of robots are the mainstay, and there will be a station for visual inspection of the welding status in the middle.
Make...
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A detailed description of the environment in which Omron sensors are used
1. Ambient temperature
The specification of the sensor will rule the ambient temperature range of the normal operation of the sensor, such as 40-85 degrees, which varies depending on the product model. It is advocated not to exceed the temperature range specified in the specification book, beyond the normal operating temperature range of the sensor, ...
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Recommended selection of Omron's commonly used products
Omron's recommended product models today:
K8DS is a triple opposite missing sequential appliance
The inverse lacks sequential electrical appliances
Three-phase voltage + inverted phase lack sequential electrical appliances
Three-phase unbalanced + inverted lack of sequential electrical appliances
Three-phase undervoltage + inverted inverted missing sequential electric
Three-phase voltage + three-phase ...
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Omron micro switch and model introduction
The micro switch is a contact mechanism with a small contact spacing and a quick action mechanism, with the specified stroke and the specified force for the switch action, covered with a shell, and a switch with a driving rod outside, because the contact spacing of the switch is relatively small, so it is called a micro switch, also known as a sensitive switch.
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Omron PLC cannot connect to the computer
Method: If the computer has a 9-pin serial port, then you can make a wire. The wiring is as follows: computer PLC2 --------- 23 --------- 3 5 --------- 9 If you don't have it, you need a USB to serial port cable (you need to install a driver), and you can connect to PLC through the above wire ...
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The correct use and precautions of Omron electronic blood pressure monitor
How to use Omron blood pressure monitor
1. Rest for 10-15 minutes before using an Omron sphygmomanometer to measure blood pressure to eliminate fatigue and excitement.
You must rest for 30 minutes after exercising. The indoor ambient temperature should be kept at about 20°C. Take 3-4 deep breaths before measuring your blood pressure. Lying ...
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Omron's digital predictive maintenance prototype enables predictive maintenance without relying on skilled workers
With the development of society, manufacturing sites are facing new issues, such as the lack of skilled maintenance personnel, the aging of existing equipment, and the increase in equipment accident losses due to high value-added products. To this end, Omron relies on mature automation technology to electronically transform maintenance skills ...
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How Omron PLC works and what are the advantages
Omron PLC is a compact PLC with complete functions that provides highly additional machine control for industry-leading conveying and distribution control. It also has the ability to upgrade through a variety of advanced built-in boards, large program capacities and memory units for efficient software development in the Windows environment.
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Causes and solutions for E1 fault codes in Omron electronic sphygmomanometers
The E1 fault code usually appears on the display of the blood pressure monitor and indicates that the inflation pressure is too high or too low. This failure can lead to inaccurate measurement results or even inability to complete the measurement.
Solution(s):
1. Check whether the cuff is worn correctly and whether it is properly tightened.
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Common troubleshooting methods for Omron relays
First, the contact point is loosened and cracked
The contact point is the electrical contact part of the Omron relay to convert the load, and the contact point of some products is matched with each other by riveting pressure, and the key disadvantage is that the contact point is loose, the contact point is cracked or the error of the standard part is too large. This will jeopardize the relay ...
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Selection rules for Omron relays
1. Coil voltage: also known as input voltage, used to control the contact on/off, with AC24V, DC24V, AC220V and other specifications
2. Contact capacity: the voltage and current of the load
3. Contact structure: 2C (double-pole double-throw), 4C (four-pole double-throw), 1A, 1B, etc
4. Load type ...
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Omron Relays – How relays work
1. Rated working voltage.
The voltage required by the coil for the relay to operate normally.
Depending on the model of the relay, it can be either AC voltage or DC voltage.
2. DC resistance.
The DC resistance of the coil in the relay can be used with a multimeter ...
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Introduction to the classification of Omron relay switch contacts
1.A contacts
A contact is a contact in which the two contact terminals are separated (OFF) when the switch is not operated, and closed (ON) when the switch is operated. If you want to start the load by operating the switch, you can use the A contact. A circuit is a circuit that uses a contact without operating the switch (pressing ...
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Common causes and solutions of PLC failures in Omron operation
Fault phenomenon: The analog module CJ1W-DA041 outputs 4-20mA current for 4 channels, of which channels 2 and 3 are normal, and channels 1 and 4 have no current output.
Analyzing the circuit, the 4 current outputs use 4 manifold LT1490 for D/A conversion, and first measure the manifold LT on 1 and 4 channels.
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Omron PLC formatting method
1. Click [Controller] - [Mode] - [Programming Mode].
2. Click [Yes] in the pop-up window, and at this time, the PLC is in programming mode.
3. Click [Controller] - [Clear All Memory].
4. Click [OK], and the PLC memory is successfully ...
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Instructions for the use of Omron relays
One. Omron relays should be installed in a well-ventilated environment with room temperature and humidity, and there are no flammable gases, dusts and other dangerous factors in the installation environment to ensure that Omron relays can be used normally after being put into operation.
Two. The selection of Omron relays should be in line with the actual needs.
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What are some common failures of Omron?
Common troubleshooting methods for Omron are as follows:
(1) Failure of peripheral circuit components
This kind of failure is more common in PLC maintenance, and it is generally a frequent occurrence in failures after a certain period of work. In the PLC control loop, if there is a component damage fault, the PLC control system ...
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Application of Omron Robotics in Medical Cartoner Loading System
Process introduction
In 2020, the new crown epidemic ravaged the world, and as of February 2022, the number of confirmed cases and deaths exceeded 400 million.
In the face of the continued ravages of the new coronavirus, the new crown epidemic ...
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Omron Heater Status Monitor K7TM was officially released
In June 2022, Omron Automation (China) Co., Ltd.'s new product [Heater Status Monitor K7TM] was officially released. Without going to the site, through real-time monitoring of heater status, the aging trend of heater equipment that cannot be captured manually is clearly displayed, and predictive maintenance is realized!
In high temperatures ...
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Precautions for the use of Omron relays
1. Installation orientation
Proper installation orientation is critical to maintaining the best characteristics of the relay.
· The installation orientation of the impact resistance idealization is to make the contact point and the moving member (part of the armature) in the fitness movement orientation and the vibration or impact orientation upright, very normally open contact in the electric ...
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