(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 will immediately and automatically stop working. The input circuit is the port of the PLC to accept the input signals such as switching quantity and analog quantity, and the quality of its components, wiring mode and whether it is reliable are also important factors affecting the reliability of the control system.
For the switching output, the output of the PLC has three forms: relay output, thyristor output and transistor output, and the specific choice of which form of output should be decided according to the load requirements.
In addition, the output terminals of the PLC have a limited load capacity. If the specified maximum limit is exceeded. An external relay or contactor must be connected. to work properly. 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 coil, mechanical failures that cause immobility of the contacts or poor contact.
(2) Poor terminal wiring contact
This kind of fault occurs after the PLC has been working for a certain period of time with the increase in the frequency of equipment action. Due to the defects in the wiring of the control cabinet or the intensification of vibration in use and the mechanical life, the terminal posts of the terminals or components are easy to loosen and cause poor contact.
The method of troubleshooting this kind of fault is to use a multimeter, with the help of the control system schematic diagram or PLC logic ladder diagram for fault diagnosis and maintenance. For the wiring of some important peripheral terminals, in order to ensure reliable connection, the method of soldering cold-pressed sheets or cold-pressed pins is generally used.
(3) Functional failure caused by interference of Omron PLC
The various types of PLCs used in automation systems are control devices specially designed for industrial production environments. In the design and manufacturing process, multi-level anti-interference and selected component measures are adopted, so it has a strong ability to adapt to harsh industrial environments, operational stability and high reliability. Therefore, it can generally be used directly in an industrial environment without any special measures.
The interference experienced by the PLC can be divided into internal interference and external interference. In the actual production environment, external interference is random, independent of the system structure, and the source of interference cannot be eliminated and can only be limited on a case-by-case basis.
Internal interference is related to the structure of the system. It is mainly caused by the AC main circuit and analog input signal in the system, and the internal interference can be suppressed to the greatest extent through careful design of system circuits or system software filtering.
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What are the advantages of Omron MOS FET relays?
1. The relay is small and still weldable.
The relays in SSOP/USOP packages feature directly exposed terminals for excellent visibility and easy installation.
2. Ultra-small and lightweight: In addition to SSOP and USOP, ultra-small packages contribute to the miniaturization of devices.
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What's the deal with Omron PLC without output voltage?
1. The indicator light at the output of the PLC is on, indicating that the DO point of the PLC has been closed; 、
2. The DO point of PLC is equivalent to a dry contact switch, imagine that an on/off switch on a line is closed, if you measure the voltage on both sides of this switch, there will be no voltage, thinking that the switch itself ...
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【Omron industry case】Application of high-end pouch battery welding machine
Process introduction
In the middle process of the secondary battery, the battery welding machine first needs to quickly heat press the battery cells after winding/lamination to achieve cell compaction, and then ultrasonic welding of the positive and negative tabs of the battery cells.
problem
1. Pressure fluctuates greatly, causing ...
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What are the main items of Omron PLC overhaul?
1. Overhaul the power supply. It is possible to detect whether the voltage variation range is within the permissible ± 10% at the power terminal.
2. Working environment. Focus on checking whether the temperature, humidity, vibration, dust, interference, etc. meet the standard working environment.
3. Power supply for input and output. Available in the corresponding ...
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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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Introduction to the function of Omron PLC DIP switch
1. Address setting: The DIP switch can set the local address of the PLC for communication with other devices.
2. Communication parameter setting: The DIP switch can set the communication parameters of the PLC, including communication rate, data bit, check bit and stop bit, etc.
3. Input/Output ...
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Fault maintenance methods commonly encountered in the operation of Omron PLC
(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 a PLC receiving switching quantity ...
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What should Omron PLC pay attention to when selecting a model
Omron PLC is a compact PLC with perfect functions, which can provide high value-added machine control for industry-leading conveying and decentralized control; It also has the ability to upgrade through a variety of advanced built-in boards, large program capacity and memory units for efficient software development in the Windows environment ...
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Where did the cable with screws at the bottom of the Omron micro switch come from?
Different models of Omron micro switches may have different wiring methods. Generally speaking, the wire with screws at the bottom of the Omron micro switch is usually the contact used to connect the switch, which needs to be connected to an external circuit.
The wiring steps are as follows:
1. Confirm the bottom of the switch ...
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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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The reason why the ER light is always on after the Omron PLC is powered on
1. Fault phenomenon: The ERR light is always on when the PLC is powered on, and the PLC is not working.
2. Cause of failure:
(1) Poor use environment leads to oxidation and corrosion of internal MPU, memory, and even substrates.
(2) Due to electromagnetic interference, noise interference, static electricity, etc., the internal MPU ...
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Omron announces the opening of its California Robotics Headquarters
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How can Omron micro switches meet the market demand for smart locks?
Nowadays, the smart lock market has a wide variety of names, and it can't help but give people a sense of "random flowers gradually charming eyes". So, how to choose a cost-effective smart lock? In fact, in smart locks, micro switches can be said to occupy an important position. Microswitches ...
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Analysis of the location and cause of Omron PLC failure
1. External equipment failure. Such faults come from external devices such as various sensors, switches, actuators, and loads. The failure of this part of the equipment will directly affect the control function of the system. This type of failure is usually caused by the quality and longevity of the equipment itself.
2. System failure ...
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Omron's medical predictive electronic thermometer helps efficient epidemic prevention and control
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What are the common faults of Omron PLC?
1. CPU abnormality: When the CPU abnormality alarms, check the devices connected to the internal bus of the CPU unit. The specific method is to replace the units that may cause failures in turn, find out the faulty units, and deal with them accordingly.
2. Memory abnormality: When the memory is abnormal alarm, if it is a program ...
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Maintenance method of Omron PLC
1. Maintenance procedures, regular testing and adjustment of equipment
(1) Check the connection of the terminal blocks in the PLC cabinet every six months or quarters, and reconnect the loose places in time if they are found;
(2) Re-measure the working voltage of the power supply to the main engine in the cabinet every month ...
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The solution to the Omron blood pressure monitor E3 failure
The E3 fault code usually appears on the display of the blood pressure monitor and indicates that the cuff is too tight or too loose. This failure can lead to inaccurate measurement results or even inability to complete the measurement.
Solution(s):
1. Adjust the tightness of the cuff to make sure the cuff is neither too tight nor too loose.
2. Check the sleeve ...
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Possible malfunction of Omron switch contacts
1. The internal components of Omron switch are not in good contact.
2. Omron switch malfunction.
3. The Omron switch is fused.
4. The insulation performance of Omron switch becomes weaker.
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Omron PLC--CPM1A-V1 series product model
1. CPM1A-10CDR-A-V1 10-point CPU unit AC100-220V, 6 points in, 4 points relay output
(1A is the model code; 10 means that the total number of input and output points is 10 points, specifically 6 points of input and 4 points of output; C means CPU unit; D stands for mixed type, that is, there is a loss ...
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