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.
Second, the provisions of regular cleaning of equipment
(1) Clean the PLC every six months or quarters, cut off the power supply to the PLC, remove the power supply rack, CPU motherboard and input/output board in turn, purge and clean and then install it in situ in turn, restore all connections and send power to the PLC host and start the PLC host. Carefully clean the PLC box;
(2) Replace the filter under the power rack every three months.
3. Preparation and maintenance procedures before maintenance
(1) Prepare tools before overhaul;
(2) In order to ensure that the function of the component does not fail and the template is not damaged, it is necessary to use protective devices and carefully make anti-static preparations;
(3) Contact the dispatcher and operator before the overhaul, and hang the maintenance card at the place where the maintenance card is hung.
Fourth, the equipment disassembly sequence and method
(1) Shutdown for maintenance, more than two people must supervise the operation;
(2) Change the mode selector switch on the front panel of the CPU from "Run" to "Stop" position;
(3) Turn off the main power supply of PLC power supply, and then turn off other power supplies to the mold saka;
(4) Remove the power cord connected to the power rack after clearing the wire number and connection position, and then remove the screws connected to the power rack and the cabinet, and the power rack can be removed;
(5) The CPU motherboard and I/0 board can be removed after rotating the screws under the template;
(6) Installation is carried out in reverse order.
Fifth, the maintenance process and technical requirements
(1) When measuring voltage, it is necessary to use a digital voltmeter or a universal meter with an accuracy of 1%.
(2) The power supply rack and CPU motherboard can only be removed when the main power supply is cut off;
(3) Before the RAM module is removed from the CPU or inserted into the CPU, the power supply of the PC should be disconnected, so as to ensure that the data is not messed up;
(4) Before removing the RAM module, check whether the module battery is working normally, if the battery failure light is on, remove the module PAM content will be lost;
(5) The main power supply should also be turned off before the input/output board is removed, but if the I/0 board is required for production, it can also be removed when the programmable controller is running, but the QVZ (timeout) light on the CPU board is on;
(6) When inserting the template, be extra careful, handle it gently, and keep away from items that generate static electricity;
(7) The replacement element shall not be operated with electricity;
(8) After overhaul, the formwork installation must be placed in place.
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What are the common faults of Omron relays?
Fault 1:
Do not exceed the rated voltage of the load current during the use of the OMRON relay, because when the applied rated voltage is too large, it may cause a local short circuit between the cores of the OMRON relay coil and poor operation of the AC operation relay. And there are ...
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Analysis of common faults and causes of Omron relays
First, the condition that the relay is not turned on
1. If the load current exceeds the rated conversion current of the relay, the relay will have a short circuit fault, and the relay with a large rated voltage should be replaced
2. At the working temperature where the relay is located, the amount of current borne by the relay is ...
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Key Features of Omron PLC:
(1) Flexible structure
Regardless of the environmental limitations, the network can be built when there is electricity, and the number of access ports can be flexibly expanded, so that the resource utilization rate is high, and it is comparable to WLAN in terms of mobility.
(2) High transmission quality, fast speed and stable bandwidth
Can be very ...
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Omron achieves its goal of increasing its share of the local healthcare market
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Omron | A high level of safety for people, equipment and products
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At manufacturing sites where social distancing is required, we can increase productivity by reducing the number of workers
Due to the pandemic, social distancing was also required on manufacturing sites, and manufacturing with fewer workers had to be achieved quickly. Prior to this, the automatic ...
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Omron set off a digital low-carbon boom at the expo
From November 5th to 10th, the 5th China International Import Expo was held in Shanghai, where multinational companies from all over the world gathered to participate in the annual international economic and trade event.
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Omron PLC troubleshooting
1. Power check:
The first thing to analyze is the reliability of the power supply and ground of the Omron PLC. Visually inspect power and ground cables for damaged, corroded, or other suspicious links.
Power supplies can also be electrically tested. If there is AC power in the PLC processor, test ...
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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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Key points of maintenance of Omron relays
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Two. In the process of Omron relay maintenance, it is necessary to check whether the contacts of the Omron relay are ...
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What are the advantages of Omron 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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4. Equipped with simple energy-saving function;
5. Controlled ...
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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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Process introduction
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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.
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Maintenance precautions for Omron relays
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Nine main characteristics of Omron relays
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Omron relay has developed and manufactured a very small standard, leading the relay industry at home and abroad, and occupying a dominant position in the market.
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Causes and solutions for E2 fault codes on Omron electronic sphygmomanometers
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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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What are the selection factors of Omron relays - intermediate relays?
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