1. CPU abnormality:
When the CPU is abnormally alarmed, check all the devices connected to the internal bus of the CPU unit. The specific method is to replace the units that may have problems in turn, find out the problem units, and deal with them accordingly
2. Memory abnormality:
If the memory is abnormally alarmed, if it is a problem with the program memory, the problem will be reproduced after being programmed from scratch. This situation may be caused by noise disturbance causing a change in the program, otherwise the memory should be replaced.
3. Abnormal input/output unit and abnormal expansion unit:
When this kind of alarm occurs, you should first check the penetration status and cable connection status of the connector of the input/output unit and the expansion unit, and then replace the unit after determining the occurrence of a certain unit.
IV. Non-performance Procedure:
In general, it can be viewed according to the process of performing ——- output according to the input ——- program
(1) Input viewing is identified by the input LED indicator or by the input monitor composed of a writer. When the input LED is not lit, you can start to conclude that it is a fault with the external input system, and then cooperate with the multimeter to check. If the output voltage is abnormal, it can be concluded that the input unit is faulty. When the LED is on but the internal monitor is not visible, it can be considered to be a fault with the input unit, CPU unit, or expansion unit.
(2) Program fulfillment viewing is viewed by a monitor on the writer. When the contact status of the ladder diagram is inconsistent with the result, it is a program error (such as the use of two layers of internal relays, etc.), or the operation part is faulty.
(3) Output view: Identification can be identified by output LED indicator. When the calculation result is correct and the output LED indication is wrong, it can be considered as a fault of the CPU unit and 1/0 interface unit. When the output LED is bright but there is no output, it can be determined that the output unit is faulty, or the external load system is faulty.
In addition, due to the different PLC models, the connection method of 1/0 and LED is different (some are connected to the interface of the 1/0 unit, and some are connected to the 1/0 unit). Therefore, the scale of the problem according to the LED judgment is also different.
5. Failure to perform some procedures:
The viewing method is the same as in the previous item
However, if the input time of the counter, step controller, etc. is too short, there will be no echo problem, then the input time should be checked whether the input time is large enough, and the verification can be carried out according to the maximum echo time of the input unit at the input time + the time of operation and sweep multiplied by 2.
6. If the power supply is powered off for a short time, the program content will also disappear:
(1) In this case, in addition to checking the battery, check as follows
(2) After repeatedly turning on and off the power supply of the PLC itself. In order for the microprocessor to start up correctly, the PLC is equipped with a circuit for the initial reset point and a circuit for saving the program when the power supply is disconnected. When this circuit fails, the program cannot be saved. Therefore, you can check the power supply on and off.
(3) If the battery abnormality alarm persists after the battery is replaced, it can be determined that the abnormal increase in leakage current in the memory or external circuit is caused.
(4) The on/off of the power supply is always synchronized with the machine system, and the noise impact of the machine system can be viewed. Because the disconnection of the power supply is often caused by the same time as the machine system, most of them are caused by the strong noise of the motor or winding.
7. PROM does not work:
Check to see if the PROM penetration is good, and then determine if the chip needs to be replaced
8. After the power supply is put in or reset from the beginning, the action stops:
This problem can be thought to be caused by noise disturbance or poor contact within the PLC. The cause of noise is generally caused by the reduction of small capacitor capacity on the circuit board or the poor function of the components. Also look at the penetration of cables and adapters.
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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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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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There are two simpler ways to communicate:
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2. Through network port communication, CP1H installs CP1W-CIF41 network port option board ...
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Omron Liang brings the latest seventh-generation FORPHEUS to the stage of the Expo
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What are the characteristics of Omron 3G3JZ series inverter?
1. Standard configuration with RS485 interface, Modbus bus communication function;
2. At 3Hz, it can provide more than 150% torque output and start quickly;
3. The carrier frequency of 2-15KHz is adjustable, which can realize silent drive;
4. Equipped with simple energy-saving function;
5. Controlled ...
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FAQs on Omron PLC
1.How to install the USB driver of CP1H?
The computer is connected to CP1H (powered on) through a USB cable, and the PC will automatically prompt to find the new hardware and prompt to install the driver.
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How to use Omron switches
1. When the Omron switch power socket is embrittle or damaged, it must be repaired and replaced immediately.
2. When going out, falling asleep, or suddenly losing power, be sure to cut off the power immediately. Household appliances, in particular, must be more careful.
3. Omron switches and power sockets should be set as much as possible.
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(1) Failure of peripheral circuit components
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The input circuit is a PLC receiving switching quantity ...
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Representative models: G5Q, G2RL, G5NB, G4A and other power relays
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(2) High transmission quality, fast speed and stable bandwidth
Can be very ...
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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.
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The first
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3. Down...
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What are some common troubleshooting methods for Omron?
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