Intelligent Nvr,Network Video Recorder For Auto Repair Shop,Remote Inspection Nvr Device For Drugstore,Nvr Streamlined Inspections For Drugstore OP Retail (Suzhou) Technology Co., Ltd , https://www.opretailtech.com
**Q: Some users' fingerprint access control often fails to pass the verification. How can this problem be solved?**
A: If some employees are having trouble with their fingerprint access control, it could be due to several reasons. For example, the fingerprints on certain fingers may be flattened or have too many creases that change over time. In addition, severe skin peeling or dryness can also affect the recognition process.
If a user's fingerprint isn't being recognized, they can try deleting the existing fingerprint and re-registering it. It’s also recommended to use a different finger for registration. When registering, make sure to choose a fingerprint with fewer wrinkles, no skin flaking, and clear patterns. Try placing the finger on the sensor with a larger area and perform a comparison test after registration. Registering multiple backup fingers is also a good idea.
Moreover, most access control systems support a 1:1 verification method and a password option. Employees who consistently face issues can be set to use these alternative methods for access control.
---
**Q: When the access control machine cannot communicate, what are the reasons?**
A: There are several possible causes when an access control machine fails to communicate. First, the communication port settings might be incorrect—make sure you're using the correct COM port. Second, the baud rate between the computer and the device may not match. Third, the access controller might not be properly powered or connected to the computer. Fourth, the device might be connected but not turned on. Fifth, the terminal number might be entered incorrectly. Sixth, there could be a problem with the data cable or converter. Lastly, the computer’s COM port itself might be damaged.
---
**Q: After the access controller is powered on, the liquid crystal display is incomplete. Sometimes it only shows half, and sometimes the screen is blank. How can I solve this problem?**
A: This issue might be caused by a faulty motherboard or internal LCD problems. If the display is inconsistent or partially visible, it’s likely related to the screen or its connection. In such cases, it's best to contact the supplier or service provider for further assistance. Do not attempt to repair it yourself unless you are qualified.
---
**Q: How to clear the administrator of the access control?**
A: To clear the administrator from the access control system, first, connect the access control machine to the computer via communication. Once the connection is successful, navigate to the "Access Control Management" tab. Look for the "Clear Administrator" button and click it. After the operation is complete, disconnect the connection and enter the access control menu mode. The administrator should now be removed.
---
**Q: What is the reason why the chiming of the flute sounds when the access control communication is connected?**
A: If you hear a chime or unusual sound during communication, it could be due to a mismatch in baud rates if using RS-232. For RS-485 communication, the issue might be due to reversed wires or shorted cables. Always check the wiring connections and ensure the baud rate settings on both the computer and the access control unit are consistent.
---
**Q: After the access control machine is turned on, it repeatedly shows 'Please press (leave) finger'. What is the problem? How to solve?**
A: This issue can occur for a few reasons. One common cause is a dirty or scratched sensor surface, which may trick the system into thinking a finger is still pressed. Clean the sensor with a piece of adhesive tape to remove any debris. Another possibility is a loose or faulty connection of the fingerprint sensor. If that's the case, the hardware might need to be replaced. A broken motherboard chip could also cause this error. If the second or third causes are suspected, it's best to contact the manufacturer for warranty or repair services.
---
**Q: During the operation of the access control system, there is no problem in downloading the fingerprint and password data. However, when reading the access control record, it prompts a failure or an intermediate error. How can I solve this problem?**
A: This issue is often related to the communication setup. Check the data cable and the converter for any faults. Also, verify that the COM port on your computer is functioning correctly. If the problem persists, try reducing the baud rate of both the access control machine and the computer. Set it to 19200 or 9600 and attempt to read the records again. This can help stabilize the communication and prevent errors.