The latest network access control problems and solutions

At present, the latest technology of network access control is the use of LAN to build TCP/IP protocol communication mode, which solves many shortcomings of traditional RS485 communication. The common problems and treatment methods of such network access control systems are as follows:

First: After the installation of the access control system, the normal communication cannot be performed with the management software test.

1. Check whether the built-in RJ45 interface indicator on the access controller is on. If the indicator is off, the line is not connected to the LAN through the switch. The focus can be on troubleshooting a line or switch interface failure.

2. The built-in RJ45 interface indicator on the access controller is on, but it is not flashing, indicating that it has been connected to the LAN switch. However, no data is exchanged due to communication. The possible reason is that some of the twisted-pair lines are faulty and need to be independent. Communication test.

3. The indicator light keeps blinking, but the software tests the communication fault because the IP address in the LAN is in conflict. The default IP address of the access controller is 192.168.1.5. The IP address in the LAN of the same gateway is already occupied. The solution is Need to leave the LAN, use the computer to connect the access controller and change the vacant IP address, and then connect to the LAN for IP address scanning.

4. The communication is not normal and there is a situation where the connection is not available. In such a situation, the length of the line may exceed a certain range or there may be interference problems.

Second: Access to the card reader cannot be opened normally. 1. The connection between the card reader and the controller is incorrect. 2. The line is seriously interfered. The card reader data cannot be transmitted to the controller. 3. The proximity card is invalid. The access controller has set a rest day 5, the access controller has performed an initialization operation or other causes the controller to perform an initialization command. 6, the power output to the access control card reader is not enough, so that the card reader cannot correctly transmit the valid card number to Controller