The serial port server mainly includes: a power circuit module, an ARM9 processor, a network port circuit module, and a serial port circuit module. The ARM9 processor includes the following interfaces: at least one network port circuit interface and at least one serial port circuit interface. The power circuit module is It is configured to receive power signals to make the ARM9 processor work normally. The external network port of the serial port server can support RJ45 interface form and USB interface form, and can upload data through external WIFI and 3G modules; the serial port of the connecting device It can support the connection of serial port devices in the form of DB9 and Phoenix terminal interfaces. Since the interface forms of different serial port devices in different industrial sites are different, the scope of application of such a serial port server with multiple interfaces will be wider.
Q: Serial server heartbeat format
The serial port server heartbeat packet is in ASCII format and can be displayed in hexadecimal. It does not support setting carriage return and line feed. Please refer to the manual for specific setting methods.
Question: The serial port server connects to the RS485 port of the serial port server through IP. What should I do if the connection fails after reset?
Answer: When the module is powered off (or reset), press the Reload button, then power on, keep the Reload button pressed and release it after 5 seconds to restore the hardware to factory settings.
After the module is restored to factory settings, connect the serial port server to the router with a network cable, and connect the computer to the router. Then use the M4 setup software to search for the serial port server. During the process, be sure to turn off the computer firewall and anti-virus software, and disable redundant network cards.
Question: What should I do if the serial port server cannot receive data when it connects to the card reader through the RS485 port?
Answer: First, use the serial server RS485 to connect AA and BB, then use modbus savle and modbus poll software to simulate the serial device and host computer, turn off the computer firewall and anti-virus software, disable redundant network cards, and then connect the serial device after debugging;
Secondly, if the COM port cannot be recognized through the serial port to USB cable to the computer, you can download the driver to fix it;
Finally, if the modbus savle software cannot recognize it, you can choose the com3 interface to connect. Use the driver wizard to help the serial port work normally.
Question: The serial port server connects multiple devices, connects to the network switch through the serial port, and then connects two computers to the switch. Both computers use the configuration software to access the serial port server to view device data. Does the serial port server supports simultaneous access by computers?
Answer: A conventional serial port server can support two sockets when used as a TCP client, such as USR-N520. When N520 is used as a TCP Server, it can accept up to 8 Clients.
The 21st century is the Internet age, and the popularization of the Internet and the rise of the Internet of Things have become an inevitable trend. The design of this article focuses on converting ARM’s embedded system into a serial port server for Ethernet data transmission, and explores the operational procedures for the adjustable and controllable issues related to the Internet of Things composed of software and hardware devices and their integration into the Internet. This experimental experiment is as follows: the serial port server transmits data stably and accurately, has low power consumption and cost, has high network utilization and is widely used.