HTTP Server in the ADAM-5510 Ethernet Controller Series
Since the ADAM-5510 PC-based Controller Series are now equipped with Ethernet, Advantech introduces the HTTP Server function which enables web monitoring & control. In order to better understand this function, we have illustrated the system process in the diagram below. This diagram shows the software architecture of HTTP Server function. The HTTP Server is built in the ADAM-5510/TCP (or ADAM-5510E/TCP) Ethernet Controller. Whenever users open the IE Browser to acquire data from the ADAM-5510/TCP Controller through the Internet or Intranet, it will call on the existing web pages to provide a monitoring and control portal. All of the commands from the web page must be linked via a CGI program to the C control program which handles the read/write functions in the ADAM-5000 I/O modules...read more.

Auto-Calibration of Advantech's CompactPCI® and DAQ Cards
Since most passive components such as resistors, capacitors and indicators change characteristics over time; calibration is necessary to ensure accuracy. Traditionally this has been accomplished with the help of variable resistors (VR). To perform a calibration, use a 4.5-digit digital multi-meter and a voltage calibrator, or a stable, noise-free DC voltage source. Regular and accurate calibration procedures ensure maximum accuracy...read more.


What is Null Modem?
Customers will ask what it means when they hear the term “null modem” in conjunction with connecting their host serial device to one of our serial RS-232 devices. In this setting it simply means the two serial devices are interconnected without interposing modems. That is, each device’s serial port transmit line is connected to the corresponding device’s serial port receive line and the signal ground is interconnected. The concept of “null modem” actually originates from the earliest days of computers talking to one another using modems over phone lines. Specifically, North American Air Defense, or NORAD, needed a technology for their computers to communicate over phone lines in the 1950s and the modem was invented...read more.