Abstract: A device that uses parameters to provide multi-channel serial data transmissions and the method thereof are provided. A first serial device configures with the channel parameters corresponding to a procedure executed on a second serial device. The invention determines whether the data channel corresponding to the procedure requires sending/receiving data occupies a physical line. If so, the first serial device transmits data to the second serial device. Otherwise, the first serial device transmits a channel switch request to the second serial device. After the first serial device and the second serial device are both switched the data channel corresponding to the procedure to occupy the physical line, the first serial device and the procedure could exchange data. Therefore, the first serial device could establish new connection without closing original connection. It achieves the goal of using a single serial port to have data channels of different operation modes or connections.

Abstract: A method of determining request transmission priority subject to request source and transmitting request subject to such request transmission priority in application of Fieldbus communication framework in which the communication device determines whether the received requests have the priority subject to the respective source and also determines whether there is any logical operation condition established, and then the communication device transmits the received external requests to the connected slave device as an ordinary request or priority request, preventing the slave device from receiving an important external request sent by the main control end or manager at a late time.

Abstract: A heat-dissipating structure for the expansion board architecture is provided. A fixing element disposed on the heat-absorbing substrate fixes the motherboard and the first expansion board. The heat-generating elements on the motherboard or the first expansion board are directly in touch with the heat-absorbing surface of the heat-absorbing substrate to absorb their heat. The heat-dissipating board extended from the side of the heat-absorbing substrate then dissipates the heat absorbed by the heat-absorbing substrate. The structure thus solves the problems that existing heat-dissipating structures occupy larger space and therefore cannot be effectively used in an expansion board architecture to dissipate heat produced by the heat-generating elements between the motherboard and the expansion board and that it is likely to have assembly tolerance. Using the structure can reduce the space and the assembly tolerance, but effectively enhance heat dissipation in the expansion board architecture.

Abstract: A method for checking a ring network redundancy includes a first exchanger and a second exchanger. When the first exchanger is set as a master, the plurality of second exchangers serve as the ring members; the first exchanger has a connection port, which is set as blocking, and the rest of connection ports are set as forwarding. The plurality of second exchangers regularly detects the plurality of connection ports for any outstanding status occurred in the connection status. When an outstanding status occurred, the CF5 is transmitted to the first exchanger and the first exchanger converts the connection port into the forwarding status, and the CF4 is transmitted to the plurality of second exchangers in order to renew the Mac address table. The method of sending out CF through a plurality of ring members can reduce the risk of losing the CF due to overloading network or having too much single network equipments, and thereby increase the reliability of the ring network during the redundancy checking.

Abstract: A hook structure of the compact flash card has a supporting part and an extension part. The hook part extended from the extension part holds the compact flash card. The supporting part supports the compact flash card. It enables one to quickly and conveniently insert or withdraw the compact flash card on an industry computer. This solves the problems in the prior art that the compact flash card cannot be conveniently inserted into or removed from an industry computer and that the compact flash card easily gets loose, resulting in the industry computer system crash. The hook structure enables convenient replacement of compact flash cards and ensures the stable operation of the industry computer.

Abstract: An RJ45 connector device having a key structure for changing pin definitions is provided. The RJ45 connector device includes a conversion processor, a key, an information processor, and output pins. When the key is pressed to trigger a conversion signal, the conversion processor first converts a part of input information into relay information. Then, according to the conversion signal, the information processor converts the input information and the relay information into output information through designated processing and then output the output information through the output pins, so as to solve the problem that various connector devices occupy a lot of the available space of an electronic device when being used, thereby saving the available space of the electronic device and enabling a single connector device to achieve technical effects of a multi-functional connector device in terms of switching pin definitions.