Abstract: A method and apparatus can detect errors within an incorrect media access control address and can prevent an Ethernet device from using the incorrect media access control address while it is fully operating. The method and apparatus can also correct some types of errors within the media access control address so that the Ethernet device may operate using a correct media access control address.

Abstract: A set of processes are disclosed for compressing and decompressing bitmapped picture files that are to be stored for later display within a control for an HVAC system. The compression process includes an examination of the first bitmapped pixel in a given bitmapped file followed by a counting of the number of consecutive pixels having the same state as the first pixel. The process continues with analyses of successive numbers of pixels of first one state and then another state and generating a numerical representations as to each number of so counted pixels until the last pixel of the bitmapped picture file data is analyzed. The resulting compressed file is stored in a memory within a control for an HVAC system so that the file can thereafter be read when the file is to be displayed.

Abstract: HVAC network devices are provided with radio frequency identification tags (RFID tags) which can be read by a read/write device. The read tag identification of each network device is stored in memory within the HVAC network device. A device capable of reading the RFID tags of the HVAC network devices will be used by a person to assign network addresses to each network device. In particular, the person will use information concerning the location of an HVAC network device to determine the network address that is to be assigned to the network device. The thus identified network address along with the tag identification is transmitted to a network controller for the communication network. The network controller will transmit a configuration message over the communication bus that will include the tag identification as well as the desired network address.

Abstract: HVAC network devices are provided with radio frequency identification tags (RFID tags) which can be read by a read/write device. The read tag identification of each network device is stored in memory within the HVAC network device . A device capable of reading the RFID tags of the HVAC network devices will be used by a person to assign network addresses to each network device. In particular, the person will use information concerning the location of an HVAC network device to determine the network address that is to be assigned to the network device. The thus identified network address along with the tag identification is transmitted to a network controller for the communication network. The network controller will transmit a configuration message over the communication bus that will include the tag identification as well as the desired network address.

Abstract: A set of processes are disclosed for compressing and decompressing bitmapped picture files that are to be stored for later display within a control for an HVAC system. The compression process includes an examination of the first bitmapped pixel in a given bitmapped file followed by a counting of the number of consecutive pixels having the same state as the first pixel. The process continues with analyses of successive numbers of pixels of first one state and then another state and generating a numerical representations as to each number of so counted pixels until the last pixel of the bitmapped picture file data is analyzed. The resulting compressed file is stored in a memory within a control for an HVAC system so that the file can thereafter be read when the file is to be displayed.