| 摘要 |
A dynamic data exchange (DDE) server (100) which allows external programs to access power management data is presented. The DDE server (100) provides a mnemonic cross reference between register items and standardized, alphanumeric parameter names. This mnemonic interface allows the user to retrieve data from a device without knowledge of the actual device register item number. The DDE server (100) is optimized for either the Modbus RTU or Ethernet protocol. The DDE server (100) acts as a link between a client requesting device data and a field device which can provide the data. The DDE server (100) communicates to the field device through communication ports and to the client via DDE or NetDDE message link. A client sends its requests to server to read/write some device registers. The server maps each request to suitable device read/write request packets and carries out the necessary transaction with device. Then it relays the result back to the client after processing and casting the collected device data to proper format. To configure the DDE server (100), the user can export and import files containing register groups and mnemonics in comma separated value format. By importing and exporting register groups and mnemonics, the user can change the firmware revision register map or mnemonics of a device class supported by the DDE server (100), change the number or types of registers or mnemonics, or add a new generic device type.
|
