PCI INPUT AND OUTPUT CARD FOR WEIGHING CONTROL SYSTEM

摘要

A PCI(Peripheral Component Interconnect) IO card for a weighing control system is provided to reduce engineering and test time because of convenient and simple usage as well as to reduce initial investment or maintenance cost by using a PC in configuring the weighing control system. A PCI(Peripheral Component Interconnect) IO card connects an address and timing signal besides output data and input data to an external data interface unit. In a data output operation, the PCI IO card outputs the address, outputs the data, and outputs the timing signal on the output operation and recovers the timing signal if a set time has passed. In a data input operation, the PCI IO card outputs the address, outputs the timing signal on the input operation, inputs data if a set time has passed, and recovers the timing signal. The set time of the timing signal can be adjusted by software of the PC. The external data interface unit performs a safe buffer operation if only enough timing signals are maintained via a decoder.