| 20090177811 | I/O DEVICE, NETWORK SYSTEM WITH I/O DEVICE AND COMMUNICATION METHOD IN NETWORK SYSTEM WITH I/O DEVICE - An I/O device is provided to accurately synchronize clocks between nodes to have a device driving signal directly made out from the clocks, so that operation timing can be synchronized between the nodes regardless of a processing flicker on a host computer and a delay in a communication channel, and so that sending and receiving of a communication frame between the nodes, updating of contents of the communication frame, etc. can be efficiently performed. The I/O device comprises receiving means for receiving information including at least contents instructing an input and output time to a device, time tag generating means for generating a time tag indicative of the input and output time included in the received signal to output the same to device control means, and clock means for generating a clock signal indicative of the present time, wherein the device control means compares the input and output time indicated by the time tag output from the time tag generating means with the present time indicated by the clock signal output from the clock means to output designated data to a device or input data from the device at the input and output time. | 07-09-2009 |
