Patent ID: 8265101

Claim:
A synchronization control device of slave devices connected to a network, the synchronization control device comprising: a communication module configured to receive data via the network and to generate a first synchronization signal and a second synchronization signal; a phase locked loop (PLL) configured to generate a first clock signal in response to the second synchronization signal; a processor configured to generate control data and a second clock signal, wherein the control data is generated by the processor according to: the data received by the communication module which is input to and processed by the processor in response to the first synchronization signal when the communication module generates the first synchronization signal; and a timer interrupt generated according to a pre-set period when the communication module fails to generate the first synchronization signal; a multiplexer configured to select either the first clock signal or the second clock signal; and a driver configured to operate in response to the clock signal selected by the multiplexer and to drive an actuator according to the control data generated by the processor.