Patent ID: 7522636
Filing Date: 2009-04-21
Classification: G05B,G08C,H04J,H04L

Abstract:
1. A control system, comprising: a main control apparatus configured to connect to a single signal line; and a plurality of equipments respectively configured to connect to a multipoint line, each multipoint line being diverged from the single signal line; wherein the main control apparatus sends a control signal to the single signal line using a frequency uniquely assigned to each equipment, each equipment receives the control signal from the multipoint line using the frequency uniquely assigned to each equipment, the main control apparatus sends a synchronization notice to the single signal line using the frequency uniquely assigned to each equipment, each equipment waits for synchronization until a broadcast signal is received from the multipoint line after the synchronization notice is received, the main control apparatus sends the broadcast signal as a trigger to coincide time axes of each equipment to the single signal line using a frequency commonly assigned to each equipment, and each equipment receives the broadcast signal from the multipoint line using the frequency commonly assigned to each equipment.