| 摘要 |
<p>PURPOSE: To equalize the respective CPUs of the transmission devices or the respective transmission devices in time. CONSTITUTION: A CPU A which has a master clock send a communication time measurement command out to a CPU B as an object of time correction and also actuates a timer. Then when a response to the communication time measurement command is received from the time-corrected CPU B, the predetermined time (t) from the reception of the communication measurement command by the time-corrected CPU B to the transmission of the response is subtracted from the measured time T of the timer to calculate the actual communication time between the CPUs. Then the inter-CPU communication time and time information clocked on the basis of the master clock are reported to the time- corrected CPU B. The time-corrected CPU B corrects time information clocked with its internal clock on the basis of the inter-CPU communication time and time information reported from the CPU A.</p> |
