| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a sequence controller capable of surely matching a system time between information terminal equipment and a programmable controller. SOLUTION: A personal computer 30 obtains a standard time from an internet 50, and updates a system time clocked by its own system clock 40 into a standard time. Afterwards, the personal computer 30 distributes the system time clocked by the system clock 40 through a master programmable controller 10 and a network 15 to programmable controllers 11, 12, and 13 for the control of producing facilities 21, 22, and 23. Thus, the system time of system clocks 41, 42, and 43 of the programmable controllers 11, 12, and 13 is updated into the system time of the personal computer 30.</p> |
