| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the cost and the installation space. SOLUTION: A microcomputer 2 serving as a timer control means executes a timer control to send sequentially generated monitor data from a transmission signal transmitter/receiver circuit 5 to a signal line Ls, thereby transmitting to a transmitter unit 30. This allows a program timer unit A to be connected directly to the signal line Ls and hence to be incorporated in a system, without using a contact input terminal used in the conventional system. Thus, the cost and the installation space can be reduced.</p> |
