| 摘要 |
<p>PURPOSE:To easily extend a system by executing load operation control in response to the operation of an operation device and executing the processing corresponding to monitor control to a terminal equipment connecting to a subordinate signal line from a main central processing unit. CONSTITUTION:A central processing unit A and plural terminal equipments B are connected by a 2-wire signal line L and a specific address is set individually to each terminal equipment B and the unit A specifies an address by using a transmission signal. Thus, each terminal equipment B is accessed individually and a signal is sent in time division multiplex between the unit A and each terminal equipment B. In the case of operation control of plural loads Z by the operation of one switch S, when plural control terminal equipments B2 controlling the loads Z are employed, the unit A accesses each terminal equipment B2 in the order of the address to send control data. A sub central processing unit A2 receives a transmission signal from the unit A1 connecting to a host signal line L1 and returns monitor data.</p> |
