| 摘要 |
<p>PURPOSE:To attain multiplex communication at a low cost by changing the communication period of a communication control part by using a changing means included in a control unit connecting slow and rapid multiplex transmission lines so as to cross them and selectively using any one of communication drivers connected to respective transmission lines. CONSTITUTION:A multiplex transmission equipment is provided with the 1st to 7th control units 4 to 10, the frames of the units 5 to 10 are turned to a return ON state in response to the transmission ON state of a start frame outputted from the unit 4, and when the unit 4 checks the start of all the units 4 to 10, a multiplex communication state is started. Thereby the 3rd to 5th control units 6 to 8 are connected to the 1st and 2nd multiplex transmission lines 2, 3 having respetively different transmission periods so as to cross over the lines 2, 3, and at the time of transmission, these units 6 to 8 are driven. Either one of a slow communication driver 17a and a rapid communication driver 17b is selected for the slow and rapid transmission lines 2, 3 and only one multiplex communication control part 19 consisting of an expensive IC is used for the equipment.</p> |
