Parallel transmission path state confirmation device, image processing apparatus, parallel transmission path state confirmation method, and parallel transmission path state confirmation program

摘要

PROBLEM TO BE SOLVED: To easily, inexpensively, and precisely check a parallel transmission path state.SOLUTION: In a composite device 1, a parallel transmission path state checking device 60 checks start of connection state checking processing of a plurality of communication lines between an engine control section 20 and a charging device 40, which are devices, by using two communication lines as the specified communication lines among the communication lines of a parallel transmission path 50 connecting the engine control section 20 and the charging device 40 in parallel by the communication lines. When the checking is completed, the device sequentially checks connection of a prescribed number of other communication lines by using the two specified communication lines and the other communication lines, and checks the connection state of all the other communication lines. When the connection state of all the communication lines is checked, termination of the connection checking of the communication lines is checked by using the specified communication lines.