| 摘要 |
PURPOSE:To extend the inspection width of a sequencer and shorten the inspection time by writing preliminarily external states, in which various inspection patterns appear, in an ROM and changing the pattern for every inspection. CONSTITUTION:An ROM5 where external states in which various inspection patterns appear are written is arranged in a supervisory CPU2. A main CPU1 receives the status signal from a device to be controlled through an input interface part 4 and transmits a control signal through an output interface part 3. At an inspection time, a prescribed inspection pattern is read out from the ROM5 by the supervisory CPU2 and is written in a latch 4B. It is checked whether the operation of the CPU1 is normal or not on a basis of this inspection pattern. |
