| 摘要 |
<p>PURPOSE:To attain the easy monitor even with a non-control device that changes its working state at a high speed by writing previously the desired data to be observed to an observation data memory part during the input/output process and then reading out said data out of the memory part for display. CONSTITUTION:A certain input/output state is designated, and the observation start conditions are stared to a register 12. Then the normal scan is performed until the observation start conditions are satisfied, and the input/output data is compared with the observation start conditions for each scan. When the observation conditions are satisfied, the position of an observation bit is read out of an observation bit position register 13. At the same time, the data on the bit position is extracted out of the input/output data and written to an observation data memory part 14. Thus (n) times of scan are carried out after the observation conditions are once satisfied. Then (n) pieces of observation data are stored in the part 14. These data are read out later of the part 14 and displayed to a display part 11.</p> |
