| 摘要 |
PURPOSE:To always stop an ascent/descent carrier at a position appropriate to working, by comparing a set numbers and a present number with each other to stop the carrier when the numbers coincide with each other. CONSTITUTION:A destination bay and a destination level are set so that a set number 23 of pulses corresponding to a cargo placing section 15 which is a warehouse entry object is taken out of a memory 22 and entered into a comparator circuit 24. When a vertical drive means 10 of an ascent/descent carrier is started, the number 25 of calculation pulses obtained from an addition/subtraction counter 19 is compared with the set number 23 of pulses. An ascent instruction signal 26 or a descent instruction signal 27 is sent out depending on the result of the comparison of the numbers 25, 23. A stoppage instruction signal 28 is sent out when the numbers are equal to each other. |
