b in addition a constructional view showing elevator equipment shall be omitted from illustration because of the similarity to fig4 further since the movement of a cage and the generation of a velocity command are similar to those in the prior art method they shall not be repeatedly described as the first embodiment of this invention fig1 shows the flow chart for calculating the delay time t 1 of a control system during the deceleration of a cage 6 the velocity signal of a tachometer generator 19 is applied through the third input converter 24 to a cpu 14 here the applied signal is differentiated to obtain a deceleration value and such a value is stored in a ram 17 every calculation cycle during the stop of the cage 6 the deceleration values stored in the ram 17 during the travel of this cage are analyzed and discriminations are done so as to bring the delay time t 1 near to a theoretical value more specifically when the cage 6 is decided to be traveling at a step 30 whether it is under deceleration is determined at a step 31 and if not no further processing is executed if the cage 6 is under deceleration a step 32 clears a delay time calculating mask flag in advance and a step 33 differentiates the velocity signal applied from the tachometer generator 19 and stores the result in the ram.