A soft starter drives the control circuit c of three electric motors

The control circuit of JJR1000X soft starter driving three motors is shown in the figure. Each motor can be operated independently
, in no particular order. The time interval between two operations is greater than 60s. Soft starter function code 9 (control mode) needs to be set
to external control.
    The intermediate relays 1KA, 2KA and 3KA in the control loop are interlocked to ensure that the contactors 1KM1, 2KM1 and
3KMi, 1KMz, 2KMz and 3KM2 cannot be put into use at the same time to avoid short circuit accidents.