Maple Systems MAPware-7000 - Manual (Page 109)

101 MAPware-7000 Ladder Logic Guide
1010-1041 rev. 00
Note:
When the shift input is ON, the shift operation is performed every scan. Use a transitional
contact for the shift input to detect the state changing.
For the data input, the shift input and the enable input, direct linking to a connecting point is
not allowed. In this case, insert a dummy contact (always ON special device = S04F, etc.) just
before the input.