Mitsibushi "SMOV" Instruction

I am working with Mitsubishi fx3u.. confused with the "SMOV" instruction read through many manuals but couldn't really understand it.

what I want to execute: i want to project an 8bit on the HMI screen and every time the input is high i want the first bit to go high initially.. then move to the second bit.

example:
when the input is sensor detects first time
00000001
When the sensor detects second time
00000011

when sensor detects doesn't detect the third time
00000011

when the sensor detects objects forth time
00001011
Note using SMOV instruction is importanti have already written an alternative logic without SMOV, which works)

Your application sounds more like a SFTL / Bit Shift Left instruction.
The SMOV is a digit shift (4 Bits)

http://dl.mitsubishielectric.com/dl/fa/document/manual/plc_fx/jy997d34701/jy997d34701m.pdf

Regards,

I can't help with Mitsubishi specifically, but a BSL is not quite what the OP seems to be trying to achieve. The OP wants this:

when the input is sensor detects first time
00000001
When the sensor detects second time
00000011

when sensor detects doesn't detect the third time
00000011

when the sensor detects objects forth time
00001011

Click to expand...

...whereas a BSL would look like this:

when the input is sensor detects first time
00000001
When the sensor detects second time
00000011

when sensor detects doesn't detect the third time
00000110

when the sensor detects objects forth time
00001101

Click to expand...

That being said, my suggestion would also be to use a BSL. If the results need to be reversed visually on a HMI or something at the end of the process, that's probably easier than trying to brute-force this using pointers and indirect addressing.