in a ge fanuc i am converting i have a rotate word left instruction

any idea what the allen bradley instruction would be ???

There is no A-B instruction called ROTATE, the closest you're going to get is a Bit Shift Left.

Using the BSL as a starting point you can 'roll your own' with a few other instructions to create this function.

If the output bit is unused, the BSL by itself would suffice.

Possible work around:

You can shift bits in a word by multiplying or dividing by powers of 2.
Multiplying shifts the bits left, dividing shifts them right.

A eight bit shift would require 2^8 (256) for example.