Allen bradly PLC Programming - RSLogix 500 Shift Registers


Shift registers are handles in SLC 500 with two commands BSL and BSR.
BSL - Shift the bit left using BSL command
BSR- Shift the bit right using BSR command

Working of bit shift register

When you have a false to true transition the bit shift to the left if you using a BSL or the bit shift to right if you using a BSR

The components of BIT SHIFT REGISTER

File : Where your data is going to be
Control : keep tracks of Enable and Done bit ,Keep tracks of positions ,keep tracks of size of the array
Bit address : The location of the bit which will be added to array
Length : Length of the bit array