Shift Register - Easy Electronics xLogic Micro PLC User Manual

6.5.20 Shift register

Short description
The shift register function can be used to read an input value and to shift the bits. The output value
corresponds with the configured shift register bit. The shift direction can be changed at a special input.
Connection
Input In
Input Trg
Input Dir
Parameter
Output Q
151
Description
The function when started
reads this input value.
The SFB is started with a
positive edge (0 t 1
transition) at input Trg
(Trigger). A 1 to 0 transition
is irrelevant.
You define the shift direction
of the shift register bits
S1...S8 at the Dir input:
Dir = 0: shift up (S1 >> S8)
Dir = 1: shift down (S8 >>
S1)
Shift register bit that
determines the value of
output Q.
Possible settings: S1 ... S8
Retentivity set (on) = the
status is retentive in
memory.
The output value
corresponds with the
configured shift register bit.