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.
Timing diagram
Setting the Par parameter
This special function is not available in parameter assignment mode.
Description of the function
The function reads the value of input In with a positive edge (0 to 1 transition) at input Trg (Trigger).
This value is written to shift register bits S1 or S8, depending on the set shift direction:
Shift up: S1 accepts the value of input In; the previous value of S1 is shifted to
S2, S2 is shifted to S3, etc.
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