GE 90-30/20/Micro manual Parameters

4

Parameters:

Parameter	Description
enable	When enable is energized and R is not, the shift is performed.
R	When R is energized, the shift register located at ST is filled with zeros.
IN	IN contains the value to be shifted into the first bit or word of the shift register. For
	SHFR_BIT, any discrete reference may be used; it does not need to be byte aligned.
	However, 16 bits, beginning with the reference address specified, are displayed online.
ST	ST contains the first bit or word of the shift register. For SHFR_BIT, any discrete
	reference may be used; it does not need to be byte aligned. However, 16 bits, beginning
	with the reference address specified, are displayed online.
ok	The ok output is energized whenever the function is enabled and R is not enabled.
Q	Output Q contains the bit or word shifted out of the shift register. For SHFR_BIT, any
	discrete reference may be used; it does not need to be byte aligned. However, 16 bits,
	beginning with the reference address specified, are displayed online.
LEN	LEN determines the length of the shift register. For SHFR_WORD, LEN must be
	between 1 and 256 words. For SHFR_BIT, LEN must be between 1 and 256 bits.

Valid Memory Types:

Parameter

flow

%I

%Q

%M

%T

%S

%G

%R

%AI

%AQ

const

none

enable

•

R

•

IN

•

•

•

•

•

•

•

•

•

•

ST

•

•

•

•

•†

•

•

•

•

ok

•

•

Q

•

•

•

•

•†

•

•

•

•

•Valid reference for BIT or WORD data, or place where power may flow through the function. For SHFR_BIT, discrete user references %I, %Q, %M, and %T need not be byte aligned.

†%SA, %SB, %SC only; %S cannot be used.

4-78 Series 90-30/20/Micro Programmable Controllers Reference Manual–September 1998 GFK-0467K