GE 90-30/20/Micro manual Nxtseq

4

Note

Coil checking, for the BITSEQ function, checks for 16 bits from the ST parameter, even when LEN is less than 16.

Valid Memory Types:

Parameter

flow

%I

%Q

%M

%T

%S

%G

%R

%AI

%AQ

const

none

address

•

enable

•

R

•

DIR

•

STEP

•

•

•

•

•

•

•

•

•

•

ST

•

•

•

•

•†

•

•

•

•

•

ok

•

•

•Valid reference or place where power may flow through the function.

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

Example:

In the following example, the sequencer operates on register memory %R0001. Its static data is stored in registers %R0010, %R0011, and %R0012. When CLEAR is active, the sequencer is reset and the current step is set to step number 3. The first 8 bits of %R0001 are set to zero.

When NXT_SEQ is active and CLEAR is not active, the bit for step number 3 is cleared and the bit for step number 2 or 4 (depending on whether DIR is energized) is set.

	_____
NXT_SEQ
—— ——— BIT_—
	SEQ
CLEAR
—— ———R
	LEN
DIRECT 00008
—— ———DIR
CONST —STEP
00003
%R0001—ST
	_____
	%R0010

4-82 Series 90-30/20/Micro Programmable Controllers Reference Manual–September 1998 GFK-0467K