Bradley Smoker PLC-5 user manual Sequencer Instructions, Lfl, Lfu, Sqi, Sql

Instruction Set Quick Reference D-21

Instruction Description

LFL
LIFO LOAD
Source	N70:1
LIFO	#N70:3
Control	R6:61
Length	64
Position	0

LIFO Load	When the input conditions go from false-to-true, the controller
LFL	loads N70:1 into the next available element in the LIFO file
	#N70:3, as pointed to by R6:61. Each time the rung goes from
Status Bits:	false-to-true, the controller loads another element. When the
EN - Enable	LIFO file (stack) is full (64 words have been loaded), the DN bit
Load	is set.
DN - Done Bit
EM - Empty Bit	See page F-8 for a description of prescan activities for this
	instruction.

LFU
LIFO UNLOAD
LIFO	#N70:3
Dest	N70:2
Control	R6:61
Length	64
Position	0

LIFO Unload	When the input conditions go from false-to-true, the controller
LFU	unloads the last element from #N70:3 and puts it into N70:2.
	Each time the rung goes from false-to-true, the controller
Status Bits:	unloads another element. When the LIFO file is empty, the EM
EU - Enable	bit is set.
Unload
DN - Done Bit	See page F-8 for a description of prescan activities for this
EM - Empty Bit	instruction.

Sequencer Instructions

Instruction Description

SQI

SEQUENCER INPUT

File #N7:11

MaskFFF0

Source I:031

Control R6:21

Length4

Position0

Sequencer Input	The SQI instruction filters the Source (I:031) input image data
SQI	through a Mask (FFF0) and compare the result to Reference data
	(#N7:11) to see if the two values are equal. The operation is
	controlled by the information in the control file R6:21. When the
	status of all unmasked bits of the word pointed to by control
	element R6:21 matches the corresponding reference bits, the
	rung condition remains true if preceded by a true rung
	condition.

SQL

SEQUENCER LOAD

File#N7:20

Source I:002

Control R6:22

Length5

Position0

Sequencer Load	The SQL instruction loads data into the sequencer File (#N7:20)
SQL	from the source word (I:002) by stepping through the number of
	elements specified by Length (5) of the Source (I:002), starting
Status Bits:	at the Position (0). The operation is controlled by the
EN - Enable	information in the control file R6:22. When the rung goes from
DN - Done Bit	false-to-true, the SQL instruction increments the next step in
ER - Error Bit	the sequencer file and loads the data into it for every scan that
	the rung remains true.
	See page F-8 for a description of prescan operation for
	this instruction.

Publication 1785-UM012D-EN-P - July 2005