Bradley Smoker PLC-5 Btr, Requeued, Btw, Identifies the number of words in the transfer. a

D-26Instruction Set Quick Reference

Instruction Description

BTR

BLOCK TRANSFER READ

Rack	1
Group	0
Module	0
Control Block	BT11:100
Data File	N10:110
Length	40
Continuous	Y

Block Transfer Read	If the input conditions go from false to true, a block transfer
BTR	read is initiated for the I/O module located at rack 1, group 0,
	module 0. The Control Block (BT11:100, 6-word file) contains
	status for the transfer. The Data File (N10:110) is where the
	data read from the module is stored. The BT Length (40)
	identifies the number of words in the transfer. A non-continuous
	block transfer is queued and run only once on a false-to-true
	rung transition; a continuous block transfer is repeatedly
	requeued.
	You can also use the N data type for the control blocks.
	See page F-8 for a description of prescan operation for
	this instruction.

PLC-5/30, -5/40, -5/40E, -5/40L		PLC-5/40, -5/40L, -5/60,		PLC-5/60, -5/60L,
-5/60, -5/60L, -5/80, -5/80E		-5/60L, -5/80, -5/40E,		-5/80, -5/80E controllers
controllers		-5/80E controllers
S:7	BT queue	S:32	BT queue	S:34	BT queue
bit #	full for rack	bit #	full for rack	bit #	full for rack
08(1)	0	08	10	08	20
091	1	09	11	09	21
101	2	10	12	10	22
111	3	11	13	11	23
12	4	12	14	12	24
13	5	13	15	13	25
14	6	14	16	14	26
15	7	15	17	15	27

(1)PLC-5/11, -5/20, and 5/20E controllers also

Instruction Description

BTW

BLOCK TRANSFER WRITE

Rack	1
Group	0
Module	0
Control Block	BT11:0
Data File	N10:10
Length	40
Continuous	Y

Block Transfer Write	If the input conditions go from false-to-true, the block
BTW	transfer write is initiated for the I/O module located at rack
	1, group 0, module 0. The Control Block (BT11:0, 6-word file)
	contains status for the transfer. The Data File contains the
	data to write to the module (N10:10). The BT Length (40)
	identifies the number of words in the transfer. A
	non-continuous block transfer is queued and run only once
	on a false-to-true rung transition; a continuous block
	transfer is repeatedly requeued. You can also use the N
	data type for the control block.
	See page f-8 for a description of prescan operation for this
	instruction.

Publication 1785-UM012D-EN-P - July 2005