Instruction Set
Block Transfer 3-45
block transfer instructions continued...
Instruction Description
Block Transfer
Read
BTR
If the input conditions go from false-to-true, a block transfer read is initiated for the I/O module
located at rack 1, group 0, module 0. The Control Block (N10:100 – 5-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. For Enhanced, Ethernet, and ControlNet PLC-5 processors, you can use
the BT control block.
Block Transfer Write
BTW
If the input conditions go from false-to-true, the block transfer write is initiated for the I/O
module located at rack 1, group 0, module 0. The Control Block (N10:0 - 5-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. For Enhanced, Ethernet, and ControlNet PLC-5 processors, you can use
the BT control block.
BLOCK TRNSFR READ
Rack 1
Group 0
Module 0
Control Block N10:100
Data File N10:110
Length 40
Continuous Y
BTR
BLOCK TRNSFR WRITE
Rack 1
Group 0
Module 0
Control Block N10:0
Data File N10:10
Length 40
Continuous Y
BTW
Comments to this Manuals