Rockwell Automation 1772-LV Mini-PLC - 2/15 Programmable Controller (Series B) Programming and Operations - Manual (Page 90)

Advanced Instruction Set
Chapter 6
6Ć33
Outputs remain in their last state unless changed by instructions elsewhere in
your program.
WARNING: The counter address of the sequencer output
instruction should be reserved for that instruction. Do not
manipulate the counter preset or accumulated word. Changes to
these values could result in unpredictable machine operation or a
run-time error. Damage to equipment and/or injury to personnel
could occur.
Sequencer Load
Symbol: SEQ 2
Purpose: Places data into the sequencer file that you established in the data
table for this instruction.
Syntax: Programmed as an output instruction.
You can not mask any unused bits.
This instruction requires 4-7 words of the user program area.
Function: A false-to-true rung transition enables the instruction. When the
rung becomes:
True
The instruction increments to the next step and executes the instruction.
(Loads the data).
False
No action is taken.
Use this instruction for:
Machine diagnostics - If when the actual sequence of an operation becomes
mismatched with the desired sequence of operation as contained in the
sequencer input instruction, a fault signal can be enabled by the user
program.
Teach sequential operation - The I/O conditions representing the desired
operation can be loaded into the sequencer input tables as the machine is
manually stepped through the control cycle.