Allen-Bradley MicroLogix 1000

Using Basic Instructions
6–1
6 Using Basic Instructions
This chapter contains general information about the basic instructions and explains
how they function in your application program. Each of the basic instructions
includes information on:
• what the instruction symbol looks like
• typical execution time for the instruction
• how to use the instruction
In addition, the last section contains an application example for a paper drilling
machine that shows the basic instructions in use.
Bit Instructions
Instruction
Purpose
Page
Mnemonic Name
Purpose
Page
XIC
Examine if Closed Examines a bit for an On condition. 6–4
XIO Examine if Open Examines a bit for an Off condition. 6–4
OTE Output Energize Turns a bit On or Off. 6–5
OTL and
OTU
Output Latch and
Output Unlatch
OTL turns a bit on when the rung is executed, and
this bit retains its state when the rung is not
executed or a power cycle occurs. OTU turns a bit
off when the rung is executed, and this bit retains its
state when the rung is not executed or when power
cycle occurs.
6–5
OSR One-Shot Rising Triggers a one time event. 6–7
Programming
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