Rockwell Automation 1761 MicroLogix 1000 Programmable Controllers - Manual (Page 99)

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