Rockwell Automation 1747-PT1, D1747NP002 Hand-Held Terminal - Manual (Page 225)

A–B
16 Chapter
16–1
Bit Instructions
This chapter covers the bit instructions with fixed, SLC 5/01, and SLC 5/02
processors:
•
Examine if Closed (XIC)
•
Examine if Open (XIO)
•
Output Energize (OTE)
•
Output Latch (OTL)
•
Output Unlatch (OTU)
•
One–Shot Rising (OSR)
Bit instructions operate on a single bit of data. During operation, the
processor may set or reset the bit, based on logical continuity of ladder rungs.
You can address a bit as many times as your program requires.
The following data files use bit instructions:
•
output and input data files. The instructions represent external outputs
and inputs.
•
the status data file
•
the bit data file. Use these instructions for the internal relay logic of your
program.
•
timer, counter, and control data files. The instructions use various control
bits.
•
the integer data file. The instructions are used (on the bit level) as your
program requires.
Bit Instructions Overview