Rockwell Automation 1761 MicroLogix 1000 Programmable Controllers - Manual (Page 189)

Using Application Specific Instructions
11–1
11
Using Application Specific
Instructions
This chapter contains general information about the application specific instructions
and explains how they function in your application program. Each of the
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 application specific instructions in use.
Application Specific Instructions
Instruction
Purpose Page
Mnemonic Name
Purpose Page
BSL and
BSR Bit Shift Left and
Bit Shift Right Loads a bit of data into a bit array, shifts the pattern
of data through the array, and unloads the last bit of
data in the array. The BSL shifts data to the left and
the BSR shifts data to the right. 11–5
SQO and
SQC Sequencer Output
and Sequencer
Compare Control sequential machine operations by transfer-
ring 16-bit data through a mask to image addresses. 11–7
SQL Sequencer Load Capture referenced conditions by manually stepping
the machine through its operating sequences. 11–13
STD and
STE Selectable Timer
Interrupt Disable
and Enable Output instructions, associated with the Selectable
Timed Interrupt function. STD and STE are used to
prevent an STI from occurring during a portion of
the program. 11–18
Continued on the next page.
Programming