Using Program Flow Control Instructions
10–1
10
Using Program Flow Control
Instructions
This chapter contains general information about the program flow 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 program flow control instructions in use.
Program Flow Control Instructions
Instruction
Purpose
Page
Mnemonic
Name
Purpose
Page
JMP and
LBL
Jump to Label and
Label
Jump forward or backward to the specified label
instruction.
10–2
JSR, SBR,
and RET
Jump to
Subroutine,
Subroutine, and
Return from
Subroutine
Jump to a designated subroutine and return.
10–4
MCR
Master Control
Reset
Turn off all non-retentive outputs in a section of
ladder program.
10–7
TND
Temporary End
Mark a temporary end that halts program execution.
10–8
SUS
Suspend
Identifies specific conditions for program debugging
and system troubleshooting.
10–8
IIM
Immediate Input
with Mask
Program an Immediate Input with Mask.
10–9
IOM
Immediate Output
with Mask
Program an Immediate Output with Mask.
10–9
Programming
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