Rockwell Automation 1772-LV Mini-PLC - 2/15 Programmable Controller (Series B) Programming and Operations - Manual (Page 181)

Quick Reference Section
Appendix A
AĆ12
Table A.I
Jump/Subroutine Instructions
Key Symbol Instruction Name
1770-T3
Display Explanation and Rung Conditions
SBR
T. END
Subroutine Area SUBROUTINE
AREA
Establishes the boundary between main program and
subroutine area. Subroutine area is not scanned unless
directed to do so by a JSR instruction.
-(LBL)- Label XX
-(LBL)-
This condition instruction is the target destination for JMP and
JSR instructions.
-(JMP)- Jump XX
-(JMP)-
XX - two digit octal identificatio nmber, 00-07.
-( JSR )- Jump To Subroutine XX
-( JSR )-
When rung is true, processor jumps to referenced label in
subroutine area.
Same as LBL with which it is used.
-(RET)- Return -(RET)- No identification number. Can be used unconditionally.
Returns the processor to the instruction immediately following
the JSR in the main program that initiated the jump to
subroutine.