Rockwell Automation 1747-PT1, D1747NP002 Hand-Held Terminal - Manual (Page 335)

Chapter 25
Control Instructions
25–3
Label LBL Input Instruction
[LBL]
1
LBL
F1 F2 F3 F4 F5
ZOOM on LBL –|LBL|– 2.3.0.0.1
NAME: LABEL
LABEL: 1
EDT_DAT
HHT Ladder Display:
HHT Zoom Display:
Ladder Diagrams and APS Displays:
(online monitor mode)
This input instruction is the target of the JMP instruction having the same
label number. You must program this instruction as the first instruction of a
rung. The Jump (JMP) and its corresponding Label (LBL) must be in the
same program file. This instruction has no control bits. It is always
evaluated as true or logic 1.
You can program multiple jumps to the same label by assigning the same
label number to multiple JMP instructions, but assigning the same label
number to two or more labels causes a compiler error.
Important: Do not jump (JMP) into an MCR zone. Instructions that are
programmed within the MCR zone starting at the LBL
instruction and ending at the “End MCR” instruction will
always be evaluated as though the MCR zone is true, regardless
of the true state of the “Start MCR” instruction.
Entering Parameters
Enter a decimal label number from 0 to 999. You can place up to 1000 labels
in your program or subroutine file.
Label (LBL)