Rockwell Automation 1761 MicroLogix 1000 Programmable Controllers - Manual (Page 181)

Using Program Flow Control Instructions
10–3
Using LBL
This input instruction is the target of JMP instructions having the same label
number. You must program this instruction as the first instruction of a rung. This
instruction has no control bits.
You can program multiple jumps to the same label by assigning the same label
number to multiple JMP instructions. However, label numbers must be unique.
Note 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.
Programming