Question

What is the use of JMP (Jump instruction paired) instruction in PLC?
1. Changing the program
2. Cascading two programs
3. Causing PLC to skip over rungs
4. Changing the instruction

Answer 1

Correct Answer - Option 3 : Causing PLC to skip over rungs

JMP instruction of PLC:

• The JMP instruction is used to cause the PLC to skip over rungs.
• The Jump (JMP) instruction is paired with the Label (LBL) instruction by designating the same address number to each function.
• When the jump rung is TRUE, it causes the ladder program to skip over rungs of the ladder program.

 

If the rung containing the JMP instruction is	Then the Program
TRUE	Skip from the rung with the JMP to the rung containing the designated LBL
FALSE	Does not execute the JMP