Yaskawa Ladder Works Operation Manual - Manual (Page 20)

2.1 PROGRAMMING
2-3
(4) Rung
This is basic line that instruction and branch are located on.
(5) Rung Comment
This is a comment for a rung. One or more rung comments is available for a rung.
(6) Instruction
This is instruction for the ladder editing. It is classified into another kind.
(7) Branch
This is a branch that shows the parallel circuit.
(8) Rung Left Power Rail
a. Rung Number
The rung number is displayed in order.
b. Step Number
The number of total steps to previous rung is displayed.
c. Nesting Number
The number of nesting is displayed.
Notes: The nesting number is increased using IF, FOR, and WHILE instruction.
(9) END instruction
This instruction is prepared at creating a program automatically.
The Cut and Delete operation is prohibited.
(10) Edit Mark
This mark Shows the rung edited after the normal termination of verification.