Yaskawa MP900 Series Ladder Programming Manual - Manual (Page 394)

B.1 Correspondence between CP (Previous) Ladder Instructions and New Ladder Instructions
B-2
B.1 Correspondence between CP (Previous) Ladder Instructions
and New Ladder Instructions
Changing from CP ladder programs to new ladder programs involves changes to some instructions and the addi-
tion of new instructions.
This section tells you what to do in new ladder programs for instructions that can be used only in CP ladder pro-
grams.
It also provides a list of instructions that can be used only in new ladder instructions.
( 1 ) Handling Instructions Supported Only by CP (Previous) Ladder Programs in New Ladder
Programs
( 2 ) Instructions That You Can Use Only in New Ladder Programs
Instruction Name Function Outline Procedure in New Ladder Programs
Instructions in [ ] Brackets
Instructions in [ ] brackets are executed only when
the value of the B register is ON.
Use the IF instruction. IFON instruction
Processing up to the IEND instruction is executed
only when the value of the B register is ON.
IFOFF instruction
Processing up to the IEND instruction is executed
only when the value of the B register is OFF.
Call User Function
instruction
A user function is called.
Use the FUNC instruction. Function Input instruction
The input data is stored in the function input regis-
ter.
Function Output instruc-
tion The data in the function output register is stored in
the specified register.
Comment instruction
Text with double quotation marks (“ ”) is treated
as a comment.
Use rung comments.
Integer Replacement
instruction Data is replaced in an A register and the integer
operation is started.
Use the STORE instruction.
Real Number Replace-
ment instruction Data is replaced in an F register and the real num-
ber operation is started.
Store instruction
The contents of the A or F register is stored in the
specified register.
Instruction Name Function Outline
IF instruction
The programming between the IF and END_IF instructions is executed while the conditional expres-
sion for the IF instruction is satisfied.
FUNC instruction A user function is called.
STORE instruction Integer, double-length integer, or real number data is stored in a register.
EXPRESSION instruction A numeric expression is written.
MLINK-SVW instruction
The specified SERVOPACK parameter is written.
MOTREG-W instruction The specified motion register is written.
MOTREG-R instruction The specified motion register is read.