Yaskawa YASNAC PC NC PLC Programming Manual - Manual (Page 142)

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YASNAC PCNC PLC Programming Manual Chapter 4: Sequence Control Method
Error list file.
7.3.3 Complier Check Items
The compiler checks the source file for the format whether it is written in the processing
permitted format. In addition to this check, it also checks the following items.
(1) Instruction Check
• Operand code check
Permitted: LD, LD-NOT, AND . . .
Not permitted: ABS, XOR-NOT . . .
• Operand number check
Permitted: DEC #1001, OFFH . . .
Not permitted: DEC #1001 . . .
• Operand address designation range check
Permitted: LD #10001 . . .
Not permitted: LD #10 . . .
• Operand constant designation range check
Permitted: MV1 #1405, 55H . . .
Not permitted: MV1 #1405, OFFFFH
(2) The Number of Setting Characters
For the characters to be set to the ladder table, the compiler checks the number of
characters whether it is within the upper and lower limits.
(3) Output Contact Check
• The compiler checks the output addresses of the OUT instruction whether they
are all unique.
• It also checks the output contact addresses whether they are within the specified range.
(4) Check on MCR/END and Nest Level
The compiler checks the correspondence between MCR and END, and also the nesting level.