Yaskawa MP900 Series Machine Controller New Ladder Editor - Manual (Page 244)

Appendix A Expression
A.2.1 Arithmetic Operator
A-6
A.2 Recognizable Expression
The Expression is described by combining the operand and the operator. There are some restric-
tions in the description method. The restriction is explained as follows.
A.2.1 Arithmetic Operator
This operator can be used for the operand of the integer type and the real type.
The monadic minus can be used only once. The bit operation can use only the integer type.
The arithmetic operation cannot be used for the operand of the bit type.
Even if the calculation value exceeds the range of the register, the type conversion is not
automatically done. Therefore, the user should allocate an appropriate type in the variable.
MW00001 = MW00002 + MW00003 OK
MW00001 = MW00002 / 345 OK
MF00002 = (MW00004 + MF00002) / (ML00018 + MW00008)OK
MW00001 = MW00002 & 4096 OK
MB000010 = MB000011 − MB000012 NG
MW00001 = MB000011 ∗ MW00001 NG
A.2.2 Comparison Operator
This operator can be used for the operand of the integer type and the real type.
The register of the bit type should come left. In the case to do the comparison which uses “
=
= ” or “ != ” for the operand of the integer bit type, the comparison object should be an
expression of true/false.
MB000010 = MW00002 != MW00003 OK
MB000010 = MF00002 < 99.99 OK
MB000010 = MW00002 >= MW00003 OK
MB000010 = MB000011 = = true OK
MB000010 = MB000011 != 0 NG
MB000010 = MB000011 = = 1 NG
A.2.3 Logic Operator
This operator can be used only for the operand of the bit type.
MB000010 = MB000011 && MB000012 OK
MB000010 = !MB000011 OK
MB000010 = (MW000020 >= 50) && MB000011 OK
MB000010 = MW00001 || MW00002 NG
MB000010 = !MW00001 NG
EXAMPLE
EXAMPLE
EXAMPLE