Using I And J Subscripts - YASKAWA MP210 Series User Manual

5.3.3 Using i and j Subscripts

Two special register modifiers, i and j, can be used with relay and register numbers. The functions of i and j are
identical. They are used for handling register numbers as variables.
Examples of each register data type are used to explain the use of i and j.
(1) Bit Registers with Subscripts
These are the same as when i or j values are added to relay numbers.
For example, when i = 2, MB000000i is the same as MB000002. And when j = 27, MB000000j is the same as
MB00001B.
(2) Integer Registers with Subscripts
These are the same as when i or j values are added to register numbers.
For example, when i = 3, MW00010i is the same as MW00013. And when j = 30, MW00001j is the same as
MW00031.
(3) Double-length Integers and Real Numbers with Subscripts
These are the same as when i or j values are added to register numbers. For example, when j = 1, ML00000j is the
same as ML00001. And when j = 1, MF00000j is the same as MF00001. For double-length integers and real
numbers, the word that indicates a register is the lower word. Caution is required because this means that
ML00001 and MF00001 will be different when j = 0 and when j =1 because the upper and lower words will differ
as shown in the following example.
Equivalent
Equivalent
Double-length Integer Type
ML00000j when j = 0: ML00000
ML00000j when j = 1: ML00001
Real Number Type
MF00000j when j = 0: MF00000
MF00000j when j = 1: MF00001
Upper word Lower word
MW00001 MW00000
MW00002 MW00001
Upper word Lower word
MW00001 MW00000
MW00002 MW00001
5.3 Registers
5
5-27