Yaskawa MP900 Series Motion Programming Manual - Manual (Page 172)

Variables (Registers)
5.1.1 Overview of Variables
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5.1 Overview
This section summarizes the variables used in motion programs.
5.1.1 Overview of Variables
In a motion program, variables can be coded in place of numeric values. When variables are
used in actual operations, the numeric values stored in the variable area are retrieved.
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Types of Variable (Registers)
The seven types of register shown in the following table can be used as variables in a motion
program. The S, M, I, O, and C registers are global variables that can be used in common by
motions programs and ladder logic programs.
The # and D registers are local variables that can be referenced only by specific programs. Be-
cause local variables are stored in user memory, the unused capacity of the programs will be
reduced.
Table 5.1 Types of Variable
Type Name Designation Method Range Description Character-
istic
S System
Registers SB, SW, SL, SFnnnnn SW00000 to
SW01023 Registers that can be referenced by the system.
Register No. nnnnn is a decimal expression.
When the system is started, SW00000 to
SW00049 are cleared to 0. Common to
programs
M Data
Registers MB, MW, ML, MFnnnnn MW00000 to
MW32767
Registers common to all drawings.
Used as interfaces between drawings.
Register No. nnnnn is a decimal expression.
I Input
Registers IB, IW, IL, IFhhhh IW0000 to
IW07FF Registers used for I/O Module input data.
Register No. hhhh is a hexadecimal expression.
Register numbers C000 and onward are used as
interfaces with the servo monitor parameters.
O Output
Registers OB, OW, OL, OFhhhh OW0000 to
OW07FF Registers used for I/O Module output data.
Register No. hhhh is a hexadecimal expression.
Register numbers C000 and onward are used as
interfaces with the servo setting parameters.
C Constant
Registers CB, CW, CL, CFnnnnn CW00000 to
CW4095 Registers that can be referenced only by a pro-
gram.
Register No. nnnnn is a decimal expression.
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