Appendices; Appendix 1 Module Labels - Mitsubishi Electric MELSEC iQ-R Series User Manual

APPENDICES

Appendix 1
I/O signals, buffer memory, link special relay (SB), and link special register areas (SW) of a master/local module can be set
using module labels.
Structure of a module label
A module label consists of the following names.
"Instance name"_"Module number"."Label name"
"Instance name"_"Module number"."Label name"_D
Ex.
BT11_1.bIn_ModuleReady
■Instance name
The instance name of a master/local module is as follows.
Module model name
RJ61BT11
■Module number
A module number is assigned to distinguish the modules having the same instance name, counting from "1".
■Label name
A label name is a module-specific name.
■_D
This symbol indicates that the module label is for direct access. A label without this symbol is for refresh. The following table
lists the differences between refresh and direct access.
Type Description
Refresh The values read from/written to the module label are collectively reflected to the module when refresh is
executed. The time required for the execution of a program can be shortened.
Direct access The value read from/written to the module label is reflected to the module immediately. Although the
execution time of the program is longer than the one at refresh, the responsiveness is improved.
APPX
134

Appendix 1 Module Labels

Module Labels
Instance name
BT11
Access timing
When refresh is executed
When a value is read from/
written to the module label