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

APPENDICES

Appendix 1
The I/O signals, buffer memory, link special relay (SB), and link special register (SW) of the RJ71GN11-T2 can be set using
module label.
Structure of the module label
The module label name is defined with the following structure.
"Instance name"_"Module number"."Label name"
"Instance name"_"Module number"."Label name"_D
Ex.
GN11_1.bSts_DataLinkError
■Instance name
The following is the instance name of the RJ71GN11-T2.
Module name
RJ71GN11-T2
■Module number
A sequential number starting with "1" for identifying a module from the one with the same instance name.
■Label name
A label name unique to the module.
■_D
This symbol indicates that the module label is for direct access. The label without "_D" is for link refresh. The following are the
differences between link refresh and direct access.
Type Description
Link refresh The values read/written from/to the module labels are reflected to the module at link refresh. The
execution time of the program can be shortened.
Direct access The values read/written from/to the module labels are reflected to the module immediately. Although
the execution time of the program is longer than the one at the link refresh, the responsiveness is
improved.
When multiple RJ71GN11-T2s with the same network number are mounted and the module labels of link
special relay (SB) and link special register (SW) are used for direct access, the access target is the module
having the smallest slot number on the base unit.
APPX
238

Appendix 1 Module Label

Module Label
Instance name
GN11
Access timing
At link refresh
At writing to or reading from
the module label