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

APPENDICES

Appendix 1
The I/O signals and buffer memory of RJ71DN91 can be set using the 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.
RDN91_1.bSts_Watchdog_Timer_Error
■Instance name
The following is the instance name of the RJ71DN91.
Model
RJ71DN91
■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 refresh. The following are the
differences between refresh and direct access.
Type Description
Refresh The values read/written from/to the module labels are reflected to the module at 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 refresh, the
responsiveness is improved.
For the instruction processing time, refer to the following:
 MELSEC iQ-R Programming Manual (CPU Module Instructions, Standard Functions/
Function Blocks)
Module Label
Instance name
RDN91
Access timing
At refresh
At reading/writing from/to the module label
APPX

Appendix 1 Module Label

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