Mitsubishi Electric MELSEC iQ-R Series User Manual page 136

■Data format
The string that represents the data size of a buffer memory area is given. Each data format is as follows:
Data format
u
w
d
z
■Label name
The label identifier unique to a module is given.
■_D
This string indicates that the module label is for the direct access. A module label without the string is for the auto refresh. The
following table shows the differences between the auto refresh and direct access.
Type Description
Auto refresh Values that are read from or written to the module label are
reflected in the module collectively at the auto refresh. The run
time of the program can be reduced. To use the auto refresh, set
"Target" to "Module Label" in "Refresh settings" of "Module
Parameter".
Direct access Values that are read from or written to the module label are
reflected in the module instantly. Compared with the auto refresh,
the run time of the program becomes longer. However, the
responsiveness is high.
APPX
134
Appendix 1 Module Label
Description
Word [Unsigned]/Bit string [16-bit]
Word [Signed]
Double word [Signed]
System area
Access timing
At auto refresh
At reading/writing
from/to the module
label
Example
R60DAH_1.stnControl[0].wDigitalValue
R60DAH_1.stnControl_D[0].wDigitalValue_D