Mitsubishi MELSEC-Q Series User Manual page 102

4
FUNCTIONS
4
- 22
4.4 MELSECNET/H Module Access Function
4.4.2 Link device access
(c) Link device refresh
Data are refreshed between the link devices and internal link device buffers are
refreshed by the link device refresh cycle and refresh parameters set in the
MELSECNET/H utility.
( Section 4.4.4)
The ranges that are set by the refresh parameters from the <<Parameter
settings>> tab of the MELSECNET/H utility and that are set in Network range
assignment are refreshed.
C Controller module
Range to be
actually
refreshed
Range set by
refresh
parameters
POINT
The internal link device buffers where link device refresh is not performed can be
used as internal memories of the user program.
Internal link
device buffers
Link device
refresh
Applicable
as internal
memory
Link device
refresh
Applicable
as internal
memory
Link device
refresh
Applicable
as internal
memory
Figure 4.16 Link device refresh ranges
MELSECNET/H module
Network range
assignment parameter
Range set by
Station
network range
No.1
assignment
(Empty)
Station
No.2
(Empty)
Station
No.3