4
- 14
4.1 Cyclic Transmission Function
4.1.4 Direct access to link devices
4
FUNCTIONS
POINT
(1) When assurance of cyclic data integrity of more than 32 bits is desired
Section 4.1.5 Assurance of cyclic data integrity
(2) When a shorter link refresh time is desired
Remove any infrequently used link devices from the link refresh range, and
directly read or write them using link direct devices.
This reduces the points of the link refresh to the CPU module, resulting in a
shorter link refresh time.
Section 6.4 Refresh Parameters
(3) When a shorter transmission delay time is desired
Since the link direct device reads or writes data directly to the link devices of
the CC-Link IE controller network module at the time of the instruction
execution, the transmission delay time can be reduced. (
in instruction execution in this section)
Link refresh is performed in "END processing" of the sequence scan of the
CPU module.
(1) How to specify the link direct device (J
\
)
Specify a network No. and a link device of the target CC-Link IE controller network
module.
Figure 4.13 How to specify the link direct device (J
\
)
J
\
Link relay
B0 to 7FFF
Link register
W0 to 1FFFF
Link input
X0 to 1FFF
Link output
Y0 to 1FFF
Link special relay
SB0 to 1FF
Link special register
SW0 to 1FF
Network No.
1 to 239
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