5
ACCESS VIA NETWORK MODULES
5.4 CC-Link IE Controller Network Module Access Function
5.4.4 Link device refresh setting
5 - 49
1
OVERVIEW
2
SYSTEM
CONFIGURATION
3
SPECIFICATIONS
4
FUNCTIONS
5
ACCESS VIA NETWORK
MODULES
6
PREPARATORY
PROCEDURES AND
SETTING
7
I/O NUMBER
ASSIGNMENT
8
MEMORIES AND FILES
3) Variation in total link device refresh time
The total link device refresh time varies depending on the operating conditions
of the C Controller system.
It may take longer time if the interrupt processing or high-priority task
processing, such as the following, is activated during link device refresh.
• Shell command
• Workbench/Tornado connection
• File access
• Mount/unmount of a CompactFlash card
• Ethernet communications
• NFS server communication
• Processing of a bus interface driver
*1
* 1 Functions to transmit with peripheral devices, functions to communicate with an intelligent function
module, etc.
4) Checking the total link device refresh time
The total link device refresh time during operation of the C Controller system
can be checked in "Link device refresh time (Max./Min./Current)" in the
<<Module information>> tab of CC IE Control utility.
Figure 5.46 Variation in total link device refresh time
Figure 5.47 Link device refresh time
Interrupt
processing
Total link device
refresh time
increased
High-priority task
processing
Link device refresh processing
C Controller
module processing
Link device
refresh
Link scan
Link device
refresh cycle
Total link device refresh time during
C Controller system operation
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