224
8.4
CC-Link IE Field Network Function
8.4.1
Cyclic data update watch function
This function is used to watch the time interval between updates on cyclic data. When an update by cyclic transmission
remains to be done for a set period of time for watching, the module "continues its operation and produces external
outputs (HOLD)" or "stops its operation and external outputs (CLEAR)".
A halt in cyclic transmission is indicated by the status of the D LINK LED, flashing (data link established (cyclic
transmission stopped)) or off (data link not established (disconnected)).
Set either HOLD or CLEAR with the control output setting at CPU stop error.
For the control output setting at CPU stop error, refer to the following.
• HOLD/CLEAR function (
(1) Setting method
1.
Set "Method selection" to "Param write (Station parameter)".
"CC IE Field Configuration" window
Select the temperature control module from "List of
stations"
[CC IE Field Configuration]
[Online]
[Parameter Processing of Slave Station]
2.
Set a time period for watching for "Cyclic data update watch time setting".
When setting the cyclic data update watch time setting, set a time period longer than the link scan time.
Item
Setting range
Cyclic data update watch time setting
• 0 (no watch)
• 1 to 20 (0.1 to 2 seconds, in steps of 100ms)
Common
Master station
Remote device
station
The cyclic data are updated within
the data link update time.
Cyclic data
When the cyclic data update interval
exceeds the set time, the control
becomes the HOLD/CLEAR status.
Monitoring starts when cyclic data
are received for the first time.
Cyclic data update
watch time setting
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