Mitsubishi Electric MELIPC MI5000 Series, User Manual

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7 CC-Link IE Field Network Basic FUNCTION
7.1 Cyclic Transmission
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Link scan operation
This section shows the operation of link scan.
After sending requests to all slave stations, the master station starts another link scan after the configured link scan time has
elapsed.
A link scan is carried out for each configured link scan time.

The master station sends requests to slave station 1/slave station 2.
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Slave station 1 returns a response to the master station.
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Slave station 2 returns a response to the master station.

After the configured link scan time elapses, the master station starts sending another request.
Link scan time settings
Configure the link scan time using "Link Scan Time Settings" of "CC-Link IEF Basic Setting". (

Page 162 BASIC
PARAMETERS)
■ When the link scan time setting is disabled (setting value: 0 ms)
After completion of a link scan, the next link scan starts immediately.
■
When the link scan setting is enabled
After completion of a link scan, link scan is stopped until the configured link scan time passes.
The next link scan is started after the configured link scan time passes.
Link scan time check
Link scan time maximum, minimum, and current values can be confirmed using the following method.
* 1
*1 The maximum and minimum values of the link scan time indicate the maximum and minimum values from the time the power supply of
this product was turned ON until it was turned OFF. When the transmission cycle was changed by a C Controller dedicated function
(CCPU_ChangeCCIEFBCycPrm) during cyclic transmission, the maximum and minimum values of the link scan time are reset.
• CC-Link IE Field Network Basic diagnosis(

Page 90 CC-Link IE Field Network Basic diagnostics)
• Buffer Memory (

Page 282 List of Buffer Memory)
Ls: Link scan
(1) Master station
(2) Slave station 1
(3) Slave station 2
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(1) (2) (3)
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