Mitsubishi Electric MELSEC iQ-R Series User Manual page 196

Station is disconnected from the network
The following is the action to be taken when a station in data link is disconnected.
Check item
Is the ambient temperature for the module outside the specified range?
If the above action does not solve the problem, perform the following tests to check for an error.
• Module communication test ( Page 168 Module Communication Test)
Station is repeatedly disconnected and reconnected
The following lists the actions to be taken when a station in data link is repeatedly disconnected and reconnected.
Check item
Do the used Ethernet cables conform to the Ethernet standard?
Is the station-to-station distance 100m or less?
Does the cabling condition (bending radius) meet the specifications?
Is any Ethernet cable disconnected?
Is the switching hub used operating normally?
Is the station that is the time synchronization source normal?
Are resets of other stations repeated?
Are other stations repeatedly powering on/off?
When "Communication Speed" of the master station is set to "100Mbps", is
"System Reservation Time" in "Communication Period Setting" under "Basic
Settings" of the master station set to 20s?
When "Communication Period Setting" of the master station is set to "1Gbps"
and a CC-Link IE TSN Class B/A device with a communication speed of
100Mbps is used, is "Communication Period Setting" set to "Basic Period" or
"Normal-Speed"?
When "Communication Period Setting" of the master station is set to "1Gbps"
and a CC-Link IE TSN Class B/A device with a communication speed of
100Mbps is used in multicast mode, does the station repeat disconnection
and return even if "Communication Period Setting" is set to "Low-Speed"?
In multicast mode, is the CC-Link IE TSN Class A remote station connected to
the master station, remote station, or CC-Link IE TSN Class A local station?
In multicast mode, are a local station and a CC-Link IE TSN Class A remote
station connected on the end side via a switching hub?
Is '1: Operating with the protocol
version 1.0' stored in 'Protocol
operating status' (Un\G1294016)?
■When connected devices are protocol version 2.0
Is there any difference between the CC-Link IE TSN Class B/A mixed system
configuration and the "TSN HUB Setting" in "Connection Device Information"
under "Basic Settings"?
Does any of the stations break the restrictions of the TSN hub?
4 TROUBLESHOOTING
194
4.4 Troubleshooting by Symptom
Has the cyclic data size exceeded 2K
bytes in total for CC-Link IE TSN
Class A devices connected to the
CC-Link IE TSN Class B devices
other than the master station?
(Including when connected to a CC-
Link IE TSN Class B device via a
general-purpose hub)
Action
Keep the ambient temperature within the specified range by taking action
such as removing heat source.
Action
Replace the cables with Ethernet cables which conform to the standard. (
MELSEC iQ-R CC-Link IE TSN User's Manual (Startup))
Change the station-to-station distance to 100m or less.
Refer to the manual for the Ethernet cable, and if the bending radius exceeds
the specified range, correct the bending radius.
If an Ethernet cable is disconnected, replace the Ethernet cable.
• Use a switching hub that conforms to the standard. ( MELSEC iQ-R CC-
Link IE TSN User's Manual (Startup))
• Power off and on the switching hub.
Check the manual of the module used for the time synchronization source
station.
Avoid unnecessary reset since a station is disconnected while resetting.
Avoid unnecessary power-off, since a station is disconnected while turned off.
Set "System Reservation Time" to 200s.
For a CC-Link IE TSN Class B/A device with a communication speed of
100Mbps, set "Communication Period Setting" to "Low-Speed".
Connect the data link faulty station to the device supporting the multicast filter.
( Manual of the device used)
• Check the connected devices and connect the CC-Link IE TSN Class A
remote station to the CC-Link IE TSN Class B local station.
• Set unicast mode.
• Configure settings with the switching hub so that the multicast frame (with
multicast MAC address 09:00:70:00:10:02 and 09:00:70:00:10:05) will not
be transferred to the port of the standard Ethernet device.
• Check the connected device and do not connect both a local station and a
CC-Link IE TSN Class A remote station on the end side of the switching
hub.
• Set unicast mode.
• Connect to a CC-Link IE TSN Class B device via a TSN hub. (If connecting
via a general-purpose hub, change the general-purpose hub to a TSN hub)
• Limit the number of the connected stations so that the cyclic data size does
not exceed 2K bytes in total for CC-Link IE TSN Class A devices connected
to CC-Link IE TSN Class B devices other than the master station. (Including
when connected to a CC-Link IE TSN Class B device via a general-purpose
hub)
For details, refer to the following.
Page 201 CC-Link IE TSN Class A device does not perform data link
Comply with the restrictions of the TSN hub. For the restrictions, refer to the
manual for the TSN hub used.