Mitsubishi Electric MELSEC iQ-F FX5 Series User Manual page 144

When a 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?
When a 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 100 m or less?
Does the cabling condition (bending radius) meet the specifications?
Is any Ethernet cable disconnected?
Is the switching hub used in the system operating normally?
Is the time synchronization source station operating normally?
Are resets of other stations repeated?
Are other stations repeatedly powering on/off?
When "Communication Speed" of the master station is set to "100 Mbps", is "Basic
Settings"  "Communication Period Setting"  "Basic Period Setting"  "System
Reservation Time" of the master station set to 20 s?
When the communication speed of the master station is set to 1 Gbps and a CC-Link IE
TSN Class B/A device with a communication speed of 100 Mbps is used, is
"Communication Period Setting" set to "Basic Period" or "Normal-Speed"?
Is 'Protocol operating status' (Un\91270)
set to "1" (A device is operating with the
CC-Link IE TSN Protocol version 1.0)?
■For firmware version "1.002" or later
Do the system configuration of mixture of CC-Link IE TSN Class B/A and "TSN HUB
Setting" in "Connection Device Information" under "Basic Settings" differ?
Does any of the stations break the restrictions of the TSN switching hub?
When "Communication Speed" of the master station is 1 Gbps, does the cyclic data size
exceed 2K bytes in total for all device stations on the 100 Mbps device side at the
boundary between a 1 Gbps CC-Link IE TSN Class B device except for the master station
and 100 Mbps CC-Link IE TSN Class B device?
8 TROUBLESHOOTING
142
8.4 Troubleshooting by Symptom
Does the cyclic data size exceed 2K bytes
in total for CC-Link IE TSN Class A devices
connected to a CC-Link IE TSN Class B
device except for the master station?
(Including when a general-purpose
switching hub is used to connect to a CC-
Link IE TSN Class B device)
Action
Keep the ambient temperature within the specified range by taking action
such as removing heat source.
Action
If not, replace them with Ethernet cables that satisfy the Ethernet
standard. For details, refer to "WIRING" in the following manual.
MELSEC iQ-F FX5 Motion Module/Simple Motion Module
User's Manual (Startup)
Change the station-to-station distance to 100 m 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.
• Check that a switching hub that conforms to the standard is
used. For details, refer to "WIRING" in the following manual.
MELSEC iQ-F FX5 Motion Module/Simple Motion Module
User's Manual (Startup)
• Power off and on the switching hub.
Take action by referring to the manual for the module of 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 100 Mbps, set "Communication Period Setting" to "Low-
Speed".
• Use a TSN switching hub to connect to CC-Link IE TSN Class B
devices.
(When a general-purpose switching hub is used to establish a
connection, change the general-purpose switching hub to a TSN
switching hub.)
• Restrict the number of connected stations so that the cyclic data
size of the CC-Link IE TSN Class A devices connected to a CC-
Link IE TSN Class B device except for the master station does
not exceed 2K bytes in total.
(Including when a general-purpose switching hub is used to
connect to a CC-Link IE TSN Class B device)
For details, refer to the following.
Page 145 A CC-Link IE TSN Class A device does not perform
data link.
Follow the restrictions for the TSN switching hub. For the
restrictions, refer to the manual for the TSN switching hub used.
• Restrict the number of connected stations so that the cyclic data
size of 100 Mbps devices does not exceed 2K bytes in total.
• Connect 100 Mbps device to the master station.