Mitsubishi Electric MELSEC iQ-R Series User Manual page 194

Check item
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?
When "Network Topology"
under "Basic Settings" of the
master station is set to "Ring"
Is the minimum value for communication cycle interval set to both "Communication Period
Interval Setting" and "Cyclic Transmission Time" in "Communication Period Setting" under
"Basic Settings" of the module parameter?
Is the minimum value for cyclic transmission time set to "Cyclic Transmission Time" in
"Communication Period Setting" under "Basic Settings" of the module parameter?
In multicast mode, has an external device sent a frame to a station before data link
establishment of all stations?
When "Communication Speed" of the master station is 1Gbps, has the cyclic data size
exceeded 2K bytes in total for all slave stations on the CC-Link IE TSN Class B device side
with the communication speed 100Mbps at the boundary between CC-Link IE TSN Class B
(except for the master station) and CC-Link IE TSN Class A?
■For firmware version "14"
When the communication speed of the master station and the slave station of the CC-Link
IE TSN Class A is 1Gbps, is the "Communication Period Setting" of the slave station of the
CC-Link IE TSN Class A set to "Basic Period" or "Normal-Speed"?
Does a loopback occur or is a loopback not resolved?
Has the communication path using dynamic routing been determined?
Do the relay stations on the communication path support dynamic routing?
If the above actions do not solve the problem, perform the following tests to check for an error.
• Module communication test ( Page 168 Module Communication Test)
• Communication test ( Page 179 Communication Test)
4 TROUBLESHOOTING
192
4.4 Troubleshooting by Symptom
Is a switching hub used?
Is a device not supporting ring topology connected?
Is the communication speed of the master station the
same as the communication speed of slave station?
■For firmware version "13" or earlier
Is a device not set in "Network Configuration Settings" of
the master station connected?
Action
• 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 CC-
Link IE TSN Class A remote station.
• 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.
Disconnect the switching hub.
Disconnect the device not supporting ring topology, and connect
a device supporting ring topology.
Ensure that the communication speed of the master station and
the communication speed of slave station match.
Disconnect the device not set in "Network Configuration Settings"
of the master station.
Set "Cyclic Transmission Time" to a value obtained by the
following formula: Minimum value of cyclic transmission time +
Greatest value among the two values shown below.
• 10% of the calculated minimum cyclic transmission time
• When the communication speed of the master station is set to
1Gbps: Number of slave stations  2s
• When the communication speed of the master station is set to
100Mbps: Number of slave stations  20s
Ensure that the external device will not send a frame before data
link establishment of all stations, then reset the master station.
• Restrict the number of the connected stations so that the cyclic
data size of the devices with communication speed of
100Mbps does not exceed 2K bytes in total.
• Connect the device with communication speed of 100Mbps to
the master station.
• Update the firmware version of the master station to "15" or
later.
• Set the value set for "Communication Period Interval Setting"
and "Cyclic Transmission Time" in "Communication Period
Setting" under "Basic Settings" to greater than or equal to the
calculation value of the calculation formula. ( Page 293
Communication cycle intervals)
• Perform transient transmission again.
• When using a dedicated instruction, correct the number of
resends or the monitoring time. ( Page 71 Precautions)
• Power on the system, and then start transient transmission
after a while.
• When "Dynamic Routing" is set to "Disable" for the stations on
the communication path, change the settings to "Enable".
If relay stations which do not support dynamic routing exist, set
"Routing Setting" in "CPU parameter" to all stations on the
communication path.