10 TROUBLESHOOTING
10.2 Checking the LEDs
107
10
When the D LINK LED flashes
When the D LINK LED flashes, check the following items.
Check item
Action
Does the IP address setting of the safety remote I/O module match
the IP address of the safety remote I/O module specified in the
network configuration settings of the master station?
Match the IP address of the safety remote I/O module with the IP address specified in
the network configuration settings of the master station or the CC-Link IE TSN
configuration settings.
Is the station type remote station?
In the network configuration settings of the master station, change "Station type" for
the safety remote I/O module to "Remote station".
Is the module set to a reserved station?
Change the setting of "Reserved/Error Invalid Station" to "No Setting" in the network
configuration settings of the master station.
Is the IP address of the safety remote I/O module duplicated with
other stations?
If two or more duplicate IP addresses exist, change the setting so that they are
different from each other.
In the network configuration settings of the master station, are the
third or fourth octets of the IP address duplicated with those of other
stations?
Set the IP address so that there is no duplication in the third and fourth octets of the IP
address for all the stations.
In the network configuration settings of the master station, does each
network address (the subnet mask part of IP address) match that of
the master station?
Set each IP address and subnet mask so that the network addresses of all the stations
are the same.
Is a station in which a communication error has occurred connected
between the master station and the safety remote I/O module?
A safety remote I/O module cannot establish data link if there is no path available with
which the safety remote I/O module can communicate with the master station without
relaying data via a station with a communication error. If a communication error has
occurred in two or more stations, clear the error one by one, starting from the station
closest to the master station on the communication path.
Has another station been reset or powered off?
Disconnection temporarily occurs due to reset or power-off of another station. Wait
until communication restarts.
Does a station on the network link up at the desired communication
speed?
Change the communication speed of another station or the switching hub to satisfy the
communication speed conditions.
Does the time synchronization source station operate normally?
• If an error occurs in the time synchronization source station, clear the error.
• When the time synchronization source station is reset or powered off, disconnection
temporarily occurs due to switching of time synchronization sources. Wait until
communication restarts.
Is a time synchronization source station with a higher priority newly
connected to the network?
Disconnection temporarily occurs due to switching of time synchronization sources.
Wait until communication restarts.
Does the master station connected to the network operate normally?
If an error occurs in the master station, clear the error in the master station.
Is the system configured with ring topology?
When the firmware version of the safety remote I/O module is "01", configure the
system with line topology, star topology, or mixture of star topology and line topology.
Does the model name of the slave station set in the network
configuration settings of the master station match the model name of
the actual device?
Change the network configuration settings so that the model name of the slave station
set in the network configuration settings of the master station matches the model
name of the actual device.
Or, in the network configuration settings, set the safety remote I/O module as a
general remote station.
Is a value out of the setting range set for the communication cycle
interval setting of the master station?
Set a value within the setting range for the communication cycle interval setting of the
master station. (
Page 54 Communication cycle interval setting)
Is "Network Synchronous Communication" of the safety remote I/O
module set to "Synchronous"?
Set "Network Synchronous Communication" of the safety remote I/O module to
"Asynchronous".
Are RX/RY with a number of points that cannot be handled by the
safety remote I/O module set?
Set 16 for the number of points for RX and RY in the network configuration setting.
Are RWr/RWw with a number of points that cannot be handled by the
safety remote I/O module set?
Set 16 or less for the number of points for RWr and RWw in the network configuration
setting.
Has any error occurred in the safety remote I/O module?
• Change the network configuration settings so that the model name of the slave
station set in the network configuration settings of the master station matches the
model name of the actual device.
• Power off and on the module power supply (24VDC).
When slave station parameter automatic setting is enabled, is slave
station parameter automatic setting completed with an error?
Check the slave station parameter automatic setting execution result details (SW0194)
and the event history of the master/local module, and take appropriate action
according to the stored error code.
Is the IP address setting switch incorrectly set to 0?
Set the IP address in the range of 1 to 254.
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