Mitsubishi Electric NZ2GN2S1-16D User Manual page 198

When the DATA LINK LED turns off
When the DATA LINK LED turns off, check the following items.
Check item
Are Ethernet cables used compliant with the relevant standard?
Is the segment length 100m or less?
Does the cabling condition (bending radius) meet the specifications?
Is any Ethernet cable disconnected?
Do other stations connected to the I/O module normally operate?
Does the switching hub in use normally operate?
Does the master station connected to the network operate normally?
Is another station that is powered off or in the middle of remote reset
connected between the master station and the I/O module?
Does another station between the master station and the I/O module
link up at the desired communication speed?
Is the IP address of the I/O module duplicated with any of other
devices within the access range of CC-Link IE TSN?
Is function setting switch 1 turned off?
Is a device that is operating as a network other than CC-Link IE TSN
connected between the master station and the I/O module?
When the DATA LINK LED flashes
When the DATA LINK LED flashes, check the following items.
Check item
Is the station type remote station?
Is the I/O module a reserved station?
Is the IP address of the I/O module duplicated with that of other
station?
In the network configuration settings of the master station, is the third
or fourth octet of IP address duplicated with that of other station?
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?
Is another station in which a communication error has occurred
connected between the master station and the I/O module?
Has another station been reset or powered off?
Does another station on the network link up at the desired
communication speed?
Does the time synchronization source station operate normally?
Is a time synchronization source station with a higher priority newly
connected to the network?
11 TROUBLESHOOTING
196
11.2 Checking the LEDs
Action
Replace the cable with an Ethernet cable compliant with the relevant standard. (
User's manual for the master station used)
Change the segment length to 100m or less.
Refer to the manual for the Ethernet cable used, and correct the bending radius.
Replace the Ethernet cable.
Check that the power supplies of the other stations are turned on.
• Check that the power supply of the switching hub is turned on.
• Check that the switching hub compliant with the specifications of the master module
in use is used. ( User's manual for the master station used)
• Disconnect Ethernet cables, and then reconnect them.
• Power off and on the switching hub.
If an error occurs in the master station, clear the error in the master station.
• Check that the master station in use is supported. ( Page 111 Applicable master
station)
• Power on the I/O module(s) that is off because an I/O module becomes
disconnected when it is off.
• The I/O module becomes disconnected during remote reset. Avoid unnecessary
remote reset.
Change the communication speed of another station or the switching hub to satisfy the
communication speed.
Change the IP address so that no IP address duplication occurs in the access range of
CC-Link IE TSN.
Turn off function setting switch 1 if it is turned on, and turn off and on the module
power supply.
Disconnect a device that is not operating as CC-Link IE TSN from the system.
For a device that can be set to operate on CC-Link IE TSN, make sure that it is
operating as CC-Link IE TSN.
Action
In the network configuration settings of the master station, change "Station type" for
the I/O module to "Remote station".
Change the setting of "Reserved/error invalid station" to a value other than "Reserved
station" in the network configuration settings of the master station.
If two or more duplicate IP addresses exist, change the setting so that they are
different from each other.
Configure the setting so that there is no duplication in the third and fourth octet of IP
address for all the stations.
Set each IP address and subnet mask so that the network addresses of all the stations
are the same.
An I/O module cannot establish data link if there is no path available with which the 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.
Disconnection temporarily occurs due to reset or power-off of another station. Wait
until communication restarts.
Change the communication speed of another station or the switching hub to satisfy the
communication speed.
• 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.
Disconnection temporarily occurs due to switching of time synchronization sources.
Wait until communication restarts.