100
10 TROUBLESHOOTING
10.4 Troubleshooting of Bridge Module
When the ALM LED of the bridge module is turned on
When the L RUN LED of the bridge module is not turned on
When the L ERR. LED of the bridge module is flashing regularly
When the L ERR. LED of the bridge module is flashing irregularly
When the L ERR. LED of the bridge module is turned on
Item
Action
Check that the transmission cables (DP, DN) are not disconnected.
• Check that the transmission cables (DP, DN) (entire cables) are free from
disconnection.
• Check that the cables have been crimped with proper pin layout using link
connectors appropriate to the wire diameter.
Check the wiring of terminal blocks.
• Check that the transmission cables (DP, DN) and power cables (24V, 0V) are
properly connected to the terminal block of the bridge module.
• Check that there is no incorrect wiring and screws are tightened within the
specified torque range.
Perform the automatic address detection.
When creating a new system, adding or removing a slave module, or changing the
address of the slave module, perform the automatic address detection.
After performing the automatic address detection, check that the number of slave
modules and the address are consistent with those of the actual system.
Check the existence of the slave module.
If the LINK LED of the slave module is not flashing, check whether there is a
disconnection, short circuit, incorrect wiring, or poor contact in the transmission
cables (DP, DN) around the module.
Item
Action
Check that the L RUN LED is off.
Communications are interrupted.
For details, refer to the user's manual for the master module used.
Item
Action
Check that the station number setting switch is changed during normal
operation.
Correct the setting of station number setting switch after powering off the bridge
module, and power on the module again.
Check that the station number setting switch is not in failure.
Hardware failure may have occurred when the L ERR. LED is flashing although
station number setting switch has not been changed. Please consult your local
Mitsubishi representative.
Item
Action
Check that the bridge module or CC-Link dedicated cable has been
affected by noise.
Ground both ends of the shield wire of the CC-Link dedicated cable with a ground
resistance of 100 ohms or less via the SLD and FG of the bridge modules.
Ground the FG terminal of the bridge module properly.
When conducting piping and wiring, ground the pipes properly.
Check that communication is not disconnected.
The station number setting switch may have been changed while communication is
disconnected.
In this case, refer to all the check items in "When the L ERR. LED of the bridge
module is flashing regularly" and take appropriate actions.
Page 100 When the L ERR. LED of the bridge module is flashing regularly
The bridge module is not
connected at the end of CC-Link
system.
Check that SW4 is on.
Set SW4 to off.
Check that terminating resistor is
installed.
Remove the terminating resistor.
The bridge module is connected
at the end of CC-Link system.
Check that SW4 is on and
terminating resistor is installed.
• Remove the terminating resistor.
• Set SW4 to off.
Check that SW4 is off and
terminating resistor is installed.
Power off and on the bridge module after performing one of the following actions.
• Set SW4 to on.
• Install the terminating resistor.
Item
Action
Check that the station number setting of CC-Link is correct.
Set the correct station number.
Summary of Contents for AnyWire NZ2AW1C2AL
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