Mitsubishi Electric L26CPU-BT User Manual page 349

Description
Check item
of problem
A1-8 Noise
Unable to link
the entire
system.
Master station
A1-9
failure
A2-1 Station No.
Transmission
A2-2
speed
Online status
A2-3
(device station)
Some station(s)
cannot be linked.
Parameter
A2-4
setting
Check contents
Check if the transmission cable
and power wiring are separated
enough.
Is there any noise on the
transmission cable? Check if the FG is separated
from the power system GND.
Reduce the transmission
speed and then check the
occurrence frequency.
Check if the system operates
Is the master station failed? properly after replacing the
master station.
Is the station number Check the station number
setting at the faulty station setting at the corresponding
correct? station.
Is the transmission speed Check the setting of the
at the faulty station transmission speed at the
correct? corresponding station.
Is the CC-Link interface at
Check the status of the faulty
the faulty station in the
station.
online status?
Check the contents of the
network parameters for the
• Are the network
programmable controller CPU
parameters (such as unit
of the master station.
number or station
information) correct?
Check SW0068, SW0069,
• Is some error occurring
SW0070, SW0071, SW0072,
at the master station?
SW0074 to SW0077, SW0098
• Network parameter of
to SW009B, SW009C to
the GX Works2
SW009F, and SW0144 to
SW0147.
Is the setting correct? Check if any value is set to the
(Automatic CC-Link intelligent function module
startup) switch setting.
CHAPTER 15 TROUBLESHOOTING
Check procedure Corrective action
Wire the transmission
cable and power wiring as
separated as possible.
(recommended to keep a
distance of more than
100mm)
Set FG and the power
system GND apart.
Execute the protection
against noise.
Reduce the transmission
speed.
Fix or replace the master
station.
Set the station number
properly.
Correct the transmission
speed.
Set the online status.
Set the network parameter
properly.
Execute the memory
format of the
programmable controller
CPU and then write the
network parameter.
Disable the intelligent
function module switch
settings in GX Works2.
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