Mitsubishi Electric Q Series Reference Manual page 372

8 TROUBLESHOOTING
D
Value 3 : Abnormal
common parameters
Review the common
parameters and station
inherent parameters.
Value 2 : No common
parameters
Set the common
parameters.
Check SW004A.
Check the data linking stop
request station and the
designation method.
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(2) From monitoring the network status to troubleshooting of a faulty
station
The following flowchart illustrates the procedure for monitoring the status of the
entire network, detecting a faulty station, and then performing troubleshooting for
the applicable station.
The status of the entire network is monitored with GX Developer.
Start troubleshooting
Is only the
transient transmission
used?
No
(Execute the cyclic transmission)
Check the data link status of
the control station with
GX Developer's network
diagnostics.
Are all the
stations executing
data linking
normally?
No
Check the stations that are
not executing data linking.
Check the baton pass status
of the applicable station with
GX Developer's network
diagnostics.
Is the applicable
No station executing the baton
pass normally?
Yes
Is the applicable
station waiting
for parameter
communication?
(SB0054: On?)
No
Did a LINK
PARA ERROR occur
in the applicable
station's CPU?
No error
Value of SW0049?
Value 1:
Stop designated
Value 1 :
Value of SW0047?
Data linking
stopped
Value 2: Data linking stopped
Check SB0000 to 0003 and
SW0000 to 0004.
SW0047: Baton pass status (host)
SW0048: Cause of host baton pass interruption
SW0049: Cause of host data linking stop
SW0054: Parameter information
A
Yes
SW0055: Parameter setting status
C
Yes
Check with SB0070
and SW0070 to 0073
Yes
Error
Check that the network
Review the control station's
setting and the installation parameter settings.
position of the network
module match.
Conduct PC diagnostics.
Value 4: The
CPU of the
host is faulty.
Check the status of the
CPU of the host
Value 6:
Communication
stopped
Is the value of
the link monitoring time
No problem
parameter sufficient
for the system?
Problem
Try setting the link monitoring
time to the maximum value.
MELSEC-Q
Value: 0 Parameter
Value of SW0055?
not received
Value: F826
H
Check the mode setting,
Parameter mismatch
cable connection status,
SW0047 and SW0048.
Verify the network type of
the control station.
(Are the parameters for the
MELSECNET/H used
when the applicable station
is an AnU/QnA series
MELSECNET/10 station?)
B
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