Mitsubishi LJ61BT11 User Manual page 336

Description of problem
D1-1
Unable to read/write
cyclic data
D1-2
Unable to read/write
D2-1
word data
Unable to read/write
the lower area of the D3-1
cyclic data.
Unable to RY-output. D4-1
Unable to turn the
remote device station D5-1
to Ready (Xn1B: ON).
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(2) Problems on abnormal cyclic data of a remote device station
Check item
Is the automatic refresh set
properly?
(RX, RY, RWw, RWr, SB, SW)
Refresh data area
Is the access to buffer memory
correct?
(RX, RY, RWw, RWr, SB, SW)
Is there any fault in the reserved
Parameter setting
station setting?
Is there any fault in the
Parameter setting
consistency with the parameter?
Is there any fault in the
Parameter setting
consistency with the parameter?
Is the refresh instruction
Refresh instruction
(SB0003) executed?
Is the initial setting (Xn18)
completed?
Is the remote device station
Initial setting
initialize procedure registration
completed normally?
Is there any fault in the remote
device station initial setting?
Check contents
Is not the area overlapped with
the program or device used at
other network?
Check if there is no overlapping
with devices used in the program
or in other networks.
Check if the reserved station is
not set or the corresponding
station bits (SW0074 to SW0077)
are not set to "1".
Check if any remote I/O station is
installed to the corresponding
station number.
Check if any device, which
number of occupied stations is
small, is installed to the
corresponding station number.
Check if the refresh instruction
(SB0003) is turned on.
Check if the initial data
processing request (Xn18) is
turned off.
Check if the remote device station
initialize procedure registration
(SB000D) is turned on.
Check the result of the remote
device station initialize procedure
registration instruction.
Check the parameter.
Check the program.
15 TROUBLESHOOTING
Check procedure
Set so as not to overlap with
devices used in the program or in
other networks.
Access the corresponding station
address.
Set so as not to overlap with the
device used in the program.
Release the reserved station
setting.
Combine the parameter and the
installed model.
Combine the number of occupied
stations of the parameter and
installed model.
Turn on the refresh instruction
(SB0003).
Execute the initial data
processing.
Review the remote device station
initialize procedure registration.
Set the remote device station
initial setting properly.
Corrective action
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