Mitsubishi L26CPU-BT, User Manual

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15 - 14 15 - 14
15 TROUBLESHOOTING
15.2.2 When cyclic data are faulty
(1) Problems on abnormal cyclic data of a remote I/O station
Description of problem Check item Check contents Check procedure Corrective action
Check if the automatic refresh
setting range is correct. Set the automatic refresh
parameter properly.
Is the automatic refresh set
properly?
(RX, RY, SB, SW)
Check if there is no overlapping
with devices used in the program
or in other networks.
32 points (fixed) per station, also
for 8 or 16 points I/O modules.
(except for the point setting of the
remote I/O station)
Set so as not to overlap the
refresh device with devices used
in the program or in other
networks.
Are the refresh by the automatic
refresh parameter setting and the
refresh by the FROM/TO
instruction executed
simultaneously?
Check the program.
Check the automatic refresh
parameter setting.
Execute either one of the refresh
by the automatic refresh
parameter setting or the refresh
by the FROM/TO instruction.
C1-1 Refresh data area
Is the correct address of the
buffer memory being
read/written? (RX, RY, SB, SW)
Check the program.
32 points (fixed) per station, also
for 8 or 16 points I/O modules.
(except for the point setting of the
remote I/O station)
Access the corresponding
address.
Set so as not to overlap the
refresh device with devices used
in the program or in other
networks.
Unable to read/write
cyclic data
C1-2 Parameter setting
Is there any fault in the reserved
station setting?
Check if the corresponding
station bit, which is not
read/written at the reserved
station specified status (SW0074
to SW0077), is not "1".
Release the reserved station
setting.
Unable to RY-output. C2-1 Refresh instruction
Is the refresh instruction
(SB0003) executed? Check if the refresh instruction
(SB0003) is turned on. Turn on the refresh instruction
(SB0003).