Mitsubishi Electric MELSEC-Q Series User Manual page 288

(3) Problems due to cyclic data error in an intelligent device station (local station)
Problem Check item
Refresh data
E1-1
area
Cyclic data
cannot be
read/written.
Parameter
E1-2
setting
Word data
Parameter
cannot be E2-1
setting
read/written.
Cyclic data
(lower area) Parameter
E3-1
cannot be setting
read/written.
Data cannot be
Refresh
output from E4-1
instruction
RY.
286
Description
Has the auto refresh been
correctly set (RX, RY, RWw,
RWr, SB, and SW)?
Is the accessed buffer
memory area correct (RX,
RY, RWw, RWr, SB, and
SW)?
Isn't a station to which
reading/writing cannot be
performed specified as a
reserved station?
Do the parameter settings
match with the status of the
connected modules?
Do the parameter settings
match with the status of the
connected modules?
Is Refresh instruction when
changing parameters by the
dedicated instruction
(SB0003) on?
Check method
Check if no device overlaps
with ones used in programs
or in other networks.
Check if no device in the
master station overlaps with
ones used in programs or in
other networks.
Check if no device in the
local station overlaps with
ones used in programs or in
other networks.
Check if the bit
corresponding to the faulty
station is not "1" in Reserved
station specified status
(SW0074 to SW0077).
Check if a remote I/O station
is not connected to the
corresponding station.
Check if a module with the
small number of occupied
stations is not connected to
the corresponding station.
Check if Refresh instruction
when changing parameters
by the dedicated instruction
(SB0003) is on.
Corrective action
Set the devices so that they
do not overlap with ones
used in programs and in
other networks.
Access the correct buffer
memory area in the master
station.
Set the devices so that they
do not overlap with ones
used in programs.
Access the correct buffer
memory area in the local
station.
Set the devices so that they
do not overlap with ones
used in programs.
Cancel the reserved station
setting.
Match the model set by the
parameter with that of the
connected module.
Match the number of
occupied stations set by the
parameter with that of the
connected module.
Turn on Refresh instruction
when changing parameters
by the dedicated instruction
(SB0003).