Mitsubishi Electric MELSEC iQ-R Series User Manual page 117

Intelligent device station (local station)
Problem Check item
Cyclic data E1-1 Refresh data
cannot be read/ area
written.
E1-2 Parameter
setting
Word data E2-1 Parameter
cannot be read/ setting
written.
Cyclic data E3-1 Parameter
(lower area) setting
cannot be read/
written.
Data cannot be E4-1 Refresh
output from RY. instruction
Description
Has the link refresh been correctly
set? (RX, RY, RWw, RWr, SB,
SW)
Is the buffer memory area
accessed correctly? (RX, RY,
RWw, RWr, SB, SW)
Is any of refresh devices (RX, RY,
RWw, RWr) of the module
parameters set for the redundant
system?
Is 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 the refresh instruction executed
after changing parameters by the
dedicated instruction?
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 any of refresh devices
(RX, RY, RWw, RWr) is set by
mistake for the redundant system.
Check if the bit corresponding to
the faulty station is not "1" in
'Reserved station specification
status' (SW0074 to SW0077).
Check if a remote I/O station is
connected to the corresponding
station number.
Check if a module with the small
number of occupied stations is not
connected to the corresponding
station number.
Check if 'Refresh instruction when
changing parameters by the
dedicated instruction' (SB0003) is
turned on.
4 TROUBLESHOOTING
4.5 Troubleshooting by Symptom
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.
• Avoid any refresh devices (RX,
RY, RWw, RWr) setting for the
redundant system.
• Use program (Un\G) to make
a refresh.
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).
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