Mitsubishi Electric L26CPU-BT User Manual page 357

(3) Problems on abnormal cyclic data of an intelligent device station (local
station)
Description
Check item
of problem
Refresh data
E1-1
area
Unable to
read/write cyclic
data
Parameter
E1-2
setting
Unable to
Parameter
read/write word E2-1
setting
data
Unable to
read/write cyclic Parameter
E3-1
data at the low setting
order area.
Unable to RY- Refresh
E4-1
output. instruction
Check contents
Is the automatic refresh set
Check if there is no overlapping
properly?
with devices used in the
(RX, RY, RWw, RWr, SB,
program or in other networks.
SW)
Check if there is no overlapping
with devices used in the
program or in other networks,
Is the access to buffer
in the master station.
memory correct?
(RX, RY, RWw, RWr, SB,
SW)
Check if there is no overlapping
with devices used in the
program or in other networks,
in local stations.
Check if the reserved station is
Is there any fault in the not set or the corresponding
reserved station setting? station bits (SW0074 to
SW0077) are not set to "1".
Is there any fault in the Check if any remote I/O station
consistency with the is installed to the
parameter? corresponding station number.
Check if any device, which
Is there any fault in the
number of occupied stations is
consistency with the
small, is installed to the
parameter?
corresponding station number.
Is the refresh instruction Check if the refresh instruction
(SB0003) executed? (SB0003) is turned on.
CHAPTER 15 TROUBLESHOOTING
Check procedure Corrective action
Set so as not to overlap
with devices used in the
program or in other
networks.
Access the corresponding
address of the master
station.
Set so as not to overlap
with the device used in the
program.
Access the normal address
at the local station side.
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).
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