Omron SYSMAC CS1W-SCB41-V1 Operation Manual page 350

Troubleshooting
Transmission Successful but Response from Remote Device Not Received
Board/Unit Serial com-
status munications
mode
The con- The serial
verted communica-
command tions mode is
could be set to Serial
sent to the Gateway or
remote protocol
device but macro mode.
a normal
response is
not
received
from the
remote
device.
Error conditions
Indicator FINS end
display code sent to
FINS trans-
mission
source
The SD@ 0205 hex
and COM@ (response
indicators timeout), etc.
are flashing
but the RD@
does not
flash.
Cause
Words allo-
cated in CIO
Area
Bit 05 of CIO A Serial Gateway
word n+8/ response timeout
n+18 (Serial has occurred and
Gateway Send the response data
Start Time- cannot be
out/ Response received after the
Timeout) is timeout. Either of
ON. the following
causes is possible.
A remote device
that can receive
the command after
conversion does
not exist at the
specified FINS
destination
address.
The sent com-
mand frame is ille-
gal.
The communica-
tions conditions
and baud rate set-
tings for the serial
communications
path do not match
the settings at the
remote device.
Cable connec-
tions are incorrect
or faulty.
The RS-422A/485
port setting (2-wire
or 4-wire) is incor-
rect.
Adapters such as
the NT-AL001-E
are incorrectly
wired or terminat-
ing resistance is
not set correctly.
A command was
sent in a protocol
not understood by
the remote device.
A hardware error
has occurred in
the remote device.
Section 11-3
Remedy
Perform one of the fol-
lowing:
Check the device at the
specified FINS destina-
tion address.
Revise the command
frame to be converted.
Revise the settings in
the Setup Area and at
the remote device.
Review the wiring or
switch settings.
Turn ON the terminating
resistance switch at two
locations (remote device
or board) and turn OFF
the terminating resis-
tance switch at all other
nodes.
Check the command
specifications of the
remote device and the
source of command con-
version.
Replace the remote
device.
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