Omron CJ1W-SCU32 Operation Manual page 284

9 Troubleshooting and Maintenance
Transmission Successful but Response from Remote Device Not Received
Unit status Serial
communica-
tions mode
The converted The serial
command communica-
could be sent tions mode is
to the remote set to Serial
device but a Gateway or
normal Protocol Macro
response is not Mode.
received from
the remote
device.
9-6
Error conditions
Indicator Command
display end code sent
to command
source
The SD@ indi- 0205 hex
cators flash (response tim-
but the RD@ eout).
does not
flash.
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Cause
Confirmation
of device
variable for
CJ-series Unit,
etc.
*_P1(orP2)_Ti A Serial Gateway
meoutErr (Tim- response timeout
eout Error) is occurred and you
set to TRUE. cannot receive the
response data after
the timeout. Either
of the following
causes is possible.
A remote device
that can receive
the command
after conversion
does not exist at
the specified
command desti-
nation address.
The sent com-
mand frame is
illegal.
The communica-
tions conditions
and baud rate
settings for the
serial communi-
cations path do
not match the
settings at the
remote device.
Cable connec-
tions are incor-
rect or faulty.
The terminating
resistance switch
setting is not cor-
rect for RS-
422A/485 port.
Adapters such as
the NT-AL001
are incorrectly
wired or termi-
nating resis-
tance is not set
correctly.
A command was
sent in a protocol
not understood
by the remote
device.
A hardware error
occurred in the
remote device.
Remedy
Perform the following reme-
dies.
Check the device at the
specified command desti-
nation address.
Revise the command
frame to be converted.
Revise the system settings
and at the remote device.
• Check the wiring.
• Turn ON the terminating
resistance switch at two
end locations (remote
device or Unit) and turn
OFF the terminating
resistance switch of all
other Units.
Check the command speci-
fications of the remote
device and the source of
command conversion.
Replace the remote device.