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9-5
9 Troubleshooting and Maintenance
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
9-3 T
rou
b
lesho
o
ting
9
9-3-1 Ser
ial Gat
e
w
a
y (Ser
ia
l Gate
w
a
y or Protocol Macro
Mode)
z
Conversion Successful but Transmission Failed
Error conditions Cause Remedy
Unit status Serial
communica-
tions mode
Indicator
display
Command end
code sent to
command
source
Confirmation of
device variable
for CJ-series
Unit, etc.
The Unit con-
verted the
received (via
CPU bus)
command, but
could not send
the command
to the remote
device after
conversion. Serial commu-
nications
mode is set to
Protocol
Macro Mode. The SD @ indi-
cators do not
flash at all.
0204 hex
(Remote node
busy) *_P1(orP2)_Time
outErr (Timeout
Error) is set to
TRUE. A Serial Gateway
send start timeout
occurred.
(The converted
command will be
discarded without
being sent).
The command
was received by
the Unit, but the
step transition in
the communica-
tions sequence of
the protocol
macro is sus-
pended for either
of the following
reasons.
• The next step is
a Receive com-
mand.
• The Wait com-
mand is being
executed.
Correct the communica-
tions sequence.
Alternatively, adjust
*_P1(orP2)_PmrSgwSendT
imeoutCfg (Serial Gateway
Send Start Timeout Moni-
toring Time), as required.
2607 hex
(transmission
command error
(no right to exe-
cute service)) *_P1(orP2)_Pmr
SgwProhSta
(Serial Gateway
Prohibited Flag
(Protocol Mac-
ros)) is TRUE
(Prohibited sta-
tus). The Serial Gate-
way is prohibited. Change
*_P1(orP2)_SgwDsblCmd
(Serial Gateway Prohibit
Switch (Protocol Macros))
to FALSE.
0205 hex
(response time-
out), etc. *_P1(orP2)_HlkC
TSCtlCfg (CTS
Control) is TRUE
but
*_P1(orP2)_SigC
SSta(CS signal)
is FALSE. CTS control is set
to TRUE(Yes) but
the RTS (RS) sig-
nal from the
remote device
was not input to
the CTS (CS) sig-
nal of the Local
Unit. Perform either of the follow-
ing:
Loop the RTS (RS)-CTS
(CS) signals of the Local
Unit.
Disable CTS control.
Input the RTS (RS) signal
from the Remote Unit to the
CTS (CS) signal of the
Local Unit and use CTS
control.