Omron CJ1W-SCU32 Operation Manual page 296

9 Troubleshooting and Maintenance
Error conditions
Serial Indicator
communica- display
tions mode
Serial com- The
munications SD@/RD@
mode is set to indicators
protocol flash, but the
macro. Unit cannot
perform com-
munications.
The
SD@/RD@
indicators
flash, but the
Unit cannot
perform com-
munications
or a communi-
cations error
sometimes
occurs.
Note 1 The System Settings can not be changed unless the power supply is cycled, the Unit is restarted, or the
port is restarted. Refer to 1-8 Basic Operating Procedure for details.
2 For details on the protocol macros, refer to the CX-Protocol Ver.1.9 OPERATION MANUAL (Cat. No.
W344).
9-18
Status Confirmation of
information, etc. device variable for
CJ-series Unit, etc.
*_P1(orP2)_PmrS The sequence is
eqAbtSta aborted (the step is
(Sequence Abort interrupted).
Completion Flag)
is set to TRUE.
*_P1(orP2)_PmrE The sequence is run-
xecSta (Protocol ning and does not end
Macro Executing (in receive status).
Flag) remains ON
when the Exec
PMCR instruc-
tion is executed
without setting the
monitoring time in
sequence units.
Send data was The contents of
transmitted, but *_P1(orP2)_SysSetSta
there is no (System Settings) do
response from the not match those of the
Remote Unit. Remote Unit.
• *_P1(orP2)_TransErr
(Transmission error)
is set to TRUE.
• The error for any of
the
P1(orP2)_TransErrSt
a bits 0 to 14 is set to
TRUE.
---
A transmission • *_P1(orP2)_TransErr
error occurs. Sta (Transmission
Error Status) is set to
TRUE.
• The error for any of
bits 0 to 14 is set to
TRUE.
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Cause
Protocol macro data is not
Use CX-Protocol transmis-
set correctly. sion line trace to check
whether the protocol data
The system settings such as
and System Settings are
the baud rate and frame for-
correct.
mat differ from those of the
Remote Unit.
The baud rate is outside the Review the System Set-
allowable range, or there tings.
are bit errors due to mis-
Review the Remote Unit
matched stop bits and so
settings and the program
on.
(including the baud rate,
frame format, and so on).
The wiring is faulty. Check the wiring.
The setting of the 2/4-wire Set the terminating resis-
switch for the RS-422A/485 tance switch of the Unit and
port does not match the remote unit at the end to
actual wiring. ON. Set the terminating
resistance of other units to
The wiring of adapters such
OFF.
as the NT-AL001 is faulty.
This is a hardware error. Set bits 08 to 11 (Serial
communications mode) of
*_P1(orP2)_PortCfg to F
hex (Loopback Test), con-
nect the connector wired for
a loopback test, then set
*_P1(orP2)_LbtTestTrigCmd
to TRUE to conduct a loop-
back test.
The test data is reflected in
*_P1(orP2)_PmrSta.
If an error occurs during the
test, replace the Unit.
(The loopback test result is
also reflected in
*_P1(orP2)_LbtSta.)
The system settings such as Review the system settings.
the baud rate and frame for-
Review the Remote Unit
mat differ from those of the
settings and the program
Remote Unit. The baud rate
(including the baud rate,
is outside the allowable
frame format, and so on).
range, or there are bit errors
due to mismatched stop bits
and so on.
Remedy