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317
Troubleshooting
Section 11-3
Note
The System Setup cannot be changed unless the power supply is cycled, the
Board or Unit is restarted, the port is restarted, or the STUP(237) instruction
is executed. Refer to
Comparison to Previous Products
for details.
Host Link,
slave-initiated
communica-
tions
The SD
@
and
COM
@
indica-
tors are flash-
ing, but there is
no response
from the host.
A transmis-
sion error has
not been
detected at
the host.
---
A hardware error
has occurred in the
reception circuit.
Conduct a loopback test in
serial communications
mode to check the trans-
mission lines. If an error
occurs during the test,
replace the Board or Unit.
---
Cables are incor-
rectly wired.
Check the wiring and cor-
rect.
---
There is a hard-
ware error in the
reception circuit.
Adapters such as
the NT-AL001-E are
incorrectly wired or
set.
Conduct a loopback test in
serial communications
mode to check the trans-
mission lines. If an error
occurs during the test,
replace the Board or Unit.
---
---
Check the program at the
host. When unsolicited
communications are used
with Host Link mode, there
must be a response
returned from the host for
every command sent from
the Board or Unit.
CIO Area words n +
5/n + 15 (port set-
ting status in Setup
Area settings) do
not correspond with
the settings at the
host.
The communica-
tions conditions and
baud rate do not
match the settings
at the host.
Reset the parameters in
the System Setup and at
the host correctly.
Serial commu-
nications
mode
Indicator
status
Status
information,
etc.
CIO Area
Cause
Remedy
Summary of Contents for SYSMAC CJ1W-SCU21-V1
Page 3: ...iv...
Page 5: ...vi...
Page 9: ...x...
Page 15: ...xvi...
Page 89: ...60 Basic Operating Procedure Section 1 9...
Page 151: ...122 RS 232C and RS 422A 485 Wiring Section 3 4...
Page 173: ...144 Host Link Function for Replacing Existing PLCs Section 4 6...
Page 223: ...194 Enhanced Protocol Macro Functions Section 5 6...
Page 277: ...248 Communications Frames Section 6 8...
Page 291: ...262 Basic Operating Procedure in No protocol Mode Section 7 4...
Page 301: ...272 Auxiliary Area and CIO Area Allocations Section 8 3...
Page 391: ...362 Introduction Appendix A...
Page 421: ...392 CompoWay F Master Protocol Appendix B...
Page 513: ...484 E5 K Digital Controller Read Protocol Appendix F...
Page 571: ...542 E5ZE Temperature Controller Write Protocol Appendix I...
Page 587: ...558 E5 J Temperature Controller Protocol Appendix J...
Page 627: ...598 ES100 Digital Controller Protocol Appendix K...
Page 661: ...632 V500 V520 Bar Code Reader Protocol Appendix M...
Page 697: ...668 3Z4L Laser Micrometer Protocol Appendix N...
Page 717: ...688 Visual Inspection System Protocol Appendix O...
Page 755: ...726 V600 V620 ID Controller Protocol Appendix P...
Page 763: ...734 Hayes Modem AT Command Protocol Appendix Q...
Page 767: ...738 Changing Communications Port Settings Using STUP 237 Appendix R...
Page 781: ...752 Revision History...