Omron SYSMAC CS1W-SCB41-V1 Operation Manual page 346

Troubleshooting
Serial commu- Indicator
nications status
mode
Host Link, The SD@ and
slave-initiated COM@ indica-
communica- tors are flash-
tions ing, but there is
no response
from the host.
Status
information,
etc.
A transmis- ---
sion error has
not been
detected at
the host.
---
---
---
CIO Area words n +
5/n + 15 (port set-
ting status in Setup
Area settings) do
not correspond with
the settings at the
host.
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 1-7 Comparison to Previous Products for details.
CIO Area Cause
A hardware error
has occurred in the
reception circuit.
Cables are incor-
rectly wired.
There is a hard-
ware error in the
reception circuit.
Adapters such as
the NT-AL001-E are
incorrectly wired or
set.
---
The communica-
tions conditions and
baud rate do not
match the settings
at the host.
Section 11-3
Remedy
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 wiring and cor-
rect.
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.
Reset the parameters in
the System Setup and at
the host correctly.
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