Omron SYSMAC CJ1W-SCU21-V1, Operation Manual

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Troubleshooting Section 11-3
Board --- --- Bit A42404 (Inner Board ser-
vice failure) in the Auxiliary
Area is ON during execution
of the RXD(235) instruction. The serial commu-
nications mode is
not set correctly.
Or
A no-protocol
instruction was
sent using no-pro-
tocol mode to a
Board that does
not support no-pro-
tocol communica-
tions (pre-Ver.1.2).
Set bits 08 to 11 of
DM Area word m/
m+10 (serial com-
munications mode)
to 3 hex (no-proto-
col mode).
Or
Install a Board with
Unit Ver. 1.2 or
later that supports
no-protocol com-
munications, and
after replacing, set
the serial commu-
nications mode to
no-protocol mode.
Unit: Proto-
col macro
mode, NT
Link, loop-
back test --- --- During exe-
cution of the
RXDU(255)
instruction FINS end
code such as
0401 hex
(undefined
command) is
returned. The serial commu-
nications mode is
not set correctly.
Or
A no-protocol
instruction was
sent using no-pro-
tocol mode to a
Board that does
not support no-pro-
tocol communica-
tions (pre-Ver.1.2).
Set bits 08 to 11 of
DM Area word m/
m+10 (serial com-
munications mode)
to 3 hex (no-proto-
col mode).
Or
Install a Board with
Unit Ver. 1.2 or
later that supports
no-protocol com-
munications, and
after replacing, set
the serial commu-
nications mode to
no-protocol mode.
Unit: Host
Link FINS end
code such as
0205 hex
(response
timeout) is
returned.
Error conditions Words allocated in CIO
Area
Cause Remedy
Serial communi-
cations mode
Indicator
display
Status and
other condi-
tions