Omron SYSMAC CS1W-SCB41-V1 Operation Manual page 355

Troubleshooting
Error conditions
Serial communi- Indicator
cations mode display
Board ---
Unit: Proto- ---
col macro
mode, NT
Link, loop-
back test
Unit: Host
Link
326
Words allocated in CIO
Status and
other condi-
tions
--- Bit A42404 (Inner Board ser-
vice failure) in the Auxiliary
Area is ON during execution
of the RXD(235) instruction.
--- During exe-
cution of the
RXDU(255)
instruction
Cause
Area
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).
FINS end The serial commu-
code such as nications mode is
0401 hex not set correctly.
(undefined
Or
command) is
A no-protocol
returned.
instruction was
FINS end
sent using no-pro-
code such as
tocol mode to a
0205 hex
Board that does
(response
not support no-pro-
timeout) is
tocol communica-
returned.
tions (pre-Ver.1.2).
Section 11-3
Remedy
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.
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.