Omron SYSMAC CS1W-SCB41-V1 Operation Manual page 362

Troubleshooting
Error conditions
Serial communi- Indicator
cations mode display
The serial com- ---
munications
mode is set to no-
protocol mode.
Words allocated in CIO
Status and
other condi-
tions
With Serial The ER Flag (type of condi-
Communica- tion flag) is ON.
tions Units:
The
TXDU(256)
instruction
was sent, but
reception is
not being exe-
cuted.
The Communications Port
Error Flags A21900 to
A21907 are ON.
Cause
Area
The setting con-
tents indicated by
the operand in
the TXDU(256)
instruction is
incorrect.
The TXDU(256)/
RXDU(255)
instruction, or
SEND(090),
RECV(098),
CMND(490), or
PMCR(260)
instruction is
being executed
using the same
communications
port No.
FINS end code:
2201 hex (not
possible during
execution) was
returned. If the
TXDU(256)
instruction was
executed, the
operation is dis-
abled because
the port being
busy while
receiving.
FINS end code:
2202 hex (not
possible while
stopped) was
returned. Execu-
tion is not possi-
ble while the
protocol is being
switched using
the STUP(237)
instruction.
Section 11-3
Remedy
Review the con-
tents of the operand
for the TXDU(256)
instruction.
Either use a com-
munications port
other than that exe-
cuting the
TXDU(256),
RXDU(255),
SEND(090),
RECV(098),
CMND(490), or
PMCR(260)
instruction, or wait
until the required
port can be used
and execute the
instruction.
Insert an AND in
the input condition
for a NC condition
of the Communica-
tions TXDU(256)
Executing Flag
(n+9/n+19 bit 05).
Insert an AND in
the input condition
for a NC condition
of the Serial Com-
munications Unit's
Port Settings
Change Bits
(A62001 to
A63504).
333