Mitsubishi Melsec-L Series User Manual page 272

(2) Screen items
15 - 3
(a) SD WAIT
Indicates "Transmission wait status".
Value Status
0001(ON) Waiting for data
transmission
0000(OFF) Data
transmission
start
(b) SIO
Indicates "SIO error status".
Value Status
0001(ON) Overrun or
framing error
occurred.
OS area is full.
0000(OFF) Normal
Description
Data cannot be sent to the external device by the
transmission control of the C24 (waiting for data
transmission).
• The transmission cannot be started.
• A terminate transmission request (DC3 received/
DR(DSR) signal off) is received from the external
device during message transmission.
The transmission became available, and the data
transmission is started/resumed.
Description
Overrun or framing error occurred.
Keeps its on-status even after the communication
returns to normal. Initialize the error information as
necessary.
For details, refer to Section 15.1.2.
No free space is available in the OS area, and the
receive data was discarded.
Keeps its on-status even after the communication
returns to normal. Initialize the error information as
necessary.
For details, refer to Section 15.1.2.
15 TROUBLESHOOTING
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