Specifications

5 - 10
1) LED displays
No. Name LED
status
Description
1 RUN Green on Module operating normally
Off WDT error occurred (hardware error)
2 REM. Green on Module operating normally
Green
flash
Parameters being written to flash ROM or device is in test mode.
Off In remote initialization, an error (WDT error, blown fuse error, input/output
verification error, etc.) occurred.
3 T.PASS Green on Executing the baton pass (being joined in a network)
Green
flash
The test is determined to have completed normally when this LED flashes 20
times (approximately 10s) during the test.
Off Baton pass not yet executed (the host is disconnected from the network)
4 D.LINK Green on Data link being executed (cyclic transmission is being executed)
Off Data link not yet executed (parameter receiving not completed, host CPU
error, data link stop instructed, etc.)
5 SD Green on Data being sent
Off Data not yet sent
6 RD Green on Data being received
Off Data not yet received
Red on • Station setting error (other than 1 to 64), Mode setting error (prohibited
setting), Operation condition setting error due to parameters.
• A station with the same number already exists in the network.
• The host is designated as a remote master station in spite of a remote
master station already existing in the network.
• Error in parameters received from the remote master station.
Flash An error was detected while testing the network module.
7 ERR.
Off Normal status
8 L ERR. Red on A communication error occurred. (One of the following communication errors
has occurred):
CRC : Error generated by a faulty cable, noises, etc.
OVER : This error occurs when the next data is received before the last
receive data is loaded into the module, and the data is
overwritten. It is caused by a hardware error in the receive area of
the network module.
AB.IF : This error occurs when more than the specified number of bits
are set to "1" among the receive data in the frame, or when the
receive data is shorter than the specified data length.
TIME : This error occurs when a baton pass was not handed to the host
within the monitoring time.
DATA : This error is caused when abnormal code data is received.
UNDER : This error occurs when the internal processing of the send data
was not executed at a fixed interval.
LOOP : This error occurs when the forward or reverse loop line is faulty
and the power to the adjacent station, which sends data to the
host station, is turned OFF or the cable connector is faulty.
<Corrective action> Check the cables and connectors. (Detached or
loosened connectors, wrong IN/OUT connections,
broken or damaged cables, improper cable routing,
etc.)
For details, refer to Section 8.1 Network Diagnostics.
Off No communication error