Hitachi EH-150 - 9.3.1 ERR Confirmation by LED Indication

Chapter 9 Maintenance, check, error
9.3 Error LED and measure
Following table shows the indication and the measure in case an error occurs in communication between
EH-ETH2 and other station.
9.3.1 ERR confirmation by LED indication
The LED indications on the module give you information about your network and the module.
Table 9.3 LED indication and Error content
LED
No. Error content
Name Status
Cause of error and measurement
1 A fault of hardware WDE ON Supply the power or reset by Reset switch to restart.
2 Check sum error of
Communication
Parameters.
WDE
IER
ON Correct the setting of Communication Parameters.
3 Setting of Communication
Parameters is wrong.
IER ON Correct the setting of Communication Parameters.
4 Wrong cable Tx1 / Rx1
LINK LED
(of Ethernet
connector)
OFF (1) Wrong kind of cable
Check if the using cable is straight or cross type.
(2) Wrong connection of cable
Check if the cable is plugged in a connector firmly.
Check if it is not breaking wire.
5 Connection opening error
(active open station)
(*1)
(1) The requested station is not in network.
- Check if the station is in the same network.
- Check the cables for both own and the other station.
(2) Wrong setting at the own station
- Check if the IP address and logical port number at
the own station.
(3) Wrong setting at the other station
- Check if the other station is in passive open.
6 Error at data sending Before the current transmission completed, EH-ETH2
is requested next transmission.
- Configure the cyclic transmission period to be
longer.
- Configure the data size for sending to be smaller.
7 Error at data receiving
ERR
STS
ON
Blinking
Before the current communication completed,
EH-ETH2 receives next data.
- Configure the transmission period of the other station
to be longer.
- Configure the data size for receiving to be smaller.
*1: A connection specified passive station does not detect the abnormality below a data link level layer.
Therefore, the other station should have detection of error when the connection specified passive station
is not open.
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