Diagnostic Function - Hitachi HIDIC EH-150 Applications Manual

10.2

Diagnostic function

This function is to check the communication circuit of EH-ETH module. Please set the dip switch as below
and initialize the EH-ETH. The self-diagnosis function will start. EH-ETH is initialized only when power on or
pressing reset button. Please note that the self-diagnosis will not start only by changing the dip switch. The
detail of self-diagnosis is shown in Table 10.2.1.
Internal loop back test
External loop back test
Send/receive test
Importance
When the diagnostic results in "abnormal", EH-ETH may be broken. In this case please contact our service department.
(1) Internal loop back test
[Outline] To check the internal circuit of EH-ETH
[Dip switch setting]
[Test procedure]
(a) Set the dip switch as above. Disconnect communication cable.
(b) Turn on the power to PLC or press the reset button.
[Test time] Approximate 70 seconds
[Result] See table 10.2.2.
I.ERR
Solid Green
Table 10.2. Self diagnosis setting
Name of diagnostic
function
Only Bit8 ON
1 2 3 4 5
ON
Table 10.2.2 Result of internal loop back test
STATUS ERR
Turn-off
Green,
flickering
Solid Green One time passed
Solid Green Solid Green Passed
Turn-off Solid Red
10-8
Setting of dip switch
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
6 7 8
Status or the diagnosis result
On testing
Failure
Chapter 10 Troubleshooting