Omron KM1 User Manual page 83

0BChapter 4 Troubleshooting
When Phenomenon
The primary current of
the inverter cannot be
measured correctly.
The date and time of
the clock are initialized
to April 1, 2012 at
0:0:0.
Communication with
the unit connected
cannot be carried out.
When
used
Data backed up every
5 minutes or alarm
histories for CTD8E
(CT expansion) are
not saved.
Although
communication with
the unit connected can
be carried out, CONN
remains OFF.
4-6
Items to be checked Action to be taken
Check that the When the primary current of inverter is measured,
selected dedicated CT the crest value is several times larger than the
has some margin in effective value. Therefore, use a dedicated CT
the standard. having some margin in the standard.
Check whether the Set the clock all over again.
RTC backup period
has passed.
Check that the Use the specified connector.
specified connector
has been used.
Check that the settings Match the setting of the slave ID of the connected
of the connection unit with that of the connection configuration of the
configuration are measurement master.
correct.
Check that the power Power voltage can be applied from the
voltage has been measurement master to CT expansion slaves only.
applied to the Apply power voltage to the functional slave.
functional slave.
Check for errors in Connecting units to each other via the connector,
connections. match the setting of the slave ID with that of the
connection configuration of the measurement
master.
- Reset the entire system.
Reference page
A-7
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2-7
2-3
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