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Seven-segment Error Codes Section 8-2
• When two or more errors occur simultaneously, the higher priority error
(higher in the table above) will be displayed.
• The A11 and A22 errors may occur simultaneously in two or more branch
outputs. In this case, the corresponding branch output indicators will not
be lit.
e10 E10 Data other than com-
munications data is
corrupted.
There is an error in the parameter
settings.
Press the Mode Key to switch to
the parameter initialization dis-
play. After initializing the parame-
ters, set them again.
a10 A10 Abnormal voltage trip-
ping
The power supply voltage
exceeded 28.8 V.
Check the power supply voltage.
a11 A11 Abnormal current trip-
ping
The branch output's current
exceeded the current tripping
value.
Check whether the connected
device is correct and check
whether the set value is appropri-
ate.
a20 A20 Overvoltage alarm The input voltage exceeded the
overvoltage alarm value.
Check the power supply voltage
and the set value.
a21 A21 Undervoltage alarm The input voltage dropped below
the undervoltage alarm value.
a22 A22 Overcurrent alarm The branch output's current
exceeded the overcurrent alarm
value.
Check whether an excessive load
is connected and check whether
the set value is appropriate.
a23 A23 Run time alarm The run time exceeded the run
time value.
Reset the run time. If the run time
alarm is not needed, set the
alarm value to 0.0.
a30 A30 Over-temperature out-
put
The S8M's internal temperature
exceeded the over-temperature
output value.
Check for a high ambient temper-
ature and check the setting of the
over-temperature output value.
Take steps to reduce the temper-
ature in the control panel.
Seven-segment
display
Error
code
Meaning Probable cause and remedy
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