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Seven-segment Error Codes Section 7-2
7-2 Seven-segment Error Codes
Error Display List
• When two or more errors occur simultaneously, the higher priority error
(higher in the table above) will be displayed.
Seven-segment
display
Error
code
Meaning Probable cause and remedy
erp ERP Memory error on
power supply side
These are S8AS system errors.
When one of these error codes is displayed, check the system config-
uration and clear the error, and then turn the power supply OFF and
ON again.
If the error code persists, contact your OMRON representative
regarding the error.
. --- S8AS hardware error
alp ALP Power supply voltage
error
e98 E98 RAM error
e97 E97 EEPROM read error
e96 E96 EEPROM write error
e95 E95 Internal communica-
tions error
e94 E94 Short circuit failure
e00 E00 EEPROM initialization
error
e01 E01 EEPROM error
e02 E02 Model error
e03 E03 Factory default detec-
tion mode
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.
This error is treated as a system
error for the S8AS-24006N/
48008N.
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
threshold.
Check whether the connected
device is correct and check
whether the set value is appropri-
ate.
a12 A12 Total current tripping All branch outputs were cutoff
because the total current and the
power-ON time exceeded the
abnormal total current tripping
conditions.
Check whether the connected
devices are suitable and operat-
ing within the total current limit.
a21 A21 Undervoltage alarm The output voltage dropped
below the undervoltage detection
threshold.
Check the power supply voltage
and the set value.
a23 A23 Maintenance forecast
monitor output
The replacement time calculated
by the S8AS is lower than the
notification time.
Indicates that the replacement
time is approaching.
a23/hot A23/
HOT
Overheating alarm The S8AS is overheated Take steps to reduce the internal
temperature.
a30 A30 Over-temperature out-
put
The S8AS's internal temperature
exceeded the over-temperature
output threshold.
Check for a high ambient temper-
ature and check the setting of the
over-temperature output thresh-
old.
Take steps to reduce the temper-
ature in the control panel.
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