Omron S8M - Page 45

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Basic Function Details Section 2-4
Overvoltage Alarm An overvoltage alarm value can be set between 20.0 and 28.8 V.
■ Operation
• When a voltage exceeding the alarm value is applied, the seven-segment
display will show error code A20 and the Alarm Output (ALM) will go OFF
within 100 ms.
• The error display and Alarm Output can be reset when the voltage has
been below the alarm value
−0.3 V for 500 ms or more.
Undervoltage Alarm An overvoltage alarm value can be set between 18.0 and 26.4 V.
■ Operation
• When a voltage below the alarm value is applied, the seven-segment dis-
play will show error code A21 and the Alarm Output (ALM) will go OFF
within 100 ms.
• The error display and Alarm Output can be reset when the voltage has
been above the alarm value +0.3 V for 500 ms or more.
Setting
range
Default
value
Operation Seven-
segment
display
Outputs Conditions
required to
reset
20.0 to
28.8 V
28.8 V When the voltage is
higher than the alarm
value continuously
for 80 ms or more,
the alarm is output
within 100 ms.
Alternately
displays
error code
A20 and the
voltage.
The Alarm
Output
(ALM) is
turned
OFF.
Voltage below
the alarm
value −0.3 V
continuously
for at least
500 ms.
V-O:
Overvoltage
alarm value
(V-O) −0.3 V
Power supply
voltage
Error display and
Alarm Output (ALM)
100 ms
500 ms
Reset possible
Setting
range
Default
value
Operation Seven-
segment
display
Outputs Conditions
required to
reset
18.0 to
26.4 V
20.0 V When the voltage is
lower than the alarm
value continuously for
80 ms or more, the
alarm is output within
100 ms.
Alternately
displays
error code
A21 and the
voltage.
The Alarm
Output
(ALM) is
turned OFF.
Voltage
above the
alarm value
+0.3 V contin-
uously for at
least 500 ms.