Omron S8M - Page 43

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Basic Function Details Section 2-4
value is not necessarily an accurate measure of the peak inrush current of the
connected device.
Overcurrent Alarm
Function
Each branch output's current tripping value can be set between 0.5 and 4.0 A
(0.5 to 3.8 A in the S8M-CP04-RS) in 0.1 A units. In addition, the overcurrent
alarm type can be set to standard detection or instantaneous detection.
■ Operation
• The Alarm Output (ALM) will be turned OFF if the branch output's current
exceeds the alarm value continuously for 80 ms or more (standard detec-
tion) or 10 ms (instantaneous detection).
• In this case, the seven-segment display will alternately display the error
code (A22) and present current.
• The error display and Alarm Output can be cleared when the current has
been below the alarm value continuously for 500 ms or more.
Setting
range
Default
value
Alarm
type
Operation Error code and
alarm output
Conditions
required to
reset
0.5 to
4.0 A
(0.5 to
3.8 A in
the
S8M-
CP04-
RS)
4.0 A
(3.8 A
in the
S8M-
CP04-
RS)
Standard When the cur-
rent is higher
than the set
value continu-
ously for 80 ms
or more, the
alarm is output
within 100 ms.
The error code
(A22) and cur-
rent are dis-
played
alternately on
the seven-seg-
ment display
and the Alarm
Output (ALM) is
turned OFF.
The Reset Key
can be used to
reset the alarm
once the cur-
rent is 0.3 A or
more below the
set value.
Instanta-
neous
When the cur-
rent is higher
than the set
value continu-
ously for 10 ms
or more, the
alarm is output
within 20 ms.
Overcurrent
alarm value
Alarm value − 0.3 A
Current
Error code display and
Alarm Output (ALM)
100 ms or 20 ms
500 ms
Reset possible