Alarm Outputs; Alarm Types - Omron E5 Getting Started Manual

Alarm Outputs

3-9

Alarm Outputs

3-9-1

Alarm Types

Set value Alarm type
0 Alarm function OFF
1 (See note Upper- and lower-limit
1.)
2 Upper-limit
When P (Proportional Band) Is Adjusted
Increased
Set
value
Decreased
Set
value
When I (Integral Time) Is Adjusted
Increased
Set
value
Decreased
Set
value
When D (Derivative Time) Is Adjusted
Increased
Set
value
Decreased
Set
value
• Alarms can be used by the E5CN-@2@@@ (2 auxiliary outputs), E5AN/
E5EN-@1@@@ (1 auxiliary output), E5AN/E5EN-@3@@@ (3 auxiliary out-
puts), the E5CN-@1@@@U (1 auxiliary output), the E5CN-@2@@@U (2
auxiliary outputs), E5GN-@1@@@ (1 auxiliary output), and E5GN-
@2@@@ (2 auxiliary outputs).
Alarms can also be used by setting the Control Output 1 Assignment or
Control Output 2 Assignment parameter to any of the alarms from alarm 1
to 3. The alarm output condition is determined by a combination of the
alarm type, alarm value, alarm hysteresis, and the standby sequence.
For details, refer to 4-2 Alarm Hysteresis.
• This section describes the Alarm Type, Alarm Value, Upper-limit Alarm
and Lower-limit Alarm parameters.
Alarm output operation
When alarm value X
is positive
Output OFF
L H
ON
OFF
SP
X
ON
OFF
SP
The curve rises gradually, and a long
stabilization time is created, but over-
shooting is prevented.
Overshooting and hunting occur, but
the set value is quickly reached and the
temperature stabilizes.
It takes a long time to reach the set
point.
It takes time to achieve a stable state,
but overshooting, undershooting, and
hunting are reduced.
Overshooting and undershooting occur.
Hunting occurs.
The Controller starts up faster.
Overshooting, undershooting, and sta-
bilization times are reduced, but fine
hunting occurs on changes in the curve
itself.
Overshooting and undershooting
increase, and it takes time to return to
the set point.
When alarm value X
is negative
No alarm
See note 2. Set the deviation in the set point by
setting the alarm upper limit (H)
and alarm lower limit (L).
Set the upward deviation in the set
X
ON
point by setting the alarm value
OFF
SP
(X).
Section 3-9
Description of function
49