Alarm Outputs; Alarm Types - Omron E5CN User Manual

Alarm Outputs

3-9

Alarm Outputs

3-9-1

Alarm Types

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/
EN-@3@@@ (3 auxiliary outputs), the E5CN-@1@@@U (1 auxiliary out-
put), or the E5CN-@2@@@U (2 auxiliary outputs).
Alarms can also be used by setting the Control Output 1 Assignment or
Control Output 2 Assignment parameter to alarm 1 to 3.
Alarm outputs are determined by a combination of Alarm Type, Alarm
Value, and Alarm Hysteresis alarm output conditions. For details, refer to
4-2 Alarm Hysteresis.
• This section describes the Alarm Type, Alarm Value, Upper-limit Alarm
and Lower-limit Alarm parameters.
Set value Alarm type
0 Alarm function OFF
1 Upper- and lower-limit
2 (See note Upper-limit
1.)
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.
Alarm output operation
When alarm value X When alarm value X
is positive
Output OFF
See note 2.
L H
ON
OFF
SP
X
ON ON
OFF OFF
SP
Section 3-9
is negative
X
SP
57