Alarm Outputs - Omron E5AZ User Manual

Alarm Outputs

3-9

Alarm Outputs

40
• When P (proportional band) is adjusted
When P is increased
Set
Value
When P is
Set
decreased
Value
• When I (integral time) is adjusted
When I is increased
Set
Value
When I is decreased
Set
Value
• When D (derivative time) is adjusted
When D is increased
Set
Value
When D is
Set
decreased
Value
• Alarm output conditions are determined by a combination of the "alarm
type", "alarm value" and "alarm hysteresis" parameters. For details, refer
to 4-2 Alarm Hysteresis.
• The following describes the "alarm type", "alarm value", "upper-limit
alarm" and "lower-limit alarm" parameters.
Section 3-9
The curve rises gradually, and
a long stable time is achieved,
preventing overshoot.
Overshoot and hunting occur,
however the set point is
quickly reached after which
the curve stabilizes.
It takes a long time for the pro-
cess value to reach the set
point. It takes time to achieve
a stable state, however there
is little overshoot/undershoot
and hunting.
Overshoot/undershoot and
hunting occur, and the curve
rises quickly.
Overshoot/undershoot and
stable time are reduced, how-
ever, fine hunting occurs on
changes in the curve itself.
Overshoot/undershoot
increase, and it takes time for
the process value to reach the
set point.