42
d
Derivative Time (Rate)
: The Derivative Time is that time
used in calculating rate of change and thermal lag in
helping to eliminate overshoot that results in response to
process upsets. This overshoot usually accompanies
proportional only and proportional-integral processes.
The derivative action dampens proportional and integral
action as it anticipates where the process should be.
The more Derivative Time entered, the more the damping
action. The less Derivative Time entered, the less the
damping action. Enter as much Derivative Time as
necessary to eliminate overshoot without over-damping
the process, that could result in process oscillation.
Setting Range: 0 to 999.9 secs
Derivative Action is disabled when set to “0”
TEMP
Setpoint
Proportional
Action
Integral
Action
Derivative
Action
TIME
