JUMO 705010 mTRON T - Multichannel Controller Module Operating Manual - Manual (Page 78)

6 Configuration
78
Optimization according to the step response method
Initially, a configurable standby output is produced until the actual value "settles" to a constant.
This is automatically followed by a configurable output level step (step size) to the control path.
Main applications of the step response method:
•
Optimization immediately after "power on" during startup (considerable time saving, stand-
by output setting = 0 %)
• Control path does not oscillate easily (e.g. extremely well insulated furnace with low losses,
long oscillation period)
• Actual value must not exceed the setpoint value
If the output level is known for the corrected setpoint value, overshooting is prevented with
the following setting:
Standby output + step size
 output level in corrected state
The progression of the output level and actual value depends of the status of the process at
the point when self-optimization starts:
Self-optimization during the startup
phase Self-optimization during operation
t
y
S
y
t
x
w
t1 t2 t3
}
Dy
{
y
x
y
S
t1 t2 t3
Dy
t
t
w
y Output level
y Step size
y
S
Standby output t1 Start of self-optimization
x Actual value t2 Point of output level step
w Setpoint value t3 End of self-optimization