User manual - ATR144- 29
8.11 Soft start function
ATR144 is provided with two types of softstart selectable on
parameter 110 SS.tY. (“Softstart Type”).
1 First selection (G rA d .) enables gradient softstart. At starting
the controller reaches setpoint basing on the rising
gradient set on parameter 111 SS . G r. (“Softstart Gradient”)
in Unit/hour (ex. °C/h). If parameter 114 SS . ti . (“Softstart
Time”) is diff erent to 0, at starting when the time selected
on par. 114 SS . ti . is elapsed, the controller stops to follow
the gradient and reaches setpoint with the maximum
power.
2 Second selection (PErc.) enables output percentual
softstart. On par. 113 SS. tH. it is possible to set the threshold
under which starts the softstart (“Softstart Threshold”).
On par. 112 SS. PE. (“Softstart Percentage”) an output
percentage is selectable (from 0 to 100), which controller
keeps until the process exceeds the threshold set on par.
113 SS. tH. or until the time in minutes set on par. 114 SS . ti .
(“Softstart Time”).
If the Sof-Start function is active the automatic/manual
Tuning function cannot be activated.
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