Pixsys DRR244 - Soft-Start Function; Pre-Programmed Cycle

18 - DRR244 - User manual
7.11 Soft-Start Function
DRR244 is provided with two types of softstart selectable on parameter 264 SS. tY. ( “Softstart Type” ).
1 First selection (
GrAd .) enables gradient softstart. AAt starting the controller reaches setpoint basing
on the rising gradient set on parameter 266
SS.G r. ( “Softstart Gradient” ) in Unit/hour (ex. °C/h). If
parameter 269
SS . ti . ( “Softstart Time” ) is diff erent to 0, at starting when the time selected on par.
269 is elapsed, the controller stops to follow the gradient and reaches setpoint with the maximum
power.
2 Second selection (
PErc.) abilita enables output percentual softstart. On par. 268 SS. tH. it is possible to
set the threshold under which starts the softstart (
“Softstart Threshold” ). On par. 267 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. 268 or until the time in minutes set on par. 269
SS . ti .
( “Softstart Time” word 2084).
If the Sof-Start function is active the automatic/manual Tuning function cannot be activated.
7.12 Pre-Programmed cycle
Pre-programmed cycle function activates by setting Enab. on parameter 263 p r. cY. .
Controller reaches setpoint 1 basing on the gradient set on parameter 266
SS.G r. , then it reaches max.
power up to setpoint 2. When the process reaches max. power, this setpoint is maintained for the time
set on parameter 270
m a . t.i ..
At expiry, process will reach ambient temperature according to gradient entered on parameter 271
f a . G r. , then command output will be disabled and display will visualize Sto p.
Setpoint
Time
Setpoint 1
Setpoint 2
Maintenance time
Mantenimento
Cooling
RareddamentoMax Power
Max Potenza
Rising gradient
Gradiente di salita
Cycle starts at each activation of the controller, or via digital input if it is enabled for this type of
functioning (parameters 231, 239 set as
st./s t. or rUn ).