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UR3274U - User manual 83
7.5 Soft Start
To reach the setpoint the controller can follow a gradient
expressed in units (e.g. degree/hour).
Enter this gradient on parameter 51
Grad.
with the chosen
units/hour; only
on subsequent activation
the controller
uses soft start function.
Automatic/manual tuning cannot be enabled if the Soft start
is active.
7.6 Automatic/Manual Regulation for %
Output Control
This function allows to select automatic functioning or
manual command of the output percentage.
Parameter 49
Au.ma.
, can select two methods.
• First selection
en.
pressing the
FNC
key display 1 shows
p.---
, while display 2
shows
Auto
.
Press the key to select
man.
mode; it is now possible,
to change the output percentage using the keys
and . To return to automatic mode, using the same
procedure, select
auto
on display 2: M led switches off
and functioning returns to automatic mode.
• Second selection
en.st.
same functioning, but with two important variants:
• If there is a temporary power failure or after switch-off,
manual functioning as well as the previous output
percentage value will be maintained at restarting.
• If the sensor breaks during automatic functioning,
controller moves to manual mode while maintaining
the output percentage command unchanged as
generated by the PID immediately before breakage.