User manual -
ATR142- 17
Automatic/manual tuning cannot be enabled if the Soft start
is active.
8.6 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 “
n
” key to select
man.
mode; it is now possible,
to change the output percentage using the keys “
n
”
and “
m
”. 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.
8.7 Pre-Programmed cycle
Pre-programmed cycle function activates by setting
pr.cY.
on
parameter 48
op.Mo.
Controller reaches setpoint1 basing on the gradient set
on parameter 51
Grad.
, then it reaches max. power up
to setpoint2. When the process reaches max. power, this
setpoint is maintained for the time set on parameter 52
ma.t.i.
At expiry, process will reach ambient temperature according
to gradient entered on parameter 64
fa.Gr.
, then command
output will be disabled and display will visualize
Stop
.