PMA KS 90 Mode D'emploi page 10

Ramp function
Start: 24 V at
control input W/W2.
W2 is lit.
Cancellation: 0 V at
control input W/W2
+After start, the actual process value is used as start value and the ramp follows
the equation and the start behaviour, e.g. with X=W, SP2 is reached after Pt2.
+When switching on the controller with 24 V at the control input for W/W2, the
ramp is started immediately. With Pt2 = 0 the effective set-point jumps to
SP2 (safety set-point).
+If SP2 is switched off (key D, display '----'), the ramp function is off.
Gradient function
Start: automatically
w
at supply voltage
switch-on
w
after set-point
changes
w
with switch-over
from W2 to W
Cancellation:
w
when reaching the set-point
w
when switching from W to W2
+If Gr is switched off (key D, display '----'), the gradient function is off.
Start-up circuit (not with 3-point stepping controllers)
After switching on mains (Ü) with X< SPA<W, the process value is controlled
towards set-point SPA (*, Ymax = yA). One degree below, holding time PtA starts
(Ö). At holding time end, the process is lined out at set-point W (ä). If switched to
2nd set-point, SP2 will be valid (#). If a disturbance (<) causes the process value to
drop more than 40 degrees below set-point SPA, the procedure re-starts (> y). W2
blinks with running procedure.
+With SP2 < SPA and active W2, SP2 is used as start-up set-point.
+With W < SPA, W is used as start-up set-point.
+With start-up circuit, Pt2 = 0 and is not accessible at parameter level.
8
W2 blinks
Start
Power
failure
Control input W/W2
W2
W2 is off
blinks
Control input W/W2
W2 is W2 is on
off (ramp function)