West Control Solutions Pro-16 - Manual (Page 71)

Special
functions
9499-040-93811 / 59537-1 Page 71 of 88 Pro-16
9. Special functions
9.1 Start-up circuit
The start-up circuit is a special function for temperature control, e.g. hot runner control. High-
performance heating cartridges with magnesium oxyde insulation material must be heated
slowly to remove moisture and prevent destruction.
Operating principle:
1 After switching on the supply voltage, stabilised to the start-up set-point SP.St
is using a maximum start-up correcting value of Y.St.
2 The start-up holding time t.St is started one K below the start-up set-point
( SP.St-1K).
3 Subsequently, the process is lined out to set-point W.
4 If the process value drops by more than 40 K below the start-up set-point
(
SP.St- 40K) due to a disturbance, the start-up procedure is re-started ( 5, 6, 7).
g
With W < SP.St, W is used as set-point. The start-up holding time t.St is
omitted.
g
If the gradient function ( PArA/ SEtP/ r.SP OFF) was selected, start-up
value SP.St is reached with the adjusted gradient r.SP.
g
With the boost function (see chapter 9.2 page 72) selected, W is increased by
SP.bo during time t.bo .
The following settings can be selected:
SP.Fn = 10 set-point + start-up circuit
The start-up circuit is effective only with the internal set-point.
SP.Fn = 11 set-point, SP.E /SP.2 + start-up circuit
The start-up circuit is effective also with the external set-point
SP.E and the 2nd set-point SP.2.