Siemens Milltronics BW500 Operating Lnstructions page 141

P568 Batch Pre-Act
Acts on the batch operation such that when the batch totalizer is reset, the batch total is
compared to the setpoint (P564). The difference is then applied to pre-act on the setpoint
for the next batch to improve the accuracy of the batch. The activity is internally limited to
10% of the batch setpoint.
Entry:
f
0 = OFF
1 = Auto
2 = Manual
e.g. For Auto Batch Pre-Act
setpoint
pre-act
total
P569 Manual Batch Pre-Act Amount
Enter a value to make the setpoint relay change state at a known value lower than the
setpoint (P564). This allows the feeding system to empty with each batch. The value of the
manual pre-Act entry is generally reflective of the material that is left in the feeding
system.
Example:
Setpoint = 1000
Manual Pre-Act = 50
The setpoint relay will activate when the batch totalizer reaches 950.
P598 Span Adjust Percentage
Accessible only through manual span adjust (P019), when percent change (1) is selected.
% Change
Refer to
7ML19985DK05Milltronics BW500 and BW500/L - OPERATING INSTRUCTIONS
st
1 batch
1000
1000
1050
on page 42.
nd
2 batch 3
1000
950
990
rd
batch
1000
960
1000
Page 135