Honeywell AutoSet 1500 User Manual page 12

Example of how setpoints are calculated
To better understand how AutoSet 1500 automatically creates setpoints, let's look at an
example. Let's say AutoSet is installed on a 50 ton press. The percent tolerance setting is
at 10%, indicating that AutoSet will create setpoints 10% higher than the highest
measured load during the sample period. The sample period is set to 15 strokes.
The press is started. Then the reset button is pushed and held for at least two seconds.
This signals AutoSet to begin the calculation. It also changes the setpoint displays to 30.0
tons each (120% of 25 tons). 25 tons is the full scale tonnage on each side of the press.
Next, the press is run for 15 strokes. The highest measured tonnage on the left is 16 tons
and on the right is 10 tons. See Figure 1-2.
LEFT CHANNEL
TONS
30 tons
30
16 tons
20
10
0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
STROKES
Figure 1-2. Tonnage produced at each strain link in example.
Highest load is on stroke 7 for left strain link and stroke 5 for right strain link. Tonnage
at far right on each graph is setpoint calculated by AutoSet after sample period.
Instantaneously after the 15 stroke sample period ends, setpoints are calculated as follows:
The setpoint for the left strain link is:
The setpoint for the right strain link is:
These setpoints are now shown in the setpoint display.
Figure 1-3. Setpoints AutoSet created in example.
AutoSet 1500 User Manual
TONS
30
17.6 tons
20
10
0
or
or
or
or
15.1
LOAD
LEFT RIGHT
17.6
SETPOINTS
RESET
5
RIGHT CHANNEL
30 tons
10 tons
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
STROKES
16 tons + (16 tons x 10%)
16 tons + 1.6 tons
17.6 tons
10 tons + (10 tons x 10%)
10 tons + 1 ton
11 tons
9.6
11.0
Ch 1
AutoSet 1500
11 tons
1088500