Overspeed response time, Speed resolution accuracy for rotary systems, Overspeed response – Rockwell Automation 2094-EN02D-M01-S1 Kinetix 6200 and Kinetix 6500 Safe Speed Monitoring Safety Reference Manual User Manual
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Rockwell Automation Publication 2094-RM001C-EN-P - May 2013
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General Device and Feedback Monitoring Configuration
Chapter 5
Overspeed Response Time
The [Overspeed Response Time] parameter setting determines the maximum
reaction time from an overspeed event to the initiation of the configured [Stop
Category]. The safety reaction time from an overspeed event that triggers a Stop
Category, to the actual initiation of that Stop Category, is equal to the value of
the [Overspeed Response Time] parameter. The configurable options are 42, 48,
60, 84, 132, 228, and 420 ms.
The [Overspeed Response Time] parameter setting also determines the speed
resolution that can be achieved. The Overspeed Response Time and the encoder
resolution affect the speed resolution accuracy as shown in the tables on the
following pages.
Speed Resolution Accuracy for Rotary Systems
Table 5 - Encoder Resolution 16 lines/rev
Table 6 - Encoder Resolution 128 lines/rev
Overspeed Response Time
Setting
Speed (RPM)
1
10
100
1000
10,000
100,000
42
156.253
156.283
156.583
159.583
189.583
489.583
48
78.127
78.142
78.292
79.792
94.792
244.792
60
39.063
39.071
39.146
39.896
47.396
122.396
84
19.532
19.535
19.573
19.948
23.698
61.198
132
9.766
9.768
9.786
9.974
11.849
30.599
228
4.883
4.884
4.893
4.987
5.924
15.299
420
2.441
2.442
2.447
2.493
2.962
7.650
Overspeed Response Time
Setting
Speed (RPM)
1
10
100
1000
10,000
93,750
42
19.535
19.565
19.865
22.865
52.865
332.031
48
9.767
9.782
9.932
11.432
26.432
166.016
60
4.884
4.891
4.966
5.716
13.216
83.008
84
2.442
2.446
2.483
2.858
6.608
41.504
132
1.221
1.223
1.242
1.429
3.304
20.752
228
0.610
0.611
0.621
0.715
1.652
10.376
420
0.305
0.306
0.310
0.357
0.826
5.188