Rockwell Automation 1902 Syncpro II - Manual (Page 40)

42 Rockwell Automation Publication 1902-IN001B-EN-E - April 2013
Chapter 5 Programming SyncPro II
Set Point 2: Operating Frequency
This set point determines the operating system frequency. This allows the
SyncPro II to properly determine the appropriate minimum percent slip
frequency.
Figure 17 - Function Number
Set Point 3: Function Number
The function number entry determines the slope of the curve between the 50%
speed trip time and the 95% speed trip time – set point 4 and 5. Although the trip
time is set as 50% and 95% speed, the intermediate points between these values
can be shaped to cause the trips for 51% and 94% to occur more or less quickly
depending on which function number is selected. According to
Figure 17 , more
time is allowed when function 1 is selected, and less time is allowed when
function 5 is selected.
operating
f SP =
2
b a b
a
x
b
sp sp
x
sp
a
sp sp
sp
sp sp
sp a
b
b a
k t t B Mf ta
k
f f
k
B Mf t
f f
k
Mf t B
f f
t t
M
f f f if t SP
f f if t SP
t t f F SP
+ = + =
−
=
− −
−
=
− =
−
−
=
< ≤ =
< =
=
,
) (
,
) (
,
,
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) , , (
% 50
1 4
1 % 50
2 6
6 % 50
6 5
2 % 50 3
% 50 3
3