Set point 2: operating frequency, Set point 3: function number – Rockwell Automation 1902 Syncpro II User Manual

Page 40

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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

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t

f

f

k

Mf

t

B

f

f

t

t

M

f

f

f

if

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SP

f

f

if

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t

t

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SP

+

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)

(

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)

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%

50

1

4

1

%

50

2

6

6

%

50

6

5

2

%

50

3

%

50

3

3

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