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38 Unidrive SP Advanced User Guide
www.controltechniques.com Issue Number: 10
When this bit is at 0 the precision reference parameters are read and stored in internal memory. Because the precision reference has to be set in two
parameters, this bit is provided to prevent the drive reading the parameters while the reference is being updated. Instead, the drive uses the value
stored in memory preventing the possibility of data skew.
See below.
1.20 Precision reference update disable
Drive modes Open-loop, Closed-loop vector, Servo
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Default Open-loop, Closed-loop vector, Servo 0
Update rate Background read
1.21 Preset reference 1
1.22 Preset reference 2
1.23 Preset reference 3
1.24 Preset reference 4
1.25 Preset reference 5
1.26 Preset reference 6
1.27 Preset reference 7
1.28 Preset reference 8
Drive modes Open-loop, Closed-loop vector, Servo
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
11 11
Range Open-loop, Closed-loop vector, Servo ±SPEED_FREQ_MAX Hz/rpm
Default Open-loop, Closed-loop vector, Servo 0.0
Update rate 4ms read
1.29 Skip reference 1
1.31 Skip reference 2
1.33 Skip reference 3
Drive modes Open-loop, Closed-loop vector, Servo
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1111
Closed-loop vector and servo DP = 0
Range
Open-loop
Closed-loop vector, Servo
0.0 to 3,000.0 Hz
0 to 40,000 rpm
Default
Open-loop
Closed-loop vector, Servo
0.0
0
Update rate Background read