Resolver Excitation; Resolver Poles - Emerson unidrive sp User Manual

Menus 15 to 17 Parameter Keypad and
SM-Resolver structure
x.13

Resolver excitation

RW Uni
3:1 (0), 2:1 (1 or 2)
Update rate: Background read
The excitation level can be controlled for use with 3:1 ratio resolvers (Pr x.13 = 0), or 2:1 ratio resolvers (Pr x.13 = 1 or 2).
x.15

Resolver poles

RW Uni
2POLE (0), 4POLE (1),
6POLE (2), 8POLE (3 to
12)
Update rate: Background read
Resolvers with the following numbers of poles can be used with the Solutions Module.
0: 2POLE
1: 4POLE
2: 6POLE
3 to 12: 8POLE
A 2 pole resolver can be selected as drive speed feedback with a motor with any number of poles. A resolver with a number of poles greater than 2
can only be used with a motor where the number of revolver poles divides exactly into the number of motor poles i.e. a 4 pole resolver with an 8 pole
motor.
x.17 Error detection level
RW Uni
0 to 7
Update rate: Background read
Trips can be enabled/disabled using Pr x.17 as follows:
Bit Function
0 Wire break detect
1 Not used
2 Not used
The binary sum defines the level of error detection as below:
Bit 2 Bit 1 Bit 0 Error detection level
0 0 0 Error detection disabled
0 0 1
0 1 0 Error detection disabled
0 1 1
1 0 0 Error detection disabled
1 0 1
1 1 0 Error detection disabled
1 1 1
NOTE
The wire break trip is not activated provided one signal is >1.5Vrms or both are >0.2Vrms approximately.
276
Parameter Parameter
display x.00 description format
US
3:1 (0)
US
2POLE (0)
US
1
Value in Pr x.17
Wire break detect
Wire break detect
Wire break detect
Wire break detect
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descriptions
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Serial comms Electronic
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protocol nameplate
Unidrive SP Advanced User Guide
Issue Number: 10