User Manual
Rockwell Automation Publication 20P-UM001K-EN-P - July 2014 137
Programming and Parameters Chapter 3
MOTOR CONTROL
Speed Feedback
425 [Resolver Config]
Configures the attributes of the resolver feedback module.
• Bits 2 “Resolution 0” and 3 “Resolution 1” - Select the resolver to digital conversion resolution. See Table 425A: Resolution Settings below for
selections. The selection of resolver resolution affects the maximum speed that can be measured by the resolver. These numbers are theoretical and
actual limits could be higher based the application of the drive. Note the maximum speed of the drive is 6000 rpm.
• Bit 4 “Energize” - Energizes the resolver. Setting the bit to zero de-energizes the resolver (typically, leave set = 1).
• Bit 5 “Resolver Dir” - Determines the counting direction. This bit can be used to change the resolver direction when it doesn't match the motor
direction (that is, when wired backwards). 0 = forward (counting up), 1 = reverse (counting down).
• Bits 10 “Move Avg b0”, 11 “Move Avg b1”, and 12 “Move Avg b2” - Select the moving average speed filter period (see Table 425B: Moving Average
below).
Note: This parameter was added for firmware version 5.002.
File
Group
No.
Parameter Name & Description
See page 114 for symbol descriptions
Values
Data Type
Related
A
ATTENTION: Changing bit 5 “Resolver Dir” when the resolver direction matches the motor direction and Par 414
[Fdbk Device Type] is set to 4 “Resolver” may cause the motor to run at excessive speed or become damaged, which
could result in personal injury or destruction of equipment.
Options
Reserved
Reserved
Reserved
Move Avg b2
Move Avg b1
Move Avg b0
Reserved
Reserved
Reserved
Reserved
Resolver Dir
Energize
Resolution 1
Resolution 0
Reserved
Reserved
Default xxx010xxxx0100xx
Bit 1514131211109876543210
Table 425A - Resolution Settings
Bit Maximum Speed (rpm)
3 2 Resolution x1 x2 x5
0 0 10 bit 39,000 19,500 7800
0 1 12 bit 13,800 6900 2760
1 0 14 bit 3480 1740 696
1 1 16 bit 900 450 180
Table 425B - Moving Average
Bit Bit
12 11 10 Filter Period 12 11 10 Filter Period
0 0 0 2 ms 1 0 0 16 ms
0 0 1 4 ms 1 0 1 2 ms
0 1 0 8 ms 1 1 0 2 ms
0 1 1 2 ms 1 1 1 2 ms