beautypg.com

Elmo SERVO AMPLIFIER DBP SERIES User Manual

Page 90

background image

89

DBP - Rev 6/93

10 bit = 1040 rps

12 bit = 260 rps

14 bit = 65 rps

16 bit = 16.5rps

Resolution

DS13

DS14

10

ON

ON

12

ON

OFF

14

OFF

ON

16

OFF

OFF

Note:

- Each resolution change must be followed by new components selection

procedure.

- When changing resolution under dynamic conditions, a period of uncertainty

will exist before position and velocity data is valid.

Encoder resolution

In the STD mode (DS12 OFF), the encoder signals A,B are created by the EPLD

and can have only the following basic resolutions (for 2 pole Resolver):

256 for 10 bits

1024 for 12 bits

4096 for 14 and 16 bits

When the Resolver is more than 2 poles, the resolution for one shaft

rotation will be:

Er = QxS / 8

Q = number of Resolver poles ;

S = resolution of converter (2

10

,2

12

,or 2

14

)

When different encoder resolution is needed the encoder signals are

generated by the EPROM and the R/D resolution is no longer user selectable.

This option requires

- DS12 at ON

- Special EPROM which is programmed for this resolution.