ElmoMC SimplIQ Command Reference - Manual (Page 59)

In the above example, make the following assumptions:
• An interpolated encoder is used.
• The maximum speed of the motor remains 10,000 rpm.
• The motor is equipped with an interpolated encoder with 2048 analog
sine/cosine periods per mechanical revolution.
• The interpolation x32 (CA[31]=5) is used.
• The feedback resolution is formed as
rev counts /
65536 2 * 2048 5 =
.
The expected minimum encoder (analog sine/cosine signals without interpolation)
transition time is:
sec 4 . 732
000 , 10 * 4 * 2048
min sec/ 60
n
rpm
=
The encoder pulse time (sine/cosine signal cutting by hardware comparator) is
calculated as sec 11 . 183
4
sec 4 . 732
n
n
=
and because of the CPU clock frequency,
the minimum required encoder signal stable time should be set to 200 nsec (i.e.
EF[ ] = 1).
Attributes: Type: Parameter, Integer
Source: Program, RS-232, CANopen
Restrictions: None
Default values:
0 (RS), Non-volatile
Range: [0...127]
Index range: [1,
2]
Unit modes: All
Activation: Immediate
SimplIQ Command Reference Manual Alphabetical Listing
MAN-SIMCR (Ver. 4.5)
3-46