Control Techniques SM-Encoder Output Plus, Руководство пользователя

Страница: 8 / 42

8
SM-Encoder Plus & SM-Encoder Output Plus User Guide
www.controltechniques.com Issue: 4
Example:
A date code of L35 would correspond to week 35 of year 2002.
3.3 Set-up parameters
All parameters associated to the SM-Encoder Plus or SM-Encoder Output Plus can be
found in either menu 15, 16, or 17. Each of menus 15, 16, and 17 refer to one of the
available slots into which the Solutions Module can be fitted. Slot 1 = Menu 15, Slot 2 =
Menu 16, Slot 3 = Menu 17.
3.4 Compatible encoder types
The SM-Encoder Plus and SM-Encoder Output Plus are compatible with the following
encoders types:
Incremental encoders Ab, Fd, and Fr
This type of encoder gives incremental position and can only be used for control in
Closed Loop Vector and not Servo mode.
Quadrature detection logic determines rotation from the phase relationship of the two
channels.
These encoders are available with a marker pulse, which identifies each individual
rotation of the disc, and is also used to reset the drive position parameter. The
incremental encoder can be used when operating in Closed Loop Vector mode, with the
optional marker pulse not being required for correct operation.
* Max input frequency = LPR x rpm / 60
There are only two available slots for Unidrive SP size 0 and Digitax ST.
NOTE
Type Encoder Description Pr x.15
Incremental
Ab
Quadrature incremental encoder.
With or without marker pulse.
0
Fd
Incremental encoder with frequency and direction outputs.
With or without marker pulse.
1
Fr
Incremental encoder with forward and reverse outputs.
With or without marker pulse.
2
Limitations
Type Encoder Max Input
Frequency
Max no. of
Lines (LPR)
Incremental
Ab
500kHz* 16,384 Fd
Fr
The maximum speed in rpm which an encoder connected to the SM-Encoder Plus or
SM-Encoder Output Plus can reach can be calculated from :
Max rpm = (60 x Max input frequency) / Encoder LPR
e.g. For a 4096 line encoder the maximum rpm would be:
(60 x 500 x 10
3
) / 4096 = 7324rpm
NOTE