Parameter
structure
Keypad and
display
Parameter
x.00
Parameter
description format
Advanced parameter
descriptions
Macros
Serial comms
protocol
Electronic
nameplate
Performance RFC mode
Menus 15 to 17
SM-Encoder Pl
Unidrive SP Advanced User Guide
287
Issue Number: 10 www.controltechniques.com
Pr
x.28
selects the format of the encoder simulation output as shown in the table below.
The marker output is derived directly from the encoder simulation input source marker. The width of the marker pulse is not adjusted with the encoder
simulation ratio, but remains the same width as the input marker. If a mode without marker lock is selected then the relationship between the marker
position and the incremental signals is undefined. If a mode with marker lock is selected the incremental position is shifted when the first input marker
occurs so that with Ab mode the marker is aligned with A high and B high, and with Fd mode the marker is aligned with F high. Marker lock is required
when the system that is receiving the encoder simulation signals requires a defined relationship between the marker and the incremental signals.
Marker lock should not be used if the drive encoder equivalent lines per revolution (ELPR) is not a power of 2 or the ELPR of the encoder simulation
output is less than 1 after the divide ratio has been applied.
Pr
x.29
and Pr
x.30
are duplicates of Pr
x.04
and Pr
x.05
respectively and not affected by the marker or freeze inputs.
Each time the marker becomes active, the non-marker position values (Pr
x.29
and Pr
x.30
) are sampled and stored in Pr
x.32
and Pr
x.33
.
x.28
Encoder simulation mode
RW
Txt
US
Ú
0 to 7
0
Update rate: Background read
Pr x.28
Mode
0
Quadrature outputs
1
Frequency and direction outputs
2
Forward and reverse outputs
3
Quadrature outputs with marker lock
4 to 7
Frequency and direction outputs with marker lock
x.29
Non-marker reset revolution counter
RO
Uni
NC
PT
Ú
0 to 65,535 revolutions
Ö
Update rate: 4ms x number of dumb modules
x.30
Non-marker reset position
RO
Uni
NC
PT
Ú
0 to 65,535 (1/2
16
ths of a
revolution)
Ö
Update rate: 4ms x number of dumb modules
x.32
Marker revolution counter
RO
Uni
NC
PT
Ú
0 to 65,535 revolutions
Ö
Update rate: 4ms x number of dumb modules
x.33
Marker position
RO
Uni
NC
PT
Ú
0 to 65,535 (1/2
16
ths of a
revolution)
Ö
Update rate: 4ms x number of dumb modules
x.35
Freeze revolution counter
RO
Uni
NC
PT
Ú
0 to 65535 revolutions
Ö
Update rate: 4ms x number of dumb modules
x.36
Freeze position
RO
Uni
NC
PT
Ú
0 to 65535 (1/2
16
ths of a
revolution)
Ö
Update rate: 4ms x number of dumb modules
Summary of Contents for unidrive sp
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