User guide

Parameter Descriptions www.controltechniques.com 125
to update the value of the analog output. For a list of
parameters that can be used, refer to the Drive Menu
Watch view in PowerTools Pro, or the Unidrive SP
Advanced User Guide.
Unidrive SP I/O Status Word
SPConnect.DigitalIOReadWord
This parameter is a bitmap that contains the status of the
digital I/O on the Unidrive SP. This parameter is read-only
and is used to control the virtual LED’s on the Drive I/O
Setup view.
Drive Mode
SPDrive.DriveMode
This parameter is accessible from the Drive/Encoder view
and allows the user to define what type of application the
Unidrive SP will be configured for. Available selections
from this list box are Servo and Closed-loop Vector. Based
on the setting of this parameter, information on the motor
tab will change to allow configuration of the different motor
parameters, and the SM-EZMotion module will
automatically change the Unidrive SP’s operating mode on
power up or warm start. This parameter cannot be changed
while online.
Unidrive SP Encoder Supply Voltage
SPDrive.EncoderSupplyVoltage
This list box found on the Motor/Encoder View provides
direct access to parameter 3.36 of the drive frequency/
speed configuration menu. To support many different
applications, the Unidrive SP can provide several different
supply voltages. Select from 5V, 8V, or 15V to be provided
from the drive hardware to the encoder. Be sure to set this
to a value equal to or lower than the encoder supply
specification. Setting this too high could potentially
damage the encoder.
Unidrive SP Encoder Revolution Counter
SPDriveEncRevCount
This read-only parameter displays the number of whole
revolutions that the motor encoder signal has moved since
powered up (absolute) and can be found on the Online tabs
on the Status and Position views. The units for this
parameter are always revolutions since those are the units
used by the Unidrive SP and its’ option modules. The value
for this parameter comes from parameter 3.28 of the
Unidrive SP database.
Unidrive SP Fine Encoder Position
SPDriveEncRevFinePosition
This read-only parameter displays the number of fractions
of a revolution that the master encoder signal has moved,
and can be found on the Online tabs of the Status and
Position views. The units for this parameter are always 1/
(2
32
) of a revolution since those are the units used by the
Unidrive SP and its’ option modules. The value for this
parameter comes from parameter 3.30 of the Unidrive SP
database.
Early releases of the SM-EZMotion module do not support
use of high resolution encoders. Therefore, the value for
this parameter will always be displayed as 0.
Unidrive SP Encoder Position
SPDriveEncRevPosition
This read-only parameter displays the number of fractions
of a revolution that the master encoder signal has moved,
and can be found on the Online tabs of the Status and
Position views. The units for this parameter are always 1/
(2
16
) of a revolution since those are the units used by the
Unidrive SP and its’ option modules. The value for this
parameter comes from parameter 3.29 of the Unidrive SP
database.
Unidrive SP Drive Status Bitmap
SPDriveStatus
The SPDriveStatus parameter is a decimal value that
equates to the state of the Status Bits in the Unidrive SP.
This is a read-only parameter and is read directly from
parameter 10.40 in the Unidrive SP database. The
individual bits in the bitmap are detailed below
Bit 15 = Not Used Not Used
Bit 14 = Parameter 10.15Mains Loss
Bit 13 = Parameter 10.14Direction Running
Bit 12 = Parameter 10.13Direction Commanded
Bit 11 = Parameter 10.12Braking Resistor Alarm
Bit 10 = Parameter 10.11Braking IGBT Active
Bit 9 = Parameter 10.10Regenerating
Bit 8 = Parameter 10.09Drive Output Is At Current Limit
Bit 7 = Parameter 10.08Load Reached
Bit 6 = Parameter 10.07Above Set Speed
Bit 5 = Parameter 10.06At Speed
Bit 4 = Parameter 10.05Below Set Speed
Bit 3 = Parameter 10.04Running At Or Below Min Speed
Bit 2 = Parameter 10.03Zero Speed
Bit 1 = Parameter 10.02Drive Active
Bit 0 = Parameter 10.01Drive Healthy