Parameter
structure
Keypad and
display
Parameter
x.00
Parameter
description format
Advanced parameter
descriptions
Macros
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protocol
Electronic
nameplate
Performance RFC mode
Menu 7
Unidrive SP Advanced User Guide
159
Issue Number: 10 www.controltechniques.com
Setting this bit will cause the drive to re-calibrate the full scale level of analog input 1 provided the input voltage is below +1.5V or above +2.5V. This
parameter is cleared by the software automatically when the calibration is complete. If the input voltage is above +2.5V the input voltage itself is used
for calibration, and so after calibration this level will be full scale for the input. If the input voltage is below +1.5V the internal reference is used for
calibration, and so the full scale will be nominally 9.8V after calibration. The calibration level is automatically stored on power-down. It should be noted
that the Analog input 1 offset trim is included in the input voltage when the input voltage itself is used for calibration, but this trim is not included when
the internal reference is used for calibration.
Analog input 1 is filtered using a window filter to remove quantization noise and adjust the resolution of this input. The length of the window can be
adjusted with this parameter. The shortest possible window is 250
μ
s. It should be noted that if this input is not used as a speed reference (Pr
1.36
,
Pr
1.37
) or as a hard speed reference (Pr
3.22
) the sample time affects the resolution. The nominal resolution is given by Pr
7.26
x 500 x 10, therefore
the default setting gives approximately 11 bit resolution.
If an analog input is used with 4-20mA or 20-4mA current loop modes the respective bit (Pr
7.28
- analog input 2 and Pr
7.29
-analog input 3) is set to
one if the current falls below 3mA. If the current is above 3mA with these modes or another mode is selected the respective bit is set to zero.
7.25
Calibrate T5/6 analog input 1 full scale
Drive modes
Open-loop, Closed-loop vector, Servo, Regen
Coding
Bit
SP
FI
DE
Txt VM DP ND RA NC NV
PT
US RW BU
PS
1
1
1
Default
Open-loop, Closed-loop vector, Servo,
Regen
0
Update rate
Background read
7.26
T5/6 analog input 1 sample time
Drive modes
Open-loop, Closed-loop vector, Servo, Regen
Coding
Bit
SP
FI
DE Txt VM DP
ND
RA NC NV
PT
US RW BU
PS
1
1
1
1
Range
Open-loop, Closed-loop vector, Servo,
Regen
0 to 8.0 ms
Default
Open-loop, Closed-loop vector, Servo,
Regen
4.0
Update rate
Background read
7.28
T7 analog input 2 current loop loss
7.29
T8 analog input 3 current loop loss
Drive modes
Open-loop, Closed-loop vector, Servo, Regen
Coding
Bit
SP
FI
DE Txt VM DP ND RA NC NV
PT
US RW BU
PS
1
1
1
1
Update rate
Background write
7.30
T5/6 analog input 1 offset
Drive modes
Open-loop, Closed-loop vector, Servo, Regen
Coding
Bit
SP
FI
DE Txt VM DP ND RA NC NV
PT
US RW BU
PS
2
1
1
Range
Open-loop, Closed-loop vector, Servo,
Regen
±100.00 %
Default
Open-loop, Closed-loop vector, Servo,
Regen
0.00
Update rate
Background read
Summary of Contents for unidrive sp
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