Introduction Parameter x.00
Parameter
description format
Keypad and
display
CT Modbus
RTU
User
programming
CT Soft Menu 0
Advanced parameter
descriptions
Menu 1
Commander SK Advanced User Guide 25
Issue Number: 2 www.controltechniques.com
Used in unipolar mode to define drive minimum set speed. This can be overridden if the maximum set speed clamp Pr 1.06 is adjusted to be less than
Pr 1.07. Inactive during jogging.
When this parameter is 0 the reference is given by:
Pr 1.01 = selected reference x (100 + Pr 1.38) / 100
and when this parameter is 1 the reference is given by:
Pr 1.01 = SELECTED REFERENCE + Pr 1.04
0: Allow negative references disabled
1: Allow negative references enabled
Needs to be set if the user requires to change the direction of rotation with a bipolar reference. If it is not set, all negative references are treated as
zero. Possible bipolar references are:
Preset speeds 1 to 8
Keypad reference
Precision reference
Analog reference from I/O option module
Reference from a comms option module
Both standard analog inputs are unipolar and setting this bit does not allow bipolar analog references to be applied to the drive. However, the I/O
option module will have a bipolar input for this purpose.
Analog input scaling
1.07 Minimum set speed
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
11 111
Range 0.0 to 1500.0 Hz
Default 0.0
Second motor
parameter
Pr 21.02
Update rate Background
1.08 Unused parameter
1.09 Reference offset select
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Default 0
Update rate 5ms
1.10 Allow negative references
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Default 0
Update rate Background
NOTE
Pr
or
1.07
Pr
21.02
Pr = 0 (unipolar mode)
1.10
-100% 100%
FREQ_MAX
FREQ_MAX
-100% 100%
-FREQ_MAX
Pr = 1 (bipolar mode)
1.10
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