Introduction
Parameter
x.00
Parameter
description format
Keypad and
display
Serial
communications
CT Modbus
RTU
PLC Ladder
programming
CTSoft Menu 0
Advanced parameter
descriptions
Menu 1
Commander SK Advanced User Guide 39
Issue Number: 9 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. With Pr 1.10 set to On, Pr 1.07 is 0.0.
When this parameter is OFF the reference is given by:
Pr 1.01 = selected reference x (100 + Pr 1.38) / 100
and when this parameter is On the reference is given by:
Pr 1.01 = SELECTED REFERENCE + Pr 1.04
0: OFF Allow negative references disabled
1: On Allow negative references enabled
Needs to be set if the user requires to change the direction of rotation with a negative reference. If it is not set, all negative references are treated as
zero. Possible negative references are:
Preset speeds 1 to 8
Keypad reference
Precision reference
Analog reference from I/O Solutions Module
Reference from a comms Solutions 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
Solutions Module has a bipolar input for this purpose.
Analog input scaling
1.07 Minimum set speed {01}
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
11 111
Range 0.0 to 550 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 OFF(0)
Update rate 5ms
1.10 Allow negative references {17}
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Default OFF(0)
Update rate Background
Pr
or
1.07
Pr 21.02
-100% 100%
FREQ_MAX
FREQ_MAX
-100% 100%
-FREQ_MAX
Pr 1.10 = 0 (Unipolar mode)
Pr 1.10 = 1 (Allow negative references mode)
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