Minimum Set Speed; Reference Offset Select; Allow Negative References - Control Techniques Commander SK Advanced User's Manual

Introduction Parameter x.00
description format
1.07

Minimum set speed

Bit SP
Coding
Range 0.0 to 1500.0 Hz
Default 0.0
Second motor
Pr 21.02
parameter
Update rate Background
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.
1.08 Unused parameter
1.09

Reference offset select

Bit SP
Coding
1
Default 0
Update rate 5ms
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
1.10

Allow negative references

Bit SP
Coding
1
Default 0
Update rate Background
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
NOTE
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
FREQ_MAX
Pr 1.07
or Pr 21.02
-100%
Pr 1.10 = 0 (unipolar mode)
Commander SK Advanced User Guide
Issue Number: 2
Parameter Keypad and CT Modbus
display
FI DE Txt VM DP ND
1 1
FI DE Txt VM DP ND
FI DE Txt VM DP ND
FREQ_MAX
100% -100%
Pr 1.10 = 1 (bipolar mode)
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RTU programming
RA NC NV PT US RW BU
1 1
RA NC NV PT US RW BU
1 1
RA NC NV PT US RW BU
1 1
100%
-FREQ_MAX
Advanced parameter
Menu 0
descriptions
PS
1
PS
PS
Menu 1
25