Minimum Set Speed; Reference Offset Select; Allow Negative References - Emerson 2202 Advanced User's Manual

Parameter Parameter
Introduction
x.00 description format
1.07

Minimum set speed {01}

Bit SP
Coding
Range 0.0 to 550 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. With Pr 1.10 set to On, Pr 1.07 is 0.0.
1.08 Unused parameter
1.09

Reference offset select

Bit SP
Coding
1
Default OFF(0)
Update rate 5ms
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
1.10

Allow negative references {17}

Bit SP
Coding
1
Default OFF(0)
Update rate Background
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
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
Solutions Module has 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: 9
Keypad and Serial
display communications
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 (Allow negative references mode)
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CT Modbus PLC Ladder
RTU programming
RA NC NV PT US RW BU
1
RA NC NV PT US RW BU
1
RA NC NV PT US RW BU
1
100%
-FREQ_MAX
Advanced parameter
CTSoft Menu 0
descriptions
PS
1 1
PS
1
PS
1
Menu 1
39