Emerson 3403 - Keypad Reference; Precision Reference Coarse; Precision Reference Fine; Precision Reference Update Disable

Menu 1 Introduction
Parameter
x.00
Parameter
description format
Keypad and
display
Serial
communications
CT Modbus
RTU
PLC Ladder
programming
CTSoft Menu 0
Advanced parameter
descriptions
42 Commander SK Advanced User Guide
www.controltechniques.com Issue Number: 9
This parameter is the reference used when keypad reference is selected.
The range depends on the setting of Pr 1.10:
Pr 1.10 Range
0: OFF Pr 1.07 to 550 Hz or Pr 21.02 to 550Hz
1: On ±550 Hz
The drives normal frequency resolution is 0.1Hz.
Selecting these two parameters as a reference automatically selects high resolution control (unless a frequency limit is hit or slip compensation is
enabled). The frequency in this case will have a resolution of 0.001Hz. Pr 1.18 defines the reference (either positive or negative) with a resolution of
0.1Hz. Pr 1.19 defines the fine part of the reference (always positive). The final reference is given by Pr 1.18 + Pr 1.19. Therefore Pr 1.19 increases
positive references away from zero, and decreases negative references towards zero.
0: OFF Precision reference update disable off
1: On Precision reference update disable on
When this parameter is set to OFF, the pre-ramp reference (Pr 1.01) is updated with the precision reference parameters (Pr 1.18 and Pr 1.19). If the
precision reference parameters are changed while this parameter is set to OFF, the pre-ramp reference will be updated immediately.
When this parameter is set to On, the precision reference update parameters (Pr 1.18 and Pr 1.19) are continually read and updated in internal
memory but the pre-ramp reference (Pr 1.01) is not updated. Because the precision reference has to be set in two parameters, this parameter being
set to On prevents the reference from being updated while the parameters are being changed. This prevents the possibility of data skew.
1.17 Keypad reference
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
11 1 1 1
Range ±550 Hz
Default 0.0
Update rate Background
1.18 Precision reference coarse
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
11 11
Range ±550 Hz
Default 0.0
Update rate Background
1.19 Precision reference fine
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
3 111
Range 0.000 to 0.099Hz
Default 0.000
Update rate Background
1.20 Precision reference update disable
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Default OFF(0)
Update rate 5ms