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Emerson 3401 - Parameter 7.19 to 7.36 Descriptions (cont.)

Emerson 3401
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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 7
Commander SK Advanced User Guide 107
Issue Number: 9 www.controltechniques.com
Users wanting to output load should be aware of the maximum values of the parameters they are routing to the output.
The maximum value of Pr 4.02 (active current) is the maximum level of current that the drive can operate at which is drive rating x 2. Therefore, at
rated load the analog output will be 1/2 x 10 = 5V.
Users wishing to see 10V output at 100% load will need to set Pr 7.19 to Pr 4.20 and Pr 4.24 = 100.
This parameter can be used to scale the analog output if so desired. However in most cases it is not necessary as the output is automatically scaled
such that when the source parameter is at its maximum, the analog output will be at its maximum.
If analog input 1 is programmed in any of the modes 2 to 5 (see Pr 7.06 on page 104) then this bit is set to On(1) if the current input falls below 3mA.
This bit can be designated to a digital output to indicate that the current input is less than 3mA.
An offset can be added to each analog input with a range from -100% to 100%. If the sum of the input and the offset exceeds ±100% the results is
limited to ±100%.
This offers a simple control of Pr 7.19 to change the analog output. Its function is used to set the value of Pr 7.19 between a frequency output, load
output, current output, or power output, or to leave the value unchanged. A user wishing to change the analog output to something other than these
must first program this parameter to USEr (or 4).
7.20 Analog output scaling
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
3 111
Range 0.000 to 4.000
Default 1.000
Update rate 21 ms
7.21 to 7.27 Unused parameters
7.28 Current loop loss indicator
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1111
Range OFF(0) or On(1)
Update rate 5 ms
7.29 Unused parameter
7.30 Analog input 1 offset
7.31 Analog input 2 offset
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Range ±100.0%
Default 0.0
Update rate 5 ms
7.32 Unused parameter
7.33 Analog output control (Terminal B1) {36}
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Range Fr(0), Ld(1), A(2), Por(3), USEr(4)
Default Fr(0)
Update rate Actioned on exit of edit mode
Pr 7.33 Display Function Pr 7.19
0 Fr Frequency output Pr 2.01
1 Ld Load output Pr 4.02
2 A Current output Pr 4.01
3 Por Power output Pr 5.03
4 USEr Allows Pr 7.19 to be set up by user.
NOTE

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