17-61 Feedback Signal Monitoring
Select which action the frequency converter should take if a
faulty encoder signal is detected. The encoder function in
parameter 17-61 Feedback Signal Monitoring is an electrical
check of the hardware circuit in the encoder system.
Option:
Function:
[5]
Max Speed
[6]
Switch to Open Loop
[7]
Select Setup 1
[8]
Select Setup 2
[9]
Select Setup 3
[10]
Select Setup 4
[11]
Stop & Trip
[12]
Trip/Warning
[13]
Trip/Catch
3.17.5 17-7* Position Scaling
Parameters in this group define how the frequency
converter scales and handles the position values.
17-70 Position Unit
Select the physical unit for showing the position values on the
LCP.
Option:
Function:
[0]
*
pu
Position unit.
[1]
m
Meters.
[2]
mm Millimeters.
[3]
inc
Increments.
[4]
°
Degrees.
[5]
rad Radian.
[6]
%
Percent.
[7]
qc
Quad count, which is ¼ of an encoder pulse when
using quadrature encoder signal.
17-71 Position Unit Scale
Array [2]
Enter the scaling factor for the position values. The scaling
function multiplies the readout values by 10
x
, where x is the
value of this parameter. For example, if x = 2, the value 5 is
shown as 500.
The elements of the array are:
•
Index 0 is the scaling factor for readout and settings of
position values in parameters or in a fieldbus. Index 1
contains exceptions.
•
Index 1 is the scaling factor for readout of position error
(
parameter 16-08 Position Error
) and for the value of
parameter 3-08 On Target Window
.
Range:
Function:
0
*
[-3 - 3 ]
17-72 Position Unit Numerator
This parameter is the numerator in the equation which defines
the relation between 1 motor revolution and physical movement
of machine.
Position unit = Par . 17 − 72
Par . 17 − 73 × Motor revolutions
Example:
Consider a turn table application. The motor makes 10
revolutions when the table makes 1 revolution. The position unit
is a degree. For this set-up, enter the following values:
•
Parameter 17-72 Position Unit Numerator
= 360
•
Parameter 17-73 Position Unit Denominator
= 10
Set the physical unit for position values in
Range:
Function:
1024
*
[-2147483648 -
2147483647 ]
17-73 Position Unit Denominator
See
parameter 17-72 Position Unit Numerator
.
Range:
Function:
1
*
[-2147483648 - 2147483647 ]
17-74 Position Offset
Enter the absolute encoder position offset. Use this parameter to
adjust the 0 position of the encoder without physically moving
the encoder.
Set the physical unit for position values in
Range:
Function:
0
*
[-2147483648 -
2147483647 ]
17-75 Position Recovery at Power-up
Option: Function:
NOTICE
This parameter is only available with software
version 48.XX.
Select the actual position after power-up when using
open loop or incremental encoders.
[0]
*
Off The actual position is 0 after power-up.
[1]
On The frequency converter stores the actual position at
power down and uses it as the actual position when
powered up.
17-76 Position Axis Mode
Option:
Function:
NOTICE
This parameter is only available with
software version 48.XX.
Select the axis type for position counting.
Parameter Descriptions
Programming Guide
MG33MP02
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