YASKAWA A1000 Technical Manual page 313


n8-72: Speed Estimation Method Selection
There is normally no need to change this parameter from the default value.
Sets a method of the speed estimation.
Note: This parameter is not available in models CIMR-A4A0930 and 4A1200.
No.
n8-72
Setting 0: Conventional method
Setting 1: A1000 method

n8-84: Polarity Judge Current
Sets the current to determine polarity for the initial polarity calculation as a percentage of the motor rated current.
Set the value in % unit (E5-03 = 100%)
Note: 1. This parameter is available in AOLV/PM and CLV/PM.
2. If operating in Advanced OLV/PM (A1-02 = 6) or CLV/PM (A1-02 = 7), the drive determines motor polarity by performing initial
polarity estimation when it starts the motor (this is done only the first time the motor is started when using CLV/PM). The drive may
begin operating in the wrong direction if it determines motor polarity incorrectly as the opposite direction of the Run command.
Monitor U6-57 displays the deviation from the integrated current, making it possible to see if initial polarity estimation has
successfully determined the motor polarity.
3. If an "Si" value is listed on the nameplate for a YASKAWA motor, n8-84 should be set to "Si" value
No.
n8-84
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
Name
Speed Estimation Method Selection
Name
Polarity Judge Current
5.9 n: Special Adjustments
Setting Range Default
0, 1

2.
Setting Range Default
0 to 150%
1
100%
5
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