Chapter 12 Setting of Motor Parameters ASDA-A2R Series
12-14 Revision December, 2014
：Encoder initial magnetic field error
Causes Checking Method Corrective Actions
The initial magnetic
field is of the encoder
in error
(Signal, U, V, W of the
encoder magnetic field
is in error.)
1. Check if the servo is properly
grounded.
2. Check if the encoder cable
separates from the power
supply or the high-current
circuit to avoid the
interference.
3. Check if the shielding cables
are used in the wiring of the
encoder.
4. If it connects to Hall sensor,
please check the wiring of Hall
sensor.
If issue persists, please send the
drive back to the distributors or
contact with Delta.
Judge the causes of alarm from Hall sensor. The followings are the description.
1. Check if the wiring of Hall sensor is correct.
2. If the motor connects to digital Hall sensor, the following methods can help to identify if
digital Hall sensor can work properly.
In PC software, enter address 0xe37b and the value is 16bit. Bit1, bit2 and bit3 of this
variable corresponds to the three-phase U, V and W of Hall sensor respectively. Move the
motor will change the value.
The normal value changes regularly includes two situation mentioned below.
i. (1,0,1) =>(1,0,0) =>(1,1,0) =>(0,1,0) =>(0,1,1) =>(0,0,1)
ii. (0,0,1) =>(0,1,1) =>(0,1,0) =>(1,1,0) =>(1,0,0) =>(1,0,1)
If the value irregular changes, it means Hall sensor might have the problem that mentioned
below.
1. The problem of interference: The value irregular changes.
2. If one of the following situations is established, such as the connection between Hall
sensor and servo drive is broken, broken Hall sensor, wrong wiring, one of the value
remains or the value changes but out of order, e.g. the value shows (1, 1, 1) and (0, 0,
0), the alarm (AL.024) occurs.
：Incorrect wiring of the motor power line U, V, W, GND
Causes Checking Method Corrective Actions
The wiring of U, V,
W, GND of the
motor is incorrect
connected.
Check if U, V, W of the motor is
incorrect connected
Follow the user manual
to correctly wire U, V, W
and make sure it is
grounded.
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