Inovance MD500T75G - Page 269

MD500 User Manual 9. Peripheral and Options
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Description of Use of MD38PG4
1. The MD38PG4 card has two red LED indicators marked as D5 and D6. They are used to indicate the MD38PG4 state. The
indicators are described in the following table.
D5 D6 MD38PG4 State Solution
OFF OFF Normal -
21)ODVKLQJ OFF
Phase-lock loop
unlocked
Phase lag of the resolver is very large.
OFF 21)ODVKLQJ
7KH6,1&26VLJQDO
exceeds the limit.
It is caused by interference. Ground the motor well and connect the
ground point of the PG card to the PE terminals of the AC drive.
21)ODVKLQJ 21)ODVKLQJ
7KH6,1&26VLJQDO
is too small.
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connected wrongly or the wire breaks. If these caused are removed,
check whether the resolver matches the MD38PG4 card.
2. Selection of the resolver must satisfy the parameter setting requirement of the MD38PG4. Especially the excited input DC
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3. It is suggested to select a resolver with a maximum of four pole-pairs. Otherwise, the MD38PG4 will be in overloaded state.
4. On the condition that the software parameters of the AC drive are set correctly, the speed or position feedback of the
MD38PG4 is instable, it indicates that the MD38PG4 gets electromagnetic interference. In this cause, connect the shield of the
signal lines of the encoder to the PE terminal of the AC drive.
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Description of Shield Grounding of the MD38PG4
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a
b
The ground bar is
connected to PE internally.
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terminal of the PG card is connected automatically.
When connecting the signal lines of the encoder, connect the shield of the signal lines to the PE terminals of the PG card to
complete the shield grounding.
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the PG card with the prepared M3 x 8 screws.
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