Inovance MD500 Series - Page 253

8. Peripherals and Options
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Extension Resolver Card (MD38PG4)
Table 8-18 Terminal descriptions of MD38PG4
Terminal Pin Denition Function Description Pin Arrangement
CN2 1 EXC1 Resolver excitation negative
1
2
3
4
5
6
7
8
9
EXC1
EXC
NC
NC
SIN
NC
SINLO
COSLO
COS
2 EXC Resolver excitation positive
3 SIN Resolver feedback SIN positive
4 SINLO Resolver feedback SIN negative
5 COS Resolver feedback COS positive
6, 7, 8 NC Vacant internally
9 COSLO Resolver feedback COS positive
CN1 18-pin FFC interface, connecting to J4 on the control board of the AC drive
● Indicators
Indicator State MD38PG4 Fault State Description
D5 (ON), D6 (ON) Signal SIN/COS
amplitude too small
Generally, DB9 is not connected or
wrongly connected, or even wire breaks.
If the preceding conditions do not occur,
check whether the resolver matches
MD38PG4.
D5 (ON), D6 (OFF) Phase-lock loop
unlocked
Phase lag of the resolver is very large.
D5 (OFF), D6 (ON) Signal SIN/COS
amplitude exceeding
the upper limit
It is caused by interference. Ground the
motor well and connect the ground point
of the resolver card to PE of the drive.
D5 (OFF), D6 (OFF) Normal -
Wiring of MD38PG4 is shown as follows:
EXC
EXC1
15V
15V
SIN+/COS+
SIN-/COS-
SIN/COS
SINL0/COSL0
PE
Twisted
pair
Twisted
pair
EXC+
EXC-
Resolver card
Encoder
Note
● Selection of resolver must satisfy parameter setting requirement of
MD38PG4. Especially excited input DC resistance must be larger
than 17 Ω (can be measured by multimeter). Otherwise, MD38PG4
cannot work normally.
● It is suggested to select a resolver with a maximum of four pole-pairs.
Otherwise, MD38PG4 will be overloaded.