Chapter 5 Function parameter
119
Ch
ap
ter 5
Rotational transformer
2
Sine and cosine encoder
3
Wire-saving UVW encoder
4
ST500 supports multiple encoder types, the different encoders need different PG card, please
correctly choose PG card. Synchronous motor can choose any of the 5 kinds of encoder,
asynchronous motors generally only choose ABZ incremental encoder and rotational transformer.
PG card is installed, it is necessary to correctly set b0.28 according to the Actual situation,
otherwise the inverter may not play correctly.
b0.29 Encoder every turn pulse number
1 to 65535
2500
★
Set ABZ or UVW incremental encoder per rotation pulses.
In vector control with PG, we must correct the parameter, otherwise the motor will not run
properly
b0.30 Encoder installation angle
0.00 to 359.90
0.00
★
Current detection compensation for setting inverter control, if it is set too large which may
cause performance degradation.
The parameter is only valid to synchronous motors control, and it is valid to ABZ incremental
encoder, UVW incremental encoder, rotational transformer, wire-saving UVW encoder, while
invalid to sine and cosine encoders.
The parameter can used for obtaining parameters when performing synchronous motor
parameters still auto tuning and synchronous motor parameters comprehensive auto tuning, and it
is very important to the operation of synchronous motors, therefore after the synchronous motor is
first installed, the motor parameter auto tuning must be performed for functioning correctly.
b0.31
ABZ incremental encoder AB
phase sequence
Forward
0
0
★
Reverse
1
The function code is only valid to ABZ incremental encoder, that is valid only when b0.28 =
0. It is used to set the AB signal phase sequence of ABZ incremental encoder.
The function codes are valid for asynchronous motors and synchronous motors, when
preforming asynchronous motor parameters comprehensive auto tuning or synchronous motor
parameters comprehensive auto tuning, the AB phase sequence of ABZ incremental encoder can be
obtained.
b0.32 UVW encoder offset angle
0.00 to 359.90
0.00
★
b0.33 UVW encoder UVW phase sequence
Forward
0
0
★
Reverse
1
The two parameters are valid only for synchronous motor with UVW encoder.
The two parameters can used for obtaining parameters when performing synchronous motor
parameters still auto tuning and synchronous motor parameters comprehensive auto tuning, and the
two parameters are very important to the operation of synchronous motors, therefore after the
synchronous motor is first installed, the motor parameter auto tuning must be performed for
functioning correctly.
b0.34
speed feedback PG disconnection
detection time
0.0s: OFF
0.0s
★
0.1s to 10.0s
It is used to set encoder disconnection fault detection time, when it is set to 0.0s, the inverter
does not detect the disconnection fault of encoder.
When the inverter detects a disconnection fault, and the fault lasts for more than b0.34 set
time, the inverter gives out Alarm Err.20. message.
b0.35 Pole-pairs of rotary transformer
1 to 65535
1
★
The rotary transformer has pole-pairs, the correct pole-pairs parameters must be set when
using the kind of encoder.
