Parameter Description
Parameters
177
rated torque;
According to the motor rated torque method
:
(
)
( )
(
)
W
T N.M =
rad/s
ω
Ρ
,
P(W) is on the basis of P.302,
ω(rad/s) can be worked out according to the parameter
P.307:
(
)
2
π×P.307
rad/s
60
。
• Input Value Polarity
The direction of motor output torque depends on the polarity of the Torque reference and
it has nothing to do with Run command. The following sheet shows the relationship
among Torque reference, Run command, motor run direction and inverter run indication
lamp.
Item
Torque reference
Run Command
+
-
FWD
REV
motor run
direction
Forward
Reverse
Has nothing to do with
Run Command
Inverter run
indication
lamp
Has nothing to do with Torque
reference direction and motor run
direction
FWD light on REV light on
• P.404
is the torque filter coefficient. When a bigger coefficient is set, the control will be
stable, but the control response will be worse. When the coefficient is too small, the
response will be quick, but the control can be unstable. If the best setting value is
unknown, you can adjust the setting value appropriately according to the level of unstable
control and response delay.
• When P.405=1, the torque is given by the analog or pulse input. The maximum value of
analog and pulse setting correspond to the motor rated torque. When P.405=2, the torque
is given by the communication mode. There are two ways to set the torque by
communication mode, one is changing the value of P.401when P.405 is set to 0, another
is setting by the communication address100DH when P.405 is set to 2. When the
communication address 100DH is set to -10000~10000, it represents -100%~100% of
the motor rated torque.
•
Speed limit and speed limit bias of torque control
When P.406=0
，
limit speed of torque control according to P.402 and P.403
；
When
P.406=1
，
limit speed of torque control according to frequency source, which is set by
P.79.
A bias can be added to the speed limit using parameter P.403 and parameter P.407
determines how the speed limit bias is applied. The following sheet shows the setting
relationship, and “frequency” in sheet refers to the frequency reference set by frequency
source which is set by P.79.
