Adjusting Speed Feedback; Limiting Torque With Analog Inputs; Speed Feedback Detection Control (Afr) Gain: C8-08 - YASKAWA VARISPEED-616G5 Instruction Manual

Settings
D
Setting
10
11
12
15
The above table shows only those settings related to the torque limit function.
D
Set the analog input terminal's signal level, gain, and bias to match the actual input signal.
D
The factory settings for the input terminal's signal level are as follows:
D
Terminal 16:
•
Terminal 14:
•
Figure 7.2 shows the relationship between the output torque and each torque limit.
Regenerative torque limit
Reverse torque limit
Fig 7.2
When the forward torque limit has been set, the analog input signal acts as the limit value for torque
D
generated in the forward direction. The torque limit input is effective when torque is generated in the
forward direction even if the motor is operating in reverse (regenerative torque).
The torque limit is 100% of the motor's rated torque when the analog input is at its maximum value
D
(10 V or 20 mA). To increase the torque limit above 100%, set the input terminal's gain above 100%.
For example, a gain of 150.0% would result in a torque limit of 150% of the motor's rated torque with
a 10 V or 20 mA analog input.
Gain for multi-function analog input, terminal 16: H3-06
•
Gain for frequency reference (current), terminal 14: H3-10
•

7.1.2 Adjusting Speed Feedback

With open-loop vector control, internal Inverter data is used to calculate the feedback value. The gain of
this automatic frequency regulator (AFR) operation can be fine-tuned according to motor response. (Nor-
mally it isn't necessary to change the default setting.)

Speed Feedback Detection Control (AFR) Gain: C8-08

J
User User
Constant
Number
C8-08 AFR gain
Normally it isn't necessary to change this setting.
D
Fine-tune the gain when motor operation is unstable causing hunting to occur or torque/speed respon-
D
siveness is low.
When hunting occurs, increase the gain by 0.05 increments while checking the motor responsive-
•
ness.
When responsiveness is low, decrease the gain by 0.05 increments while checking the motor re-
•
sponsiveness.
Forward Torque Limit
Reverse Torque Limit
Regenerative Torque Limit
Forward/Reverse Torque Limit
0 to 10 V (A 10 V input limits the torque to 100% of the motor's rated torque.)
4 to 20 mA (A 20 mA input limits the torque to 100% of the motor's rated torque.)
Output torque
Reverse

Limiting Torque with Analog Inputs

Change g
during during
Name
Opera-
tion
×
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7.1 Open-loop Vector Control
Name
Forward direction
Forward torque limit
Motor speed
Forward
Regenerative torque limit
Reverse direction
Setting Setting Unit Factory Factory
V/f
Range Setting
Control
0.00 to Mul-
1.00
×
10.00 tiple
Valid Access Levels
Open
V/f with Flux
Loop
PG Vector
Vector
A
× ×
7