YASKAWA G7 Series Technical Manual page 341

Inputting Torque References and Torque Reference Directions
The torque reference can be changed according to an analog input by setting H3-09 (Multi-function analog
input terminal A2 selection) or H3-05 (Multi-function analog input terminal A3 selection) to 13 (torque refer-
ence) or 14 (torque compensation). The torque reference input methods are listed in the following table.
Torque Reference Input
Method
Voltage input (0 to 10 V)
±
Current input (4 to 20mA)
Option Card (AI-14B)
(0 to 10 V)
±
The direction of the torque output from the motor will be determined by the sign of the analog signal input. It
does not depend on the direction of the run command. The direction of torque will be as follows:
Positive analog reference: Torque reference for forward motor rotation (counterclockwise as viewed from
•
the motor output axis).
Negative analog reference: Torque reference for reverse motor rotation (clockwise as viewed from the
•
motor output axis).
Application Precautions
If the analog signal input level is 0 to 10V or 4 to 20mA, a forward torque reference will not be applied. To
apply reverse torque, use an input level of -10V to 10V or switch the direction using a multi-function input set
to 78 (polarity reverse command for external torque reference).
Torque compensation
from analog input
Torque reference Torque primary delay
from analog input filter
1
Speed limit from analog
input from terminal A1
Speed limit
d5-04
2
d5-03
Speed limit bias
d5-05
Speed feedback
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Reference Location
H3-04 = 1
Between A3 and AC
H3-05 = 13
Between A2 and AC
H3-08 = 1
(Turn OFF pin 2 of
H3-09 = 13
SW1.)
Between A2 and AC
H3-08 = 2
(Turn ON pin 2 of
H3-09 = 13
SW1.)
F2-01 = 0
Between TC2 and TC4 H3-08 = 1
H3-09 = 13
d5-02
+
Speed controller
(ASR)
−
Speed limiter
Fig 6.64 Torque Control Block Diagram
Selection
Remarks
Method
Set H3-04 to 0 for a 0 to 10-V torque ref-
erence.
To switch the torque reference between
positive and negative torque, set a multi-
function analog input to 78.
Set H3-08 to 0 for a 0 to 10-V torque ref-
erence.
To switch the torque reference between
positive and negative torque, set a multi-
function analog input to 78.
The input can be used for torque compen-
sation by setting H3-09 to 14.
To switch the torque reference between
positive and negative torque, set a multi-
function analog input to 78.
The input can be used for torque compen-
sation by setting H3-09 to 14.
The input can be used for torque compen-
sation by setting H3-05 to 14.
+
Priority
Torque limit
circuit
+
+
Refer to torque limit setting
via constants and analog input
Individual Functions
Internal torque
reference
123
6-