6.11 Selecting Torque Limits
6.11.3 Limiting Torque with an Analog Reference
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6.11.3
Limiting Torque with an Analog Reference
The analog voltage on the T-REF terminals (CN1-9 and CN1-10) is used to limit the torque with
an analog reference.
The smallest of the analog reference torque reference and the torque limits for Pn402
*1
and
Pn403
*2
is used.
*1.
Pn483 is used for a Linear Servomotor.
*2.
Pn484 is used for a Linear Servomotor.
The block diagrams for limiting the torque during speed control are provided below.
•
Rotary Servomotors
•
Linear Servomotors
T-REF (Torque Reference Input) Signal
The input signal that is used for torque limits with an analog voltage reference is described
below.
There is no polarity for the input voltage of the analog voltage reference for the torque limit.
The absolute value of a positive or negative voltage is input, and a torque limit that corre-
sponds to that absolute value is applied in the forward and reverse directions.
There is no polarity for the input voltage of the analog voltage reference for the force limit. The
absolute value of a positive or negative voltage is input, and a force limit that corresponds to
the absolute value of the input voltage is applied in the forward and reverse directions.
Type
Signal
Connector Pin No.
Name
Input
T-REF
CN1-9
Torque reference input
SG
CN1-10
Signal ground for torque reference input
Pn
3
00
+
+
+
–
Pn400
T-REF
V-REF
Pn101
Pn415
Pn100
Torque limit
S
ERVOPACK
Torque Reference Input Gain
S
peed Reference
Input Gain
S
peed
loop gain
S
peed Loop Integral
Time Con
s
tant
S
peed feedback
Torque
reference
T-REF Filter Time Con
s
tant
S
peed
reference input
Analog
Pn402
Forward Torque
Limit
(Refer to 6.11.1.)
(Refer to 6.7.3.)
(Refer to 6.7.1.)
Pn403
Reverse Torque Limit
(Refer to 6.11.1.)
Information
Pn
3
00
+
+
+
–
Pn400
T-REF
V-REF
Pn101
Pn415
Pn100
S
ERVOPACK
Force limit
S
peed
reference input
Force reference input gain
T-REF Filter Time Con
s
tant
S
peed Reference
Input Gain
S
peed Loop Integral
Time Con
s
tant
S
peed feedback
Force
reference
S
peed
loop gain
Pn484
Reverse Force Limit
(Refer to 6.11.1.)
Analog
(Refer to 6.7.1.)
(Refer to 6.7.3.)
(Refer to 6.5.1.)
Pn483
Forward Force Limit
(Refer to 6.11.1.)
Information