Torque Limit - Mitsubishi Electric MR-J2S-CP Instruction Manual

3. SIGNALS AND WIRING

3.4.4 Torque limit

The following table lists the signals and parameters related to the torque limit.
Item
Analog input signal
Contact input signals
Contact output signal
Parameters
The torque limit is available in two types: internal torque limit set in parameters and analog torque limit
(TLA) using analog input signal. This function limits torque on the assumption that the maximum torque
of the servo motor is 100%.
(1) Internal torque limits 1, 2
Use parameter No.28 and 29 to set the internal torque limit values. The following graph shows the
torque relative to the setting.
(2) Analog torque limit (TLA)
By applying a voltage (0 to 10V) to the analog torque limit (TLA) terminal, limit values can be set from
outside consecutively. The following graph shows the relationship between input voltage and limit
value.
Depending on the servo amplifier, the limit value has about 5% variations to the input voltage. As this
may not cause torque to be limited sufficiently at less than 0.05V, use this function at the voltage of
0.05V or more.
Refer to the following diagram when using the 15V power output (P15R) of the servo amplifier:
POINT
To use the torque limit, make the external torque limit selection (TL) and
internal torque limit selection (TL2) available.
Name
Analog torque limit (TLA)
External torque limit selection (TL)
Internal torque limit selection (TL2)
Limiting torque (TLC)
No.28 (internal torque limit 1)
No.29 (internal torque limit 2)
No.26 (torque limit offset)
No.59 (function selection 2)
Max. torque
100
5%
0
0 0.05 10
TLA application voltage [V]
TLA Application Voltage vs.
Torque Limit Value
MR Configurator (servo configuration
software) setting required.
0 to 100%
0 to 100%
999 to 999mV
Selection of the rotation direction in which
torque limit is executed
0
0 100
Torque limit value [%]
2k
2k
Japan Resistor RRS10
or equivalent
Connection Example
3 - 17
Remarks
Servo amplifier
TL
SG
P15R
TLA
LG
SD