Mitsubishi Electronics MR-J2S- CL Torque limit, Internal torque limits 1, Analog torque limit TLA

3. SIGNALS AND WIRING

3.4.4 Torque limit

POINT

To use the torque limit, make the external torque limit selection (TL) and internal torque limit selection (TL2) available.

The following table lists the signals and parameters related to the torque limit:

Item	Name		Remarks
Analog input signal	Analog torque limit (TLA)
Contact input signals	External torque limit selection (TL)	Servo Configuration Software setting
	Internal torque limit selection (TL2)
		required.
Contact output signal	Limiting torque (TLC)
	No.28 (internal torque limit 1)	0 to 100%
	No.29 (internal torque limit 2)	0 to 100%
Parameters	No.26 (torque limit offset)		999 to 999mV
	No.59 (function selection 2)	Selection of the rotation direction in which
		torque limit is executed

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.

Max. torque
Torque
00	100

Torque limit value [%]

(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:

Torque limit value [%]

100
00 0.05		5%
	10

TLA application voltage [V] TLA Application Voltage vs. Torque Limit Value

Servo amplifier

		TL
		SG
		P15R
2k	2k
		TLA

LG

Japan Resistor RRS10	SD
or equivalent
Connection Example

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