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ASDA-A3

6

6.6 Others

6.6.1 Applying the speed limit

No matter the servo drive is in Position, Speed, or Torque mode, the maximum motor speed is

determined by the internal parameter (P1.055). The methods for using the Speed Limit command

and Speed command are the same. You can use either the external analog voltage or the internal

parameters (P1.009 - P1.011). Refer to Section 6.3.1 for more details.

The speed limit is applicable only in Torque mode (T) for controlling the motor’s maximum

speed. If you are using the external analog voltage in Torque mode, you can use the available

DI signals to set SPD0 and SPD1 for the motor speed limit value (internal parameters). If there

is no available DI signals, use the analog voltage input for the Speed Limit command. When you

set P1.002 (disable / enable speed limit function) to 1, you enable the Speed Limit function.

The timing diagram is shown as follows.

Speed limit function disabled

(P1.002)

Speed limit function enabled

(P1.002)

SPD0 - 1 invalid

SPD0 - 1 valid

Source selection of speed limit command

6.6.2 Applying the torque limit

The methods for using the Torque Limit command and Torque command are the same. You can

use either the external analog voltage or the internal parameters (P1.012 - P1.014). Refer to

Section 6.4.1 for more details.

The torque limit is applicable in Position mode (PT and PR) or Speed mode (S) for limiting the

motor torque output. If you are using the external pulse in Position mode or using the external

analog voltage in Speed mode, you can use the available DI signals to set TCM0 and TCM1 for

the torque limit command (internal parameters). If there is no available DI signals, use the

analog voltage input for the Torque limit command. When you set P1.002 (disable / enable

torque limit function) to 1, you enable the Torque Limit function. The timing diagram is shown as

follows.

Torque limit function disabled

(P1.002)

Torque limit function enabled

(P1.002)

TCM0 - 1 invalid

TCM0 - 1 valid

Source selection of torque limit command

6-36

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