Electro-magnetic brake

info

• All referenced variables are located in the /em-brake folder.
• When using a contactor as a brake output, ensure that the contactor opt parameter is NOT configured to close on driver init or open on driver error.
• The contactor configuration allows you to set attachment and hold voltage levels for the contactor output.

Learn more about contactor configuration

warning

Please consult your controller's hardware documentation for contactor output pinout and maximum current ratings.

The OPHION application includes an electro-magnetic brake feature that uses the controller's contactor output for brake control.

Brake activation conditions:

• Motor speed falls below the brakespeed parameter value and /driver/cmd is 0.
• When using braking driver modes, only the motor speed is checked (the cmd check is bypassed).

Brake deactivation conditions:

• /driver/cmd has a non-zero value and the current driver mode supports motor operation.

brakeoutput parameter

This parameter configures which controller output controls the electro-magnetic brake.

Value	Description
-1	No brake output - electro-magnetic brake is disabled
0	Power switch output (not available in standard variant)
1	Contactor 1 (or DOUT1)
2	Contactor 2 (or DOUT2)
3	Contactor 3

brakespeed [rpm] parameter

• Brake activates when motor speed drops below this value
• Setting this parameter to -1 causes brake activation regardless of motor speed

brakeopts parameter

This bitwise parameter configures electro-magnetic brake behavior.

Value:or click on a row to toggle.

Bit	Description
0	Invert brake logic. When set, brake activates when contactor is open.