Lenze DDS Function library 9300 Servo Manual do Utilizador descarregar pdf (Página 12)

Function block library Lenze9300Servo.lib

Special functions

2.1.1 Holding brake (L_BRK)

2−2

Lenze9300Servo.lib EN 1.1

Range of functions

· Close brake

· Open the brake (release)

· Set controller inhibit

2.1.1.1 Close brake

bSet_b

MCTRL_nNSet2_a

bOut_b

bCInh_b

|nNx_a|

wActivationTime

bQSP_b

Abb. 2−2 Signal sequence when the brake is closed

Functional sequence

1. Select the constant FIXED0% (selection number 1000) using bSet_b = TRUE, the function

close brake" is activated.

– At the same time, bQSP_b swtiches immediately = TRUE. You can use this signal to steer

the drive down to zero speed along a deceleration ramp.

2. If the speed setpoint goes below the value at nNx_a , then bOut_b switches = TRUE (operation

of the brake by a digital output).

– Invert the signal at the digital output, if you require a version that is safe against cable

breakage (e.g. through C0118).

3. Select the constant FIXED0% (selection number 1000) using bOut_b = TRUE, a timer is

started. After the time defined by wActivationTime has elapsed, then bCInh_b swtiches

immediately = TRUE.

– With this signal you can, for instance, switch the controller inhibit (device−internal). In

general, the brake−closing time is set here. This is necessary, because the brake does not

engage immediately with bOut_b = TRUE, and so the drive must provide a holding moment

during this preset period.

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Lenze DDS Function library 9300 Servo Manual do Utilizador Página 12