Switch-On Command For Holding Or Operational Brake - Siemens SINAMICS DCM Operating Instructions Manual
Control module for variable-speed dc drives
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10.14
Switch-on command for holding or operational brake
see also the SINAMICS DCM List Manual, function diagram 2750
The signal for controlling the brake is available at binector r53210[0]:
r53210[0] = 1 ⇒ close brake
r53210[0] = 0 ⇒ open brake
This binector must be wired to a digital output in order to activate a brake; see function
diagrams 2055, 2060, and 2065 in the SINAMICS DCM List Manual.
The following parameters affect the function of the brake-control signal:
p50080 = 0
p50080 = 1
p50080 = 2
p50087
p50088
p50319
The figures below illustrate the brake-control timing interval when a level change occurs at
the "Switch on/Shutdown" (terminal X177.12) and "Operation enable" (terminal X177.13)
inputs.
Where brake control is concerned, the "Jog", "Creep", or "Quick stop" input commands act in
the same way as "Switch on/Switch off", and the "Disconnection" or "E-STOP" input
commands act in the same way as when the "Operation enable" command is withdrawn.
The "Close brake" command is output during the optimization run for precontrol and current
controller (p50051 = 24 and 25).
SINAMICS DCM Control Module
Operating Instructions, 06.2010, C98130-A7067-A1-02-7619
10.14 Switch-on command for holding or operational brake
No brake
The brake is a holding brake:
The "Close brake" command is only applied when n < nmin (p50370,
p50371).
The brake is an operational brake:
The "Close brake" command is applied even if the motor is running.
Brake-release time:
A positive value prevents the motor from working against a brake that is
currently being released.
A negative value causes the motor to work against a brake that is still closed
in order to prevent a short-term torque-free state.
Brake-closing time:
Causes the motor to keep applying torque while the brake is closing
Delay time for ramp-function generator enable:
Following a controller enable, the setpoint 0 is applied during the time set
here. This time should be set so that the brake has actually been released
once it has elapsed. This is mainly necessary when p50087 is set to a
negative value.
Descriptions of functions
399
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