6.2.26.4.2 Braking time
• 0: braking time
Parameter ds62[6] braking time determines the time of the DC braking. After
the time has elapsed, "zero" must be detected at the digital inputs to restart the
DC braking again.
• 8: state
The digital input determines the time of the DC braking. As long as it is set, the
DC braking is also active.
6.2.26.5 DC braking procedure
6.2.26.5.1 Start of the DC braking
The start condition is selected in ds62[1] DC braking mode.
➢ Activation by a digital input
▪ Input programmable in ds61 DC braking source
▪ Can be combined with falling below a speed level
➢ Start by the status of the ramp generator
▪ Can be combined with a speed level ds62[7] braking speed level
➢ Start depending on the CIA state machine
▪ State machine in a "stopping mode“ (quickstop, fault reaction, shut down
active, disable operation active)
▪ “stopping mode” can be combined with falling below a speed level
▪ Change of the state machine to "switched on“
➢ Start depending on the state of the ramp generator
▪ State DEC
▪ Depending on target and actual speed
The flux of the asynchronous motor must be reduced to activate the DC braking.
The method of flux reduction can be selected with ds62[2] timing mode Bit 0…2.
Currently only one mode is available. Depending on the control mode, the modula-
tion is switched off for a constant, hardware-dependent time or the flux is actively
reduced. The modulation off time is displayed in ds62[3] modulation off time.
6.2.26.5.2 Braking time
The time of DC braking is determined by ds.62[6] braking time.
When using a digital input for control and selection of ds62[2] Bit 3…4 digital input
= 8: state the duration of the DC braking is determined by the digital input.
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