Lenze E84DSxxx - Manual (Page 321)

Lenze · 8400 protec StateLine · Reference manual · DMS 4.2 EN · 03/2013 · TD05
321
8 Basic drive functions (MCK)
8.4 Holding brake control
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8.4.6 Feedforward control of the motor before release
The motor is precontrolled by selecting the lower speed threshold for applying the brake. When the
upper speed threshold for brake release is reached, the motor is precontrolled for 200 ms with the
lower threshold before the brake switches to the release mode.
Here, the direction of the feedforward control depends on two conditions:
1. On the settings selected under C02582 :
• Bit 2 = inverted feedforward control
• Bit 3 = direction of the axis
2. On the sign of the setpoint.
Truth table for the direction of the feedforward control
Related topics:
 Functional settings ( 311)
 Switching thresholds ( 312)
Setpoint Direction Feedforward control Scheme Direction
Feedforward
control value
Start value
n ≥ 0 vertical/hoist
( C02582 : Bit 3 = 0)
not inverted
( C02582 : Bit 2 = 0)
inverted
( C02582 : Bit 2 = 1)
n < 0 not inverted
( C02582 : Bit 2 = 0)
inverted
( C02582 : Bit 2 = 1)
n ≥ 0 horizontal/winding drive
( C02582 : Bit 3 = 1)
Inversion via bit 2 with
horizontal direction not
effective
n < 0
0
P
Q
0
P
Q
0
P
Q
0
P
Q
0
Q
0
Q