Siemens SIMODRIVE 611 universal Function Manual page 573

01.99 06.04 07.03
Closing the brake The axis is actively braked when the "controller enable" is withdrawn.
when withdrawing The brake delay time (P0853) is started when the "ramp–function gene-
the "controller rator enable" signal drops–out, i.e. at nset = 0.
enable"
At n = n
S
Objective for this The time required to close the holding brake should be adjusted so that
setting the control is only withdrawn after the brake has closed. This prevents
an axis from possibly sagging.
Controller
enable
Ramp–function
generator
active (internal)
Speed–controlled
operation
Speed setpoint
Speed actual
value
n
holding brake
Output signal
"open holding brake"
Internal
controller
enable
Output signal
"status, controller
enable"
Holding brake
Fig. 6-74 Closing the brake: Behavior when withdrawing "controller enable"
E Siemens AG 2005 All Rights Reserved
SIMODRIVE 611 universal Description of Functions (FBU) – 04.05 Edition
(P0852), the following is valid:
holding brake
The "open holding brake" output signal is deleted
Note:
After the brake delay time has expired (P0853), the "open holding
brake" output signal is always canceled.
1
0
1
0
P0852
1
0
P0853
1
0
1
0
1
Ä Ä Ä Ä
0
Ä Ä Ä Ä
Time
to close the holding brake
6 Description of the Functions
6.9 Motor holding brake
Note:
In the example, the
"ramp–down time, ramp–function
generator" = 0
Drive braked actively
(e.g.: regenerative braking)
Brake delay time
P0854 Controller inhibit time
t
t
t
t
t
t
t
t
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