Siemens SIMOTRAS 6SG7050 Operating Instructions Manual page 101

01.04
Setting information:
• Set the delay time using parameter P319 so that the setpoint is not enabled via the ramp-
function generator until the brake has actually been released.
Caution: If the value of P319 is too low, the drive will run against the brake for a while!
If the value of P319 is too high, there will be an unnecessarily long delay after the master
switch is activated!
The following actions take place after cancelling a travel command :
1. The ramp-function generator input is set internally to 0, i.e. the ramp-function generator
begins to ramp down.
2. If the actual speed falls below the value n_min (P370), the "Release brake" signal is
cancelled.
3. The firing pulse and the controller are disabled using the delay time P088 (e.g. until the
brake has definitely been closed)
Travel command
(B0160)
Actual speed
value
(K0167)
"Release brake"
signal
(B0250)
Controller enable
and firing pulse
enable
Fig. 7.6.12.2
Setting information:
• Use parameter P370 to set the minimum speed at which the brake should be closed (factory
setting 5%).
• Use parameter P088 to set the delay time so that the firing pulses are only disabled after the
brake has actually been closed (delayed controller shut-off).
Caution: If the value of P088 is too low, there may be a load slump because the load can no longer
be held electrically and the mechanical brake has not yet closed completely. This results
in a brief slump in the load in the case of suspended loads!
SIEMENS AG 6SG7000-0BA76
SIMOTRAS HD Operating Instructions
Zero position of master switch
P370
Time characteristic following cancellation of travel command
t
t
t
t
P088
Start-up
7-15