01.04 Start-up
SIEMENS AG 6SG7000-0BA76 7-15
SIMOTRAS HD Operating Instructions
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)
t
t
Travel command
Actual speed
value
"Release brake"
signal
t
Zero position of master switch
P370
t
Controller enable
and firing pulse
enable
P088
(B0160)
(K0167)
(B0250)
Fig. 7.6.12.2 Time characteristic following cancellation of travel command
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!
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