78 • vacon description of parameters
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7
Parameters for mechanical brake control
1535 Freq Limit brake open, OL
(2.3.8.3)
Frequency limit for brake open in open loop control.
Frequency reference is also limited to this value until brake is opened
1539 Close Freq Limit
(2.3.8.7)
Frequency limit for brake close enable.
Brake close delay ID1541 starts to count when stop command is given and the frequency
is ramped down to this limit.
1541 Brake close delay
(2.3.8.8)
Delay time for brake close after close frequency limit given by ID1539 is reached. This
parameter is normally set to 0,00 s.
1544 Brake reaction time
(2.3.8.6)
Set the physical reaction time for the mechanical brake by this parameter.
Waits this time before the reference is released after brake is commanded to open.
NOTE: This parameter has no influence if an digital input is programmed for brake open
acknowledgement. See P2.2.5.24.
1550 Mechanical brake used
(2.3.8.1)
Set this parameter to 1 when there is a mechanical brake in the system.
Then the frequency reference will be limited to ID1535/ID1553 until brake is opened.
1551 Current limit open
(2.3.8.2)
Motor current has to exceed this limit to enable brake open.
1553 Freq Limit open, CL
(2.3.8.4)
Frequency limit for brake open in closed loop control.
Frequency reference is also limited to this value until brake is opened
This parameter is normally set to 0.
1554 Brake open delay
(2.3.8.5)
Delay time for brake open after open conditions are fulfilled (current and frequency
limits)
In closed loop the internal variable Rotor flux ready is also required for brake open.
The mechanical brake is commanded to open after this delay time has expired.
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