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Parameter x.00
Parameter description
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Performance
Menu 12
Mentor MP Advanced User Guide 169
Issue Number: 4 www.controltechniques.com
The post-brake release delay is used to allow for the brake release time. During this period the speed reference is held constant at zero, so that there
is no sudden increase in motor speed when the brake actually releases.
The brake apply delay is used to allow for the brake application time. During this period the Hold zero speed parameter (Pr 6.08) is one, and so the
drive is enabled with zero speed reference. This ensures that the motor remains stationary while the brake is being applied.
This parameter can be used to change the operating mode of the drive when the brake is released. The selected change in operating mode takes
place after the programmed post brake release delay and after the programmed brake applied delay. For the default value of 0, no action taken.
1 Position controller activated.
When this parameter is set to one, the position controller (see menu 13) is enabled (Pr 13.10 = 1) and the local position reference source is selected
(Pr 13.04 = 4 (LocAL)) during the period when the brake is released until the end of the delay, and again after the brake is applied ready for the next
start. Provided the default non-absolute mode is selected, the position controller can help to limit the movement of the motor when the brake is
released. When parameter Pr 12.49 is changed from one to zero, Pr 13.04 and Pr 13.10 are automatically set to zero.
2 Jog override
When this parameter is set to two, the jog inputs to the sequencer take priority over the run inputs during the period when the brake is released until
the end of the delay, and again after the brake is applied ready for the next start. This allows the user to use the jog reference to pick up the load and
then switch to the selected run reference when the brake is off.
When Pr 12.51 is 0 this parameter is 0 when the absolute value of the field flux (Pr 5.54) is below 80 % and 1 when the absolute value of the field flux
(Pr 5.54) is above 80 %.
When Pr 12.51 is a 1 the internal field controller does not control this parameter. An external field controller can then be used to control Pr 12.50.
When Pr 12.51 = 0, Pr 12.50 is controlled by the internal field controller.
When Pr 12.51 = 1, Pr 12.50 is controlled by an external field controller.
12.47
Post-brake release delay
Coding Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1 111
Range 0.0 to 25.0 s
Default 1.0 s
Update rate Background read
12.48
Brake apply delay
Coding Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Range 0.0 to 25.0 s
Default 1.0 s
Update rate Background read
12.49
Brake release action
Coding Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Range 0 to 2
Default 0
Update rate Background read
12.50
Field active
Coding Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Default 0
Update rate Background write/read
12.51
External field control
Coding Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Default 0
Update rate Background read
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