Control Techniques unidrive sp Advanced User's Manual page 206

Parameter Keypad and Parameter
structure display x.00
12.49 Enable position controller during brake release
Drive modes Closed-loop vector, Servo
Coding Bit SP
1
Default Closed-loop vector, Servo
Update rate Background read
If this parameter is zero then ramp hold only is applied when the drive is not active and until the end of the post-brake release delay to ensure that the
speed reference remains at zero until the brake has released. If this parameter is set to one the position controller (see menu 13) is also enabled (Pr
13.10 = 1) and the local position reference source is selected (Pr 13.04 = 4(LocAL)) during the period when ramp hold is active. 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 Pr 12.49 is
changed from one to zero Pr 13.04 and Pr 13.10 are automatically set to zero.
Unidrive SP Advanced User Guide
Issue Number: 7
Parameter Advanced parameter
description format descriptions
FI DE Txt VM DP ND
0
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Serial comms
Macros
protocol
RA NC NV PT US RW BU
1 1
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Performance
nameplate up table
PS
Menu 12
205