Lenze · 8400 HighLine · Reference manual · DMS 12.0 EN · 06/2017 · TD23 603
8 Basic drive functions (MCK)
8.11 Override
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8.11.2 Acceleration override
Activate override
If control bit 12 (EnableAccOverride) in the MCK control word
has been set to "1", an acceleration
override takes place in accordance with the stipulated override value.
If the Motion Control Kernel is downstream from the MCKInterface in the circuit, the
L_MckCtrlInterface
FB provides the following process input for activating the acceleration override:
Stipulate override value
The override value is stipulated via the nAccOverride_a input at the LS_MotionControlKernel
SB. The
override value is a percentage of the maximum acceleration that has been set for the respective
operating mode (referencing, manual jog, positioning etc.) in the corresponding profile parameter.
The acceleration override results in a deceleration override. Both ramps are evaluated by
multiplication by the acceleration override until the deceleration process sets in.
Deactivate override
If control bit 12 (EnableAccOverride) is reset to "0", travelling takes place at the acceleration rates
specified by means of the profile parameters. "Ramping up" from the acceleration defined with
override to the acceleration set in the profile takes place immediately in this case.
Designator
Data type
Information/possible settings
bEnableAccOverride
BOOL
Acceleration override
TRUE Activate acceleration override
Designator
Data type
Information/possible settings
nAccOverride_a
INT
Value for acceleration override
• Percentage multiplier (0 ... 199.99 %) for the currently active acceleration.
• 16384 ≡ 100 % of the parameterised acceleration of the corresponding operating
mode.
• If the override value is 0 %, acceleration ceases.
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