Lenze 8400 TopLine - Manual (Page 653)

Lenze · 8400 TopLine · Reference manual · DMS 6.0 EN · 06/2014 · TD05/TD14
653
9 Basic drive functions (MCK)
9.11 Override
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9.11.2 Acceleration override
Activating 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.
Identifier
Data type
Information/possible settings
bEnableAccOverride
BOOL
Acceleration override
TRUE Activate acceleration override
Identifier
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.