Lenze E94AxPExxxx - Manual (Page 519)

Lenze · 9400 Servo PLC· Reference manual · DMS 4.0 EN · 11/2013 · TD05/06
519
12 Basic drive functions
12.7 Positioning
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12.7.3.4 Activating override
An "Override" is the change of profile parameters and their acceptance during the positioning
process.
• When the input POS_bEnableOverride is set to TRUE, a speed and acceleration override occurs
according to the override values applied to the inputs POS_dnSpeedOverride_n and
POS_dnAccOverride_n.
• The override values represent percentage multipliers with regard to the current profile
parameters for speed and acceleration.
• For override values ≤ 1 % a status bit is set.
• Override values ≤ 0 % are internally set to 0 %.
• Changes of the override values are accepted in each cycle.
• A deceleration override via the input POS_dnDecOverride_n can also be carried out if the input
POS_bEnableOverride is set to TRUE.
The deceleration override is effective:
• During the deceleration phase of a profile
• During an abort process
• In the case of a speed change-over from a high to a low speed within a profile (e. g. if the
speed override is used)
• If the input POS_bEnableOverride is reset to FALSE again, the speeds, accelerations, and
decelerations are run again, which have been defined via the profile parameters. There is an
immediate acceleration from the override speed to the speed set in the profile.

Note!
The online change of speed and acceleration is in effect from the start of the profile until
the deceleration phase begins. Changing the deceleration phase by means of an override
is therefore not possible!
• In the case of an override value of 0 % for the speed, the drive is brought to a standstill.
• In the case of an override value of 0 % for the acceleration, acceleration does not take
place any longer.

Note!
If the override value for deceleration is 0 %, there is no deceleration, i. e. the drive does
not come to a standstill!