Lenze E94A - Manual (Page 428)

5 Function blocks
5.113 L_PosProfileTable - profile data record management (simple)
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Lenze · 9400 function library · Reference manual · DMS 6.7 EN · 08/2014 · TD05
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5.113.4 Touch probe positioning
With touch probe positioning, the profile is first processed according to the set profile parameters.
If a touch probe is detected during profile processing, the profile automatically changes to the pro-
file specified under the profile parameter "TP sequence profile".
• Here the current actual position is stored at the time of the touch probe activation (by a touch
probe sensor).
• In the following relative positioning process, the "residual path" to this stored position is tra-
velled according to the increments.
[5-72] Examples for a "residual path positioning" after a touch probe is detected
• If no touch probe is detected, positioning stops after profile processing without profile linkage.
 "Starting profile"
 "Residual path profile" that is defined in the profile parameter "TP sequence profile" of the starting profile.
v [m/s]
t [s]
Œ
Touch probe
t [s]
Œ
Touch probe
v [m/s]


Position
Speed
Mode
Profile 2
...
Next TP profile 4
Position
Speed
Mode
Profile 4
...
Next TP profile
Œ

Profile 2 Profile 4
Profile 2 Profile 4

Note!
If a profile is travelled with high speed and touch probe positioning is started, the resi-
dual path of which is smaller than the result from current speed and set deceleration
ramp, the target position is "overtravelled".
• Normally a reversing movement occurs, i.e. the drive returns.
• If, for instance, a CCW rotation of the drive is forbidden by the safety module, the tar-
get cannot be approached since in this case the reversing movement is not permissib-
le.
Further constellations are possible in connection with profile chaining in which an ap-
proach of the target position is impossible.