Lenze E94AxPExxxx - Manual (Page 461)

Lenze · 9400 Servo PLC· Reference manual · DMS 4.0 EN · 11/2013 · TD05/06
461
12 Basic drive functions
12.6 Homing
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12.6.2.2 Homing mode
The zero position, also called reference, can be defined by a reference search or reference setting:
• In case of a reference search the drive travels according to a defined mode to detect the
reference independently.
• In case of reference setting the reference is manually set when the drive has stopped.

Tip!
A reference search is mainly used in the case of continuously running systems, or if the
traversing range or machine cycle of the drive cannot be represented in the display area of
the encoder, e. g. if incremental encoders are used at the motor, or singleturn absolute
value encoders or resolvers are used at the gearbox.
A reference is mainly set in systems/machines that bear the risk of collisions, or every time
no homing can be executed (e.g. in case of a cross cutter having material in the machine).
• For reference setting, select the homing mode "100" in C02640 .
• For a reference search the homing modes 0"..."15" are provided in C02640 .
• For process descriptions see the chapter " Overview of the Lenze homing modes ". ( 466)
• According to the DS402 device profile, additionally the homing modes "1001"..."1035" are
provided in C02640 . Process descriptions for these homing modes can be found in the
chapter " Overview of DS402 homing modes ". ( 466)

Note!
Profile data set change-over
For the reference search, two profile data sets with different speeds and accelerations
can be parameterised. In this way, the homing time can be reduced and at the same time
the accuracy can be increased.
 Profile data set change-over ( 463)
The process descriptions in the following chapters provide information on the time the
change-over to the profile data set 2 takes place in the corresponding homing mode.
 Overview of the Lenze homing modes ( 466)
 Overview of DS402 homing modes ( 478)
If the speed 2 ( C02646 ) is set to "0" (Lenze setting), no change-over to the profile data set
2 takes place and the reference search and positioning to the target position is only
executed with the profile parameters of the profile data set 1.

Note!
Drive behaviour after setting the reference
C02641 can be used to parameterise the drive behaviour after setting the home position.
 Drive behaviour after setting the home position ( 462)
In the Lenze setting ( C02641 = "0"), the drive traverses to the absolute target position set
in C02643 similarly to the behaviour known from the previous versions.