Lenze 8400 TopLine C - Basic Drive Functions (MCK); Homing

Lenze · 8400 "Position Sequencer" technology application · Software manual · DMS 1.0 EN · 07/2014 · TD05 31
4 Detailed functions of the technology application
4.2 Basic drive functions (MCK)
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4.2 Basic drive functions (MCK)
4.2.1 Homing
In order to be able to actuate the drive in a reasonable fashion, the position of the zero position
within the physically possible travel range must be known. The zero position, also called the
"reference", can be defined by homing or reference setting. This so-called "homing" is usually carried
out after the mains is switched on. Furthermore homing is required after an encoder error has been
eliminated.
• The homing is started/stopped manually via bit 6 of the application control word
(L_ConvBitsToWord_2 FB). In the default setting, bit 6 is linked with bit 6 of MCI process data
input word 1. Pre-assignment of the process data input words
( 18)
• The "100: SetRef" homing mode is preset in C01221. Homing is not executed; in this mode the
current position is just accepted as zero point of the measuring system ("reference setting").
• Homing is to be configured according to the requirement of the application, as described in the
reference manual/online help of the inverter.
• If the home position is known to the drive, a response is sent via digital output DO3 and bit 15
of the MCI process data output word 1.
 Tip!
In addition to "manual" homing via bit 6, also the possibility of defining homing in the
program flow of the positioning sequence control is provided (ideally as the first program
step).
See description of the "Homing
" action type in the appendix. ( 43)
 Danger!
During homing, manual jog, and positioning, specially assigned profile parameters are
active. If they have not been set correctly, the drive may carry out an unexpected
movement!
 Detailed information relating to the basic drive functions and the corresponding
parameters can be found in the reference manual/online help of the inverter in the
"Basic drive functions (MCK)" chapter.
 Note!
Additional logic operations in the application prevent the basic function "Homing" from
being activated if the positioning program is processed.