Lenze EVS9332xK - Manual (Page 100)

Function library
Function blocks
3.2.19 Setpoint conditioning (CCTRL)
3−72
l
EDSVS9332K−EXT EN 4.0
Frequent zero shifting
Procedure for applications with frequent zero shifting:
1. Disconnect the drive from the profile (CCTRL−N2−SET = HIGH)
2. Carry out function Set reference" via touch probe
3. Set code C1349/0 to 2 (CCTRL−TP−MODE, absolute−value encoder)
4. Set input CCTRL−N2−SET to HIGH
5. Set input CCTRL−TPIN/E4 to LOW
6. Assign the current distance of the tool to the machine zero point to the input CCTRL−TP−POS.
– Enter, for instance, a corresponding value via C1477/x [s−units] or C0474/x [inc].
7. Generate a LOW−HIGH edge at input CCTRL−TPIN and then reset the input to LOW.
– The distance to the machine zero point is automatically saved with mains failure protection
and is again available after mains connection.
Now the drive can be positioned to the profile position via the RFGPH2 or RFGPH3 function blocks.
This function, however, must be configured manually since it is not included in the basic
configuration.
)
Note!
l It is also possible to use absolute value encoders without homing function.
l Up to software version 3.3, the absolute value encoder must not have a zero
crossing within the measuring system of the machine. If necessary, the motor
must be turned during the commissioning procedure into the appropriate position
before being mounted.
l From software version 3.4, the zero crossing is considered automatically.
l The following applies to all software versions:
If the encoder is not supplied anymore (mains and DC 24 V are switched off), the
encoder may only be turned within certain limits:
– Single−turn absolute value encoders/resolvers by max. ±179.0 °
– Multi−turn absolute value encoders by max. ±2079.9 revolutions