Commissioning The Plc Axis - Siemens SINUMERIK 808D ADVANCED Series Commissioning Manual

13.11

Commissioning the PLC axis

The PLC can control axes/spindles via data blocks of the PLC user interface. The PLC axis can be used for turret/magazine
control or workpiece transfer on a turning or milling machine.
There are three positioning modes for the PLC axis:
● Positioning via the PLC user interface
● Positioning with the indexing position table predefined in the general machine data
● Positioning according to the distance value defined in the axis machine data
PLC user interface
Signals to PLC axis (excerpt)
DB380x PLC -> NCK interface [r/w]
Byte Bit 7
8 Request
PLC ax-
is/spindle
3000 Start axis
positioning
3002
3003 Indexing
position
3004
3008
Signals from PLC axis (excerpt)
DB390x Signals from PLC axis [r]
NCK -> PLC interface
Byte Bit 7
8 PLC axis/
spindle
3000 Positioning
axis active
3003
276
Bit 6 Bit 5
Position (REAL, with indexing axis: DINT)
Feedrate velocity (REAL), if < 0, the value is taken from machine data POS_AX_VELO
Bit 6 Bit 5
Neutral Axis inter-
axis/ spin- change
dle possible
Position
reached
Bit 4 Bit 3
NC/PLC
axis activa-
tion signal
Bit 4 Bit 3
New type
requested
from PLC
Error number
Bit 2 Bit 1
Traversing Distance
dimension, condition,
inches (not shortest
metric) distance
(DC)
Distance
condition,
absolute
positive
direction
(ACP)
Bit 2 Bit 1
Error while
traversing
Commissioning Manual
6FC5397-4EP10-0BA8, 07/2018
Bit 0
Request
NC ax-
is/spindle
Distance
condition,
incremental
(IC)
Distance
condition,
absolute
negative
direction
(ACN)
Bit 0
NC ax-
is/spindle
Axis cannot
be started