User Interface: Preparing The Nc Axis As Plc Axis; User Interface: Functionality - Siemens SINUMERIK 840D sl Function Manual

General signals from axis/spindle (excerpt)
State interrogation is possible via the interface DB390x.DBB8. However, for simulation, the
axis machine data MD30350 MA_SIMU_AX_VDI_OUTPUT must be set.
DB3900 ... 3907
Data block
Byte Bit 7
DBB 0008 PLC axis/
spindle
Request and relinquish PLC axis
14.6.4.3

User interface: Functionality

The two tables provide an overview of the available interface signals. The precise description
of the signals and the explanation of what signals are relevant for the individual functions are
explained in the following.
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Signals from axis/spindle [r]
Bit 6 Bit 5
Neutral ax‐ Axis inter‐
is/ change
spindle possible
NCK → PLC interface
Bit 4 Bit 3
New type
requested
from PLC
P4: PLC for SINUMERIK 828D
14.6 Function interface
Bit 2 Bit 1 Bit 0
NC axis/
spindle
1125