Siemens SINUMERIK 840D sl Function Manual page 1126

P4: PLC for SINUMERIK 828D
14.6 Function interface
Signals to PLC axis
DB3800...3807
Data block
Byte Bit 7
DBB3000 Start posi‐
tioning axis
DBB3001 -
DBB3002 Automatic
gear selec‐
tion
DBB3003 Indexing
position
DBD3004
DBD3008
The bits of the distance conditions and the direction of rotation definition define the particular
positioning or traversing mode, only one of the bits must be set:
Meaning
Positioning absolute
Positioning incremental
Positioning shortest distance
Positioning absolute, positive approach direction
Positioning absolute, negative approach direction
Direction of rotation as for M4
The remaining bits are used to specify and start the particular function, these function bits as
well as position and velocity are explained in more detail for the individual functions.
Signals from PLC axis
DB3900...3907
Data block
Byte Bit 7
DBB3000 Positioning
axes active
DBB3001 -
DBB3002 -
DBB3003
1126
Signals to PLC axis [r/w]
Bit 6 Bit 5
Start spin‐ Start spin‐
dle posi‐ dle rotation
tioning
- Stop spin‐
dle rotation
Constant Direction of
cutting rate rotation as
for M4
- -
Position (REAL, with indexing axis: DINT)
Feedrate velocity (REAL), if < 0, the value is taken from machine data POS_AX_VELO
Signals from PLC axis [r]
Bit 6 Bit 5
Position
reached
- -
- -
PLC → NCK interface
Bit 4 Bit 3
Start spin‐ -
dle oscilla‐
tion
Stop spin‐ -
dle oscilla‐
tion
- Handwheel
override
- -
Distance condition to be set
No mode bit set
DBB3002.0 = 1
DBB3002.1 = 1
DBB3003.1 = 1
DBB3003.0 = 1
DBB3002.5 = 1
PLC → NCK interface
Bit 4 Bit 3
- -
- -
- -
Error number
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Bit 2 Bit 1
- -
- -
Traversing Distance
dimension, condition,
inches (not shortest
metric) distance
(DC)
- Distance
condition,
abs. pos. di‐
rection
(ACP)
Bit 2 Bit 1
- Error while
traversing
- -
-
Bit 0
-
-
Distance
condition,
incremen‐
tal (IC))
Distance
condition,
abs. neg. di‐
rection
(ACN)
Bit 0
Axis cannot
be started
-
-
Basic Functions