Siemens Sinumerik 840D Series Function Manual

10.03
4.10 Position measuring system
4-144
 Siemens AG, 2003. All rights reserved
SINUMERIK 840D/SIMODRIVE 611 digital, HLA Module (FBHLA) - 10.03 Edition
The length defines the total transferred message frame length including all par-
ity or alarm bits.
Example: 24 bits + 1 alarm bit; 25 must be entered.
Every encoder manufacturer has a different name for the alarm bit, e.g. Power
Failure Bit.
5040 PISTON_ZERO Cross reference: -
Piston zero in relation to machine zero Related to:
HLA
Protection level:
3/3
Unit:
mm
Default:
0.0
Minimum:
-1000000.0
Maximum:
100000.0
Data type:
FLOAT
Active:
Immediately
In the machine data 5040: between the piston zero (end stop at A end) and ma-
chine zero must be set in MD 5040: PISTON_ZERO.
If the actual position is available in machine coordinates in the drive after the
reference point approach, it can be applied to calculate the piston position (e.g.
for adaptation).
Actual position
value
4 Firmware Drive Functions

Siemens Sinumerik 840D Series Specifications

General

Axes	Up to 31 axes
Power Supply	24 V DC
Control Type	CNC
Interface	Ethernet, PROFIBUS
Display	TFT color display
PLC	Integrated PLC (programmable logic controller)
Operating Temperature	0°C to 45°C
Relative Humidity	Up to 95% (non-condensing)
Max. Number of Channels	Up to 10 channels