Siemens Sinumerik 840D Series Function Manual

10.03
4.10Position measuring system
4-141
 Siemens AG, 2003. All rights reserved
SINUMERIK 840D/SIMODRIVE 611 digital, HLA Module (FBHLA) - 10.03 Edition
The minimum or maximum possible velocity depends on the position measuring
system.
S V
max
: of the position measuring system must not be exceeded.
The maximum measuring velocity must be set in MD 5609:
ENC_SPEED_LIMIT (see Subsection 4.13.1).
V
max
must not exceed the 350 kHz bar frequency of the connected measur-
ing system.
V
max,bar
=scale graduation @ 350000 s
-1
S V
min
: The number of crossed graduations per velocity controller cycle is
small at low velocities. In extreme cases, this can result in uneven move-
ments at low velocities, large scale graduation and short velocity controller
cycle.
Solution: Select another position measuring system with smaller
scale graduations or increase the velocity controller cycle.
A phase error on tracks A and B can be corrected with the phase error com-
pensation function.
5008 ENC_PHASE_ERROR_CORRECTION Cross reference: -
Encoder phase error compensation
Related to:
HLA
Protection level:
3/3
Unit:
Degrees
Default:
0.0
Minimum:
-20.0
Maximum:
20.0
Data type:
FLOAT
Active:
Immediately
5011 ACTUAL_VALUE_CONFIG Cross reference: -
Actual-value sensing configuration
Bit 0= 0: No inversion
1: Actual value inversion
Bit 1= 0: No phase error compensation activated
1: Phase error compensation activated
Bit 3= 0: No absolute value encoder
1: Absolute value encoder (EnDat or SSI encoder)
Bit 4= 0: Rotary measuring system
1: Linear or rotary measuring system
Bit7= 0: No distance-coded measuring system
1: Distance-coded measuring system
Bit 8= 0: No zero marker selection by NC
1: Zero marker selection by NC
Bit 14=0: 100 kHz data transfer rate (absolute value encoder)
1: 500 kHz data transfer rate (absolute value encoder)
Related to:
HLA
Protection level:
3/3
Unit:
HEX
Default:
0
Minimum:
0
Maximum:
65535
Data type:
UNS.WORD
Active:
Power On
Minimum and
maximum
velocity
Phase error
compensation
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