Actual-Value Resolution; Machine Data Of The Actual Value Resolution - Siemens SINUMERIK 840D Function Manual

G2: Velocities, setpoint / actual value systems, closed-loop control
2.4 Setpoint/actual-value system
Encoder-dependent machine data: $MA_
MD30210 ENC_SEGMENT_NR[ n ]
MD30220 ENC_MODULE_NR[ n ]
MD30230 ENC_INPUT_NR[ n ]
MD30240 ENC_TYPE[ n ]
MD30242 ENC_IS_INDEPENDENT[ n ]
MD30244 ENC_MEAS_TYPE[ n ]
MD30250 ACT_POS_ABS[ n ]
MD30260 ABS_INC_RATIO[ n ]
MD30270 ENC_ABS_BUFFERING[ n ]
MD34090 $MA_REFP_MOVE_DIST_CORR[ n ]
MD34320 $MA_ENC_INVERS[ n ]
n: Encoder index, with n = 0, 1, ... (1st encoder, 2nd encoder, ...)
Note
The "Activate machine data" can be activated either in the part program with the
command NEWCONF or via the user interface by pressing a softkey.
2.4.6

Actual-value resolution

2.4.6.1

Machine data of the actual value resolution

Depending where the measuring system (encoder) is mounted, the following measuring
system types should be taken into account:
● Load-side encoder: Direct measuring system (DM)
● Motor-side encoder: Indirect measuring system (IM)
60
Meaning
Actual value assignment: Number of bus
segments
Actual value assignment: Drive number/
measuring circuit number
Actual value assignment: Input on drive
module/measuring circuit module
Encoder type of the actual value acquisition
(actual position value)
Encoder is independent
Encoder measuring type
Internal encoder position
Absolute encoder: Ratio between the abso‐
lute resolution and the incremental resolu‐
tion
Absolute encoder: Traversing range exten‐
sion
Reference point offset
Length measuring system is in the opposite
sense
Function Manual, 06/2019, A5E47437747B AA
Axes and spindles