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

G2: Velocities, setpoint / actual value systems, closed-loop control
7.4 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, etc.)
Note
Machine data with NEWCONFIG effectiveness criterion can be activated either in the part
program with the command NEWCONF or via the user interface by pressing a softkey.
7.4.6

Actual-value resolution

7.4.6.1

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)
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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 sensing
(position actual 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, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions