Parameterization Of Absolute Measuring Systems (Endat Interface) - Siemens SINUMERIK FM-NC Installation And Startup Manual

03.96
6.9.6 Parameterization of absolute measuring systems
(EnDat interface)
Precondition
In order to adapt the absolute encoder to the real data of the machine, the en-
coder must be matched in a similar fashion to a rotary or linear incremental en-
coder.
The following additional axis machine data must be noted with respect to abso-
lute encoders:
Table 6-13 Axis machine data for absolute encoders
MD
1005: ENC_RESOL_MOTOR
1007: ENC_RESOL_DIRECT
1011: ACTUAL_VALUE_CONFIG
1030: ACTUAL_VALUE_CON-
FIG_DIRECT
34200: ENC_REEP_MODE [n]:
0...max. no. encoders -1
34220: ENC_ABS_TURNS_MO-
DULO [n]: 0...max. no. encoders -1
*)
Measuring system parameter has been set automatically after motor selection.
Setting up the
To set up the encoder, the offset between the machine zero and the absolute
absolute encoder encoder zero is determined and stored in the SRAM of the NC module.
The adjusted state is identified by the control through MD 34210:
ENC_REFP_STATE = 2.
References:
Readjustment
The absolute encoder must be set once the axes are ready to traverse during
machine start-up. However, it may also be necessary to re-adjust the encoder at
a later point in time, e.g.
S
S
S
S
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SINUMERIK 840D Installation and Start-Up Guide (IAD) – 04.00 Edition
6 Assigning Parameters to the Control and the PLC Program
Rotary absolute encoder
Mounted on motor
Marks/rev.
(2048 on standard motor)
*)
–
*)
Bit 3
–
0
Multiturn resolution
(4096 on standard motor)
/FB/, R1, "Reference Point Approach"
after dismantling/installing the encoder or the motor with absolute encoder
or,
generally: if the mechanical connection between the encoder and the load
has been separated and an unacceptable deviation remains when the two
are joined together again, or
if data are lost in the NC SRAM, battery voltage failure, PRESET,
after gear stage changeover between load and absolute encoder the setting
in MD 34210: ENC_REFP_STATE is deleted.
6.9 Axes and spindles
Linear absolute en-
Mounted on machine Mounted on machine
– –
Marks/rev. Scale graduations in [nm]
– –
Bit 3 Bit 3 + Bit 4
0 0
Multiturn resolution –
coder
6-121
6