Siemens SINUMERIK 840D sl Commissioning Manual page 223

5. Mark the next selection box for the "Actual value: Encoder → axis" and assign a measuring
system in accordance with the table below.
6. Select the drive object from "NC drive number": The associated I/O address from the PLC
configuring is then displayed automatically.
7. Click "OK" to confirm the assignment and write the data.
Encoder selection and assignment
The assignment of an axis to a drive is called setpoint assignment; the assignment of an
encoder to an axis is called actual value assignment. The assignments are described below. A
setpoint assignment (axis → drive) without encoder assignment is permitted because not all
axes require encoders, e.g. spindles. The encoders are assigned automatically if they have
already been configured for the drive and are transferred in the telegram.
The tables show which SINAMICS encoders are supported by which telegram:
Message
frames
Encoder 1
Encoder 2
Message
frames
Encoder 1
Encoder 2
The numbers in the lines for encoder 1 / encoder 2 indicate the running number of the encoder
on the SINAMICS drive. This number is transferred in the selected telegram to the NC and
assigned to the axis as encoder 1 or encoder 2.
The telegrams in MD13060 $MN_DRIVE_TELEGRAM_TYPE are preassigned with the values
from the HW Config. This preassignment is set correspondingly for the assignment of the drive
CNC Commissioning: NC, PLC, Drive
Commissioning Manual, 12/2019, A5E48312804B AA
(1 / 2) 3 4
-- 1 1
-- -- 2
106 107 116
1 1 1
2 3 2
Communication between the NC and the drive
5 6 102
1 1 1
-- 2 --
118 136/146 138/148
2 1
3 2
7.5 Drives: Assign axis
103 104 105
1 1 1
2 3 --
139/149 166
2 1 1
3 -- 2
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