Siemens SINUMERIK 840D sl Commissioning Manual page 328

Fundamentals
15.7 Axis data
Assignment of the setpoint/actual value channels
For each machine axis to which a drive is assigned,
● a setpoint channel and
● at least one actual-value channel
must be parameterized.
A second actual-value channel can be set up as an option.
NOTICE
The motor measuring system is always used for the speed control function. Motor and
motor measuring system must therefore always be connected to the same drive (SERVO).
In the two axis-specific machine data:
● MD30110 CTRLOUT_MODULE_NR[0] (setpoint assignment: logical drive number)
● MD30220 ENC_MODUL_NR[n] (actual value assignment: logical drive number)
the index m for the DRIVE_LOGC_ADRESS of the drive is entered, which represents the
machine axis.
The entered value m refers to the drive whose I/O address is defined under the index n = (m-
1) in MD13050 DRIVE_LOGIC_ADDRESS[n] (see Chapter "Drive Configuration").
NCK Reset
Once the drive configuration and setpoint/actual value assignment have been
parameterized, an NCK reset must be executed to initiate a warm restart of the NC. After the
NC has powered up, the set configuration is effective.
Measuring system switchover
The interface signals
● DB31, ... DBX1.5 (position measuring system 1 selected)
● DB31, ... DBX1.6 (position measuring system 2 selected)
can be used to switch from the PLC between the two position measuring systems of a
machine axis.
Literature
Function Manual Basic Functions; Diverse Interface Signals
328
Commissioning Manual, 07/2007, 6FC5397-2AP10-3BA0
IBN CNC: NCK, PLC, drive