Setpoint/actual value channels
Assignment of the
Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
In order to guarantee that the control runs up reliably, all machine axes are de-
clared as simulation axes (without hardware).
MD 30130: CTRLOUT_TYPE (setpoint output type) = 0
MD 30240: ENC_TYPE (actual-value acquisition mode) = 0
Traversing of the axes in servo mode is simulated without speed setpoint out-
put, and no hardware-specific alarms are output.
The machine data
MD 30350: SIMU_AX_VDI_OUTPUT (output of axis signals with simula-
can be used to select whether the interface signals of a simulation axis are
output at the PLC interface (e.g. during program test, if there is no drive hard-
For each machine axis that a drive is to be 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.
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 module.
In the two axis-specific machine data:
MD 30110: CTRLOUT_MODULE_NR (setpoint assignment: logic drive
MD 30220: ENC_MODUL_NR[n] (actual-value assignment: logic drive num-
must always be entered the same logic drive number m of the drive represent-
ing 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 Subsection
10.5.3, page 10-313).
Once the drive configuration and setpoint/actual value assignment have been
parameterized, an NCK reset must be executed to initiate a warm restart. After
the NC has powered up, the set configuration is effective.
10 NC Start-Up with HMI Advanced
10.5 Axes and spindles