Time Stamp Correction Value - Siemens SIMOTION Function Manual

Field/button
Input (global measuring
input)
Measuring input number
(local measuring input)
Monitor current status
(measurement once)
Activation time of the
measuring range on
measuring input
5.3.4.2

Time stamp correction value

When measuring with measuring inputs, the following should be taken into account when
calculating the measurement positions from the measurement result and actual position of
axis / external encoder:
● the filter time constant setting on the measuring input (e.g. TM17 smoothing filter),
● the delay times in the transmission section and sensors and
● with global measuring inputs also the Ti setting on axis / external encoder (depending on
The hardware delay times on the measuring inputs can be found in the Manuals and can
usually be ignored for values of much less than 125 µs (e.g. with SIMOTION D, SINAMICS
Control Units, SIMOTION C240))
If the filter time can be parameterized for the hardware used (e.g. TM17 high feature: 1 µs or
125 µs), set the smallest possible value for the measuring inputs.
The delay times up to the measuring input, due to the transmission line and sensor technology,
depend on the components used and are usually unknown. If these values are small, they can
also be ignored.
With the setting "actual value reference - reference to the actual value at the encoder," the
transmission time Ti of the system is considered. With the other settings, you must also
consider the transmission time Ti for "global" measuring inputs. The value can be found in the
properties of the SINAMICS drive unit in the HW Config.
Example of how to proceed:
Output Cams and Measuring Inputs
Function Manual, 04/2014
Meaning/information
The output can be symbolically assigned via the assignment dialog using the
Input field (symbolic assignment is activated by default in the project as of V4.2).
For more details, see cam output types. (Page 22)
If symbolic assignment is not active or if the CPU version < V4.2, a physical output is assigned
by entering the HW address and bit number in the Input field. The logical HW address must be
located outside the process image and therefore be greater than 63.
Enter the measuring input at the drive of the axis here. One input can be assigned to several
measuring inputs. Input 1 is the default setting.
If the checkbox is activated, short pulses (short position control cycle clock) will be suppressed
at the measuring input. If the measuring input is activated, provided that rising edge is selected
under Edge, the measuring input will only be activated when the measuring input was at signal
status 0 for at least one position control cycle clock.
Enter an activation time, in seconds, for the activation and deactivation of the measuring range
here. With this time, you can compensate, for example, the runtimes during activation via
PROFIBUS and drive. The accuracy of the activation depends on the position control cycle clock.
Button for opening the assignment dialog. Select a parameter or an address in the Assign dialog.
Displays whether offline data or online data is shown
● Blue field = offline display
● Yellow field = online display
the actual value reference setting)
5.3 Configuring the Measuring Input technology object
Measuring Input TO - Part III
button in the
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