4.14 SP
The "Safe Position (SP)" function enables you to
transfer safe position values to the F-CPU via
PROFIsafe (telegram 901 or 902).
From the position change over a specific time,
the F-PLC can also calculate the actual velocity.
In telegram 902, the values are transferred in 32-
bit format, in telegram 901, in 16-bit format.
The position actual value is not transferred in
PROFIsafe telegram 903, which is preset for
SINUMERIK.
See also: Overview of process data telegrams
(Page 207)
After parameter assignment, release and POWER ON, the function is automatically selected
and the values transferred. Please observe the following:
● For use as the safe absolute position, the "Absolute position" must also be enabled and then
safely referenced.
● In order that the transferred position can be used, the actual position value must be valid.
Using the time stamp that is also transferred, you can also calculate the velocity from the
position values. If you only want to calculate the velocity, it is sufficient to enable the "Transfer
of safe position values" without the "Absolute position."
4.14.1 Details and parameterization
The function "Transfer safe position values (SP)" enables you to transfer a safe position (i.e.
absolute or relative position) to the F-PLC via PROFIsafe. Transfer of the safe relative position
(Safe Position SP) can be used to calculate the safe speed in the F-PLC. Its use for safe
position monitoring is only permissible if the reference to the absolute position was established
at the control level. In this case, the "safely referenced" bit of SINAMICS S120 (r9722.23)
cannot be used.
Safety functions integrated in the drive
4.14 SP
Safety Integrated (with SINAMICS S120)
166 Commissioning Manual, 02/2020, A5E46305916B AB
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