Zero Mark Emulation - Siemens Sinamics S120 Function Manual

Basic functions
6.22 Terminal Module 41
The zero mark signal for the TM41 is generated from the zero position of the leading
encoder. Parameters p0493, p0494 and p0495 apply to the generation of the zero position of
the leading encoder.
Special features
● PROFIdrive telegram 3
● Deadtime compensation (p4421)
● The pulse number ratio between the encoder to be emulated and the emulating TM41
● Only one Encoder Data Set (EDS) can be interconnected to precisely one TM41.
● When the same EDS is interconnected to an additional TM41, only the position actual
● A TM41 can neither emulate the zero mark position nor emulate the position actual value
● A TM41 cannot use external zero marks of the encoder to be emulated.
● Using p4401.1 = 1, the zero position is synchronized with the zero mark of the absolute
6.22.3

Zero mark emulation

For determining the zero mark position for zero mark emulation of the TM41, all referencing
modes that are permissible via the encoder interface of the drive object can be used. The
TM41 then uses the same mode parameterized in the drive object.
Possible referencing modes include e.g.:
● Referencing to the zero position of the encoder
● Referencing to the zero position of the encoder with selection of the correct zero position
302
can be set. For each encoder revolution, in the encoder emulation, more or fewer pulses
are output than were read-in from the original encoder.
value can be emulated – but not the zero mark position.
of another TM41.
encoder. If you have to remain compatible with older firmware versions, for example for
use in an existing control system, set parameter p4401.1 = 0.
– p4401.1 = 0: No synchronous zero marks
– p4401.1 = 1: Zero mark synchronization enabled
– As soon as the absolute encoder passes the zero position of the absolute position,
then the zero pulse is output via X520.
– Encoder zero mark of an incremental encoder
– Zero point of the singleturn position of an absolute encoder
– Pole pitch of the resolver
using a BERO switching signal (CU - parameter p0493)
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
Drive functions