Siemens SINAMICS S150 NEMA, Operating Instructions Manual, Page: 592 / 862

Functions, monitoring and protective functions
9.3 Drive functions
Enclosed Drives
590
Operating Instructions, 12/2018, A5E36652151A
The track monitoring is activated with p0405.2 = 1.
If you selected your encoder from the list of parameter p0400, then the values above are
pre-selected and cannot be changed (also refer to the information on p0400 in the List
Manual).
Deactivating track monitoring
With activated encoder track monitoring, the function can be deactivated by setting
p0437.26 = 1.
Evaluating messages
All of the track monitoring functions can be individually evaluated. You can use both HTL as
well as TTL encoders.
If a fault is detected, fault F3x117
1)
"Inversion signal A/B/R incorrect" is output. The faulted
tracks are included in the fault value bit-coded.
1)
x = encoder number (x = 1, 2 or 3)
9.3.25.3 Zero mark tolerance
This function allows individual faults to be tolerated regarding the number of encoder pulses
between two zero marks.
Commissioning
The "Zero mark tolerance" is activated with p0430.21 = 1.
The permissible tolerance in encoder pulses for the zero mark distance is set using p4680.
Principle of operation
The function runs as follows:
1.
The "zero mark tolerance" function starts to become effective after the 2nd zero mark has
been detected.
2. After this, if the number of track pulses between two zero marks does not match the
number of pulses configured in p4680 once, then alarms A3x400
1)
(alarm threshold, zero
mark distance error) and/or A3x401
1)
(alarm threshold, zero mark failed) are/is output.
3. The alarms are cleared if the next zero mark is received at the correct position.
4. However, if a new zero mark position error is identified, fault F3x100
1)
(zero mark
distance error) or F3x101
1)
(zero mark failed) is output.
1)
x = encoder number (x = 1, 2 or 3)