Siemens SINAMICS S120 Function Manual page 376

Communication PROFIBUS DP/PROFINET IO
10.1 Communications according to PROFIdrive
Table 10-18 Description of the individual signals in Gn_STW
Bit Name
0 Find reference
mark or flying
1
measurement
2
3
4
5
6
7
0... Reserved
12
13 Request cyclic absolute value
14 Parking encoder
15 Acknowledge encoder error
376
Functions If bit 7 = 0, then find reference mark request applies:
Bit Meaning
0 Function 1
1 Function 2
2 Function 3
3 Function 4
If bit 7 = 1, then find flying measurement request applies:
0 Function 1
1 Function 2
2 Function 3
3 Function 4
Note:
Bit x = 1
•
Bit x = 0
The following applies if more than 1 function is activated:
•
The values for all functions cannot be read until each activated function
has terminated and this has been confirmed in the corresponding status
bit (STW.0/.1/.2/.3 "0" signal again).
Find reference mark
•
It is possible to search for a reference marker.
Equivalent zero mark
•
On-the-fly measurement
•
Positive and negative edge can be activated simultaneously.
Command Bit 6, 5, 4
(x: function selected via bit 0-3)
Mode 1 Measurement on-the-fly (fine resolution via p0418)
0 Find reference marker (fine resolution via p0418)
-
1 Request cyclic transmission of the absolute position actual value in
Gn_XIST2.
Used for (e.g.):
•
•
0 No request
1 Request parking encoder (handshake with Gn_ZSW bit 14)
0 No request
0/1 Request to reset encoder errors
Signal status, description
Reference mark 1
Reference mark 2
Reference mark 3
Reference mark 4
Probe 1 rising edge
Probe 2 falling edge
Probe 3 rising edge
Probe 4 falling edge
Request function
Do not request function
Meaning
000 -
001 Activate function x
010 Read value x
011 Terminate function
Additional measuring system monitoring
Synchronization during ramp-up
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
Drive Functions