Siemens SINAMICS DCM Manual page 403

Descriptions of functions
10.3 Communication according to PROFIdrive
Bit Name
12 Reserved
13 Transmit absolute value cycli-
cally
14 Parking encoder
15 Encoder fault
Encoder 1 actual position value 1 (G1_XIST1)
● Resolution: Encoder lines ∙ 2n
n: Fine resolution, no. of bits for internal multiplication
The fine resolution is specified via p0418.
● Used to transfer the cyclic actual position value to the controller.
● The transferred value is a relative, free-running actual value.
● Any overflows must be evaluated by the master controller.
Figure 10-6
● Encoder lines of incremental encoder
– For encoders with sin/cos 1Vpp:
● After power-up: Gx_XIST1 = 0
● An overflow in Gx_XIST1 must be viewed by the master controller.
● There is no modulo interpretation of Gx_XIST1 in the drive.
404
Signal status, description
-
1 Acknowledgement for Gn_STW.13 (request absolute value cyclically)
Note:
Cyclic transmission of the absolute value can be interrupted by a function
with higher priority.
See Gn_XIST2
•
0 No acknowledgement
1 Parking encoder active (i.e. parking encoder switched off)
0 No active parking encoder
1 Error from encoder or actual-value sensing is active.
Note:
The error code is stored in Gn_XIST2.
0 No error is active.
Subdivision and settings for Gx_XIST1
Encoder lines = no. of sinusoidal signal periods
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SINAMICS DCM DC Converter
Operating Instructions, 02.2015, A5E34763375/RS-AA/001