Siemens Sinamics S120 Function Manual page 561

Bit Name
14 Parking encoder
15 Encoder fault
Encoder 1 actual position value 1 (G1_XIST1)
● Resolution: Encoder lines ∙ 2n
● Used to transmit the cyclic actual position value to the controller.
● The transmitted value is a relative, free-running actual value.
● Any overflows must be evaluated by the master controller.
● Encoder lines of incremental encoder
● 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.
Encoder 1 actual position value 2 (G1_XIST2)
Different values are entered in Gx_XIST2 depending on the function.
● Priorities for Gx_XIST2
The following priorities should be considered for values in Gx_XIST2:
Drive functions
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
Signal status, description
1
0
1
0
n: fine resolution, no. of bits for internal multiplication
The fine resolution is specified via p0418.
Figure 10-10 Subdivision and settings for Gx_XIST1
– For encoders with sin/cos 1Vpp:
Encoder lines = no. of sinusoidal signal periods
10.1 Communication according to PROFIdrive
Parking encoder active (i.e. parking encoder switched off)
No active parking encoder
Error from encoder or actual-value sensing is active.
Note:
The error code is stored in Gn_XIST2.
No error is active.
Communication
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