Siemens SINAMICS S120 - Page 119

Communication via PROFIBUS
Cyclic communication
4-119
E Siemens AG, 2004. All rights reserved
SINAMICS S120 Installation and Start-Up Manual, 12/04 Edition
Encoder 1 actual position value 2 (G1_XACT2)
Different values are entered in Gx_XACT2 depending on the function (see
Fig. 4-13).
S Priorities for Gx_XACT2
The following priorities should be considered for values in Gx_XACT2:
Gx_STW.14 = 1?
Gx_XACT2
= error code (see
Table 4-15)
Gx_XACT2
= requested value
(p0418)
Yes
No
Yes
No
Yes
No
Yes
No
Gx_XACT2 = 0
Gx_STW.13 = 1
Gx_STW.4 = 1
or .5 = 1
or .6 = 1
or .7 = 1
Gx_STW.15 = 1?
Parking encoder?
Encoder error?
“Find reference marker”
or “Measurement
on-the-fly” selected?
Transmit absolute
value cyclically?
Gx_XACT2
= absolute value
(p0419)
Fig. 4-13 Priorities for functions and Gx_XACT2
S Resolution: encoder lines S 2
n
n: fine resolution, no. of bits for internal multiplication