Siemens SINAMICS S120 - Page 105

Communication via PROFIBUS
Cyclic communication
4-105
E Siemens AG, 2004. All rights reserved
SINAMICS S120 Installation and Start-Up Manual, 12/04 Edition
STW2 (status word 2)
See function diagram [2454].
Table 4-9 Description of STW2 (status word 2)
Bit
Meaning Comments BICO
0 DDS eff., bit 0 - Drive data set effective (5-bit counter) r0051.0
1 DDS eff., bit 1 -
For more information about data sets, see
Section 7 2
r0051.1
2 DDS eff., bit 2 -
S
ec
ti
on
7
.
2
.
r0051.2
3 DDS eff., bit 3 - r0051.3
4 DDS eff., bit 4 - r0051.4
5...7 Reserved - - -
8
Travel to fixed stop
1 Travel to fixed stop
BO:
8 Travel to fixed stop
0 No travel to fixed stop
BO:
p1406.8
9
10
11
Reserved - - -
12 Slave sign-of-life bit 0 -
Implicitly
13 Slave sign-of-life bit 1 -
User data integrity (4 bit counter)
Implicitly
interconne
14 Slave sign-of-life bit 2 -
User data integrity (4-bit counter)
interconne
cted-
15 Slave sign-of-life bit 3 -
NACT_A (actual speed value A (16-bit))
S Actual speed value with 16-bit resolution
S The actual speed value is normalized in the same way as the setpoint (see
NSETP_A).
NACT_B (actual speed value B (32-bit))
S Actual speed value with 32-bit resolution
S The actual speed value is normalized in the same way as the setpoint (see
NSETP_B).
Gn_STW (encoder n status word)
Gn_XACT1 (encoder n actual position value 1)
Gn_XACT2 (encoder n actual position value 2)
This process data belongs to the encoder interface and is described in Subsec-
tion 4.3.4.