Siemens SINAMICS S120 Installation And Start-Up Manual page 96

Communication via PROFIBUS
Cyclic communication
Table 4-4 Description of CTW2 (control word 2)
Bit Meaning
0 Drive data set selection
DDS bit 0
Drive data set selection
1
DDS bit 1
2 Drive data set selection
DDS bit 2
3 Drive data set selection
DDS bit 3
4 Drive data set selection
DDS bit 4
5...7 Reserved
8 8 Travel to fixed stop Travel to fixed stop
9
10 Reserved
11
12 Master sign-of-life bit 0
13 Master sign-of-life bit 1
14 Master sign-of-life bit 2
15 Master sign-of-life bit 3
NSETP_A (speed setpoint A (16-bit))
S Speed setpoint with a 16-bit resolution with sign bit.
S Bit 15 determines the sign of the setpoint:
– Bit = 0 –> positive setpoint
– Bit = 1 –> negative setpoint
S The speed is normalized via p2000.
NSETP_A = 4000 hex or 16384 dec 8 speed in p2000
4-96
Comments
- Drive data set selection (5-bit counter)
For more information about data sets, see For more information about data sets, see
Section 7.2.
-
-
-
-
Select "Travel to fixed stop"
1
The signal must be set before the fixed stop is
reached.
Deselect "Travel to fixed stop".
1/0
The edge is necessary in order to move away
from the fixed stop, i.e. upon direction reversal.
– –
–
–
User data integrity (4-bit counter) User data integrity (4 bit counter)
–
–
SINAMICS S120 Installation and Start-Up Manual, 12/04 Edition
p0820[0]
p0821[0]
p0822[0]
p0823[0]
p0824[0]
BI: p1545 BI: p1545
–
CI: p2045 CI: p2045
E Siemens AG, 2004. All rights reserved
BICO