Siemens SINAMICS S120 - Page 101

Communication via PROFIBUS
Cyclic communication
4-101
E Siemens AG, 2004. All rights reserved
SINAMICS S120 Installation and Start-Up Manual, 12/04 Edition
A_CTW1 (control word for B_INF)
See function diagram [8720].
Table 4-6 Description of A_CTW1 (control word for B_INF)
Bit
Meaning Comments BICO
0/1
ON
Pulse enable possible
0 ON/OFF1
0
OFF1
Reduce DC link voltage via ramp (p3566), then
pulse inhibit/line contactor open
BI: p0840
1
No OFF2
Enable possible
1
OFF2
0
OFF2
Immediate pulse cancellation and power-on
inhibit
BI: p0844
Note:
Control signal OFF2 is generated by ANDing BI: p0844 and BI: p0845.
2
3
4
Reserved - - -
5
6
Acknowledge error 0/1 Acknowledge error BI: p2103
7 Note:
Acknowledgement takes place at a 0/1 edge via BI: p2103 or BI: p2104 or BI: p2105.
8
9
Reserved - - -
Controlled by PLC
1
Controlled by PLC
This signal must be set so that the process data
transferred from the PROFIBUS master to the
slave is accepted and activated.
BI: p0854
10
Controlled by PLC
0
Not controlled by PLC
The process data transferred from the
PROFIBUS master are discarded by the slave,
i.e. they are assumed to be zero.
BI: p0854
Note:
This bit should not be set to “1” until the PROFIBUS slave has returned an appropriate status via
STW1.9 = “1”.
11
12
13
14
15
Reserved - - -