Communication System Manual
3WN6 Circuit-Breakers
60
Copyright Siemens AG 1998. All rights reserved.
Version 1.0 (02/98)
3.5.2.3 Diagnostics
Diagnostic data are high-priority data. The interface module generates external diagnostics whenever
- the contact verifying the presence of circuit-breaker 3WN6 is not closed or
- the connection to 3WN6 is faulted.
Display of signals in external diagnostic byte (octet no. 8):
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
0
0
0
0
|
|
|
|
|
0:
1:
"Present" contact closed
"Present" contact open
0:
1:
Connection to 3WN6 OK
Connection to 3WN6 faulted
3.5.2.4 Data
An example program (software block) is provided for data transfer between the SIMATIC S5 CPU and
the 3WN6 circuit-breaker. This program can be parameterized user-specifically.
3.5.2.4.1 Input data (from 3WN6 to PROFIBUS, see example below)
The 6 words of input data are divided into the following data areas:
Octet 1
Parameter identifier
Octet 2
Profile control
Octet 3
Parameter subindex
for communication-capable
Octet 4
Reserved
low-voltage devices
Octet 5
on PROFIBUS-DP (kNS/DP)
Octet 6
Parameter value
Octet 7
Octet 8
Octet 9
High-order byte of status
word
Various signals
Octet 10
Low-order byte of status
word
See below
Octet 11
High-order byte of main
actual value
Current in highest loaded phase
Octet 12
Low-order byte of main
actual value
The data area from octet 1 to octet 8 is intended for acyclic request-driven data transfer. The cyclic
data with fixed assignments which are transferred in every message cycle are defined in octets 9 to12.
