Siemens 3VF Series Communications Manual page 38

Communication System Manual
The 3WN6 cyclic data on PROFIBUS-DP are handled directly in bytes (octets) 9, 10, 11 and 12 of
the PLC I/O area. Specific message numbers are not required (see Fig. 9, page 38 and page 52).
OCTET
(Byte)
9 High-order byte
of status word
10 Low-order byte
of status word
11 High-order
byte of main
actual value
12 Low-order byte
of main actual
value
Fig. 9: Cyclic data transfer
Legend: Octet = Byte
(Bytes 5, 6, 7 and 8 are also referred to as octet strings = OS)
38
3WN6 cyclic output data
Various
signals
Current in
max. loaded
phase
© Copyright Siemens AG 1998. All rights reserved.
3WN6 Circuit-Breakers
3WN6 cyclic input data
High-order byte
of main control
word
Low-order byte
of main control
word
High-order byte Setting current
of main setpoint
Low-order byte
of main setpoint
Version1.0 (05/98)
Direct control
commands
I
r