Siemens SIMATIC NET S7-300 - Page 309

E Linking to Other Systems with FETCH/WRITE
A-309
S7-CPs for Industrial Ethernet Configuring and Commissioning
Release 01/2007
C79000-G8976-C182-07
Parameter Values
S7 Address Area
DB
M
I Q
ORG ID 01
H
02
H
03
H
04
H
Source/dest.
data from/to
data block in
main memory
Source/dest.
data from/to
flag area
Source/dest.
data from/to
process
image of the
inputs (PII)
Source/dest.
data from/to
process
image of the
outputs (PIQ)
DBNR DB, from
which the
source data
are taken or
to which the
dest data are
transferred
irrelevant irrelevant irrelevant
permitted range 1...255
Start address DW number,
from which
the data are
taken or
written to
Flag byte no.,
from which
the data are
taken or
written to
Input byte no.,
from which
the data are
taken or
written to
Output byte
no., from
which the
data are
taken or
written to
permitted range 0...2047 0...255 0...127 0...127
Length Length of the
source/dest.
data field in
words
Length of the
source/dest.
data field in
bytes
Length of the
source/dest.
data field in
bytes
Length of the
source/dest.
data field in
bytes
permitted range 1...2048 1...256 1...128 1...128