Siemens SIMATIC NET S7-300 Manual page 164

6 Programmed Communication Connections
6.3 Configuration Data Block
Meaning
The configuration data block (CONF_DB) contains all the connection data and
configuration data (IP address, subnet mask, default router, NTP time server and
other parameters) for an Ethernet CP. The configuration data block is transferred
to the CP with function block FB55.
Block and Data Structure
The graphic below shows the following:
S Structure resulting from parameter fields and subfields
- The connections and specific system data are is described by an identically
structured parameter field.
- Individual parameters are characterized by subfields.
S Offset range
The CONF_DB can start at any point within a data block as specified by an
offset range.
Configuration data
block
Offset range 0..n
CONF_DB
DB identifier
System data for CP
Connection 1
Connection 2
Connection n *)
A -164
Parameter field for system data (CP
networking) and connections
Type
ID (for system data = 0)
Number of subfields
Subfield 1
Subfield 2
Subfield n
Parameter fields are
described below in
Sections 6.4 and 6.5
S7-CPs for Industrial Ethernet Configuring and Commissioning
Subfield
Individual
parameters
Subfield types are
described below in
Section 6.6
Release 01/2007
C79000-G8976-C182-07