Siemens SIMATIC NET S7-300 User Manual

6 Programmed Communication Connections
A-164
S7-CPs for Industrial Ethernet Configuring and Commissioning
Release 01/2007
C79000-G8976-C182-07
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:
 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.
 Offset range
The CONF_DB can start at any point within a data block as specified by an
offset range.
Configuration data
block
Connection 1
Connection n *)
Connection 2
System data for CP
DB identifier
Parameter field for system data (CP
networking) and connections
Subfield 1
Subfield n
Subfield 2
ID (for system data = 0)
Type
Number of subfields
Individual
parameters
Subfield
Offset range 0..n
CONF_DB
Subfield types are
described below in
Section 6.6
Parameter fields are
described below in
Sections 6.4 and 6.5

Siemens SIMATIC NET S7-300 Specifications

General

Product Type Designation	SIMATIC NET S7-300
Mounting	DIN rail mounting
Protection Class	IP20
CPU Models	Various models available (e.g., CPU 312, CPU 314)
Communication Interfaces	MPI, PROFIBUS DP
Power Supply	24 V DC power supply required. Different power supply modules available.
I/O Modules	Digital input modules, digital output modules, analog input modules, analog output modules
Programming	STEP 7 software
Supply Voltage	24V DC or 120/230V AC (depending on model)
Digital Inputs	Available via digital input modules
Digital Outputs	Available via digital output modules
Analog Inputs	Available via analog input modules
Analog Outputs	Available via analog output modules
Communication Functions	MPI, PROFIBUS DP, Ethernet (depending on model)
Protocols	MPI, PROFIBUS DP, TCP/IP (depending on model)
Operating Temperature	0°C to 60°C
Storage Temperature	70 °C
Memory	Depends on CPU model (e.g., 32 KB to 1.5 MB)