Siemens SIMATIC NET S7-300 User Manual

5 Configuring Communication Connections
A-133
S7-CPs for Industrial Ethernet Configuring and Commissioning
Release 01/2007
C79000-G8976-C182-07
Attributes Description Access
Local Endpoint
ID The entry is identical to the Local ID parameter in the
connection table.
Selectable
Name When you create the connection, a name is proposed here
along with a connection number as suffix.
With unspecified connections, use this box to identify the
partner.
Modifiable
Via CP If the station contains more than one CP of the same type
connected to the same subnet, you can select the connection
route -> “Route”, see Section 5.9.
If no CP is assigned (for example because the CP has been
deleted) “none” is displayed here.
Display only
Active Connection
Establishment
With this option, you specify whether the connection is
established by this S7 station. This is the default setting when
the address of the partner is specified.
If you selected partner “unspecified” when you created the
connection, the option is deselected as default. If you activate
the option, you must also specify the address of the partner in
the “Addresses” tab.
ON: the connection is established actively.
OFF: the connection is established by the partner.
Modifiable
Use for FTP protocol Selecting the option has the following effects:
 The TCP connection is now used as an FTP connection.
 ”Addresses” tab: The addresses are specified automatically
(Port=21)
 ”Options” tab: The mode is set permanently to FTP.
 The ”Active connection establishment” option is irrelevant
and cannot be set.
Configuration limits: see /2/
Precondition: The option can only be selected for an
unspecified TCP connection.
Modifiable
Block Parameters
ID This value must be entered as a block call parameter ID for
calling the FC in the user program to identify the connection.
The ID changes if the local ID is changed.
Display only
LADDR This value must be entered as a block call parameter ID for
calling the FC in the user program to identify the connection.
Display only

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)