Siemens SIMATIC NET S7-300 User Manual

5 Configuring Communication Connections
A-117
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 for the
connection endpoint 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”
button see Section 5.9.
If no CP is assigned (for example because the CP was previously
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.
ON: the connection is established actively.
OFF: the connection is established by the partner.
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.
Note:
Please note the effects on the mode. If you want to use the FETCH
or WRITE mode (refer to the ”Options” tab), the mode must be set to
”Passive” for the S7 station.
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
Connection Name (Reference) - Only in Multiproject
If you create a connection to a partner in another project that has not yet been
merged with the current multiproject, you must specify a connection name as a
reference (not to be confused with the name of the connection endpoint described
above). Interproject connections can then be joined up based on this reference. As
soon as the connections have been joined, the connection name (reference) is no
longer relevant and is no longer displayed.

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)