Siemens SIMATIC NET S7-300 User Manual

5 Configuring Communication Connections
A-155
S7-CPs for Industrial Ethernet Configuring and Commissioning
Release 01/2007
C79000-G8976-C182-07
Figure 5-25 Configuring FETCH PASSIVE Based on the Example of an ISO Transport Connection
The connection can then only be used for this mode; sending or receiving with
the FCs AG_SEND/AG_LSEND or AG_RECV/AG_LRECV is then no longer
possible.
The connection is established passively; in other words, only the partner station
(SIMATIC S5 station, a PC station, or a non-SIMATIC station) can establish the
connection. The setting is made automatically in the “General” tab and cannot
be changed.
Notice
Remember that with this configuration on an S7-300, one connection resource
(free connection for S7 functions) of the S7-300 CPU is used. CPU connection
resources are also used, for example, by S7-300 CPs, in the FMS mode or by
PGs and OPs. For more detailed information about the maximum connection
resources, refer to /1/.
 SIMATIC PC Station: FETCH ACTIVE / WRITE ACTIVE
If you select the FETCH ACTIVE or WRITE ACTIVE mode for the ISO
transport connection, you can access the system areas on a SIMATIC S7 PLC
or a SIMATIC S5 station from the PC station.
The connection establishment is active; in other words, the partner station must
wait for connection establishment (passive connection establishment on the
partner).

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)