Siemens SIMATIC NET S7-300 User Manual

5 Configuring Communication Connections
A-121
S7-CPs for Industrial Ethernet Configuring and Commissioning
Release 01/2007
C79000-G8976-C182-07
5.4.3 Specifying ISO Transport Dynamic Properties
Dynamics Tab
The Dynamics tab displays the relevant timers and counters of this connection.
You can normally accept these default values.
If necessary, for example with connections to non-Simatic systems, you can set
the timers and counters individually and influence the dynamic response of the
connection.
Figure 5-9 Layout of the “Dynamics” Tab of the Properties Dialog
Attributes Description Access
Connection Establishment
Retransmission Time
The retransmission time specifies the interval after
which an unsuccessful connection establishment
attempt can be triggered again (1-60 s, default 5 s)
- if connection establishment is active
- if connection establishment is passive (-> irrelevant)
Modifiable
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Data Transfer
Retransmission time This parameter specifies the interval after which an
unsuccessful transmission attempt can be triggered
again (100-30000 ms, default 1000 ms).
Modifiable

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)