Siemens SIMATIC ET 200SP Function Manual

Communication
Function Manual, 11/2019, A5E03735815-AH
307
Connection resources
11
11.1 Connection resources of a station
Introduction
Some communications services require connections. Connections occupy resources in the
automation system (station). The connection resources are made available to the station by
the CPUs, communications processors (CPs) and communications modules (CMs).
Connection resources of a station
The connection resources available depend on the CPUs, CPs and CMs being used and
must not exceed a maximum number per station.
The maximum number of resources of a station is determined by the CPU.
Reserved connection resources
Each CPU has reserved connection resources for PG, HMI and Web server communication.
This ensures, for example, that a PG can always establish at least one online connection
with the CPU regardless of how many other communications services are already using
connection resources.
Dynamic connection resources
In addition, dynamic resources exist. The difference between the maximum number of
connection resources and the number of reserved connection resources is the maximum
number of dynamic connection resources.
The communication services PG Communication, HMI Communication, S7 Communication,
Open User Communication, Web Communication, OPC UA Client/Server Communication
and other communication from the pool of dynamic connection resources are used.

Siemens SIMATIC ET 200SP Specifications

General

System Type	Distributed I/O System
Mounting	DIN Rail
Communication Protocol	PROFINET, PROFIBUS
IP Rating	IP20
Category	I/O Systems
Supply Voltage	24 V DC
Modularity	Yes
Hot Swapping	Yes
Storage Temperature	-40°C to +70°C
Digital Inputs	Yes
Digital Outputs	Yes
Analog Inputs	Yes
Analog Outputs	Yes
Communication Interface	PROFINET, PROFIBUS
Number of Modules	Up to 64
Relative Humidity	5 to 95% (non-condensing)
Operating Temperature	-25°C to +60°C