Siemens SIMATIC ET 200SP Function Manual

Routing
10.3 IP forwarding
Communication
294 Function Manual, 11/2019, A5E03735815-AH
10.3 IP forwarding
Forwarding of IP packets with IP forwarding
IP forwarding is a function of devices to forward IP packets between two connected IP
subnets.
Enable/disable the IP forwarding function in STEP 7. When IP forwarding is enabled, the
S7-1500 CPU forwards received IP packets not addressed to the CPU to locally connected
IP subnets or to a configured router.
The following figure shows how a programming device accesses data of an HMI device.
Programming device and HMI device are located in different IP subnets. The IP subnets are
connected to the two interfaces X1 and X2 of the CPU.
Figure 10-6 Access of a programming device to an HMI via IP forwarding
Areas of application
● Easy access from the control level to the field level for configuration and parameter
assignment of field devices, e.g. via PDM or web browser
● Simplified integration of devices for remote access, e.g. for diagnostics during remote
maintenance or firmware update

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