Configuration Notes
With CIDR, there is no fixed assignment of an IP address to a network class and possible subnetting in other networks or supernetting of several networks in a class. There is only one network mask that splits the IP address into a network part and a host part.

The CIDR function (Classless Inter Domain Routing) thus includes subnetting and supernetting.

The following Industrial Ethernet CPs support the subnetting and supernetting functions:

• 6GK7343-1EX21-0XE0 as from FW V1.2
• 6GK7343-1EX30-0XE0
• 6GK7343-1GX21-0XE0 as from FW V1.1
• 6GK7343-1GX30-0XE0
• 6GK7343-1GX31-0XE0
• 6GK7343-1CX10-0XE0
• 6GK7343-1FX00-0XE0
• 6FL4343-1CX10-0XE0
• 6GK7443-1EX20-0XE0
• 6GK7443-1EX30-0XE0
• 6GK7443-1EX40-0XE0 as from FW V2.4
• 6GK7443-1EX41-0XE0
• 6GK7443-1GX20-0XE0
• 6GK7443-1GX30-0XE0

The following CPUs with integrated PROFINET interface support the subnetting and supernetting functions:

• IM151-8(F) PN/DP CPU
• IM154-8(F) CPU
• CPU314C-2 PN/DP
• CPU315(F)-2 PN/DP as from FW V2.3
• CPU317(F)-2 PN/DP as from FW V2.3
• CPU319(F)-3 PN/DP
• CPU412-2 PN
• CPU414(F)-3 PN/DP
• CPU416(F)-3 PN/DP
• CPU412-5H PN/DP
• CPU414-5H PN/DP
• CPU416-5H PN/DP
• CPU417-5H PN/DP
• S7-1200 CPUs as from FW V1.0

The following Industrial Ethernet PC modules support the subnetting and supernetting functions:

• CP1616 as from V2.0
• CP1604 as from V2.0
• CP1613 (A2) as from SW V7.1
• CP1623
• CP1628
• CP1612 and IE General

For the remaining Industrial Ethernet PC modules like CP1613 (A2) < SW V7.1, CP1604 V1, CP1616 V1 and CP1512 it is only possible to configure the "Subnetting" function. It is not possible to configure the "Supernetting" function for these modules in STEP 7 / NCM PC. This is prevented in STEP 7 / NCM PC by an error message (see Fig. 05).

In these modules that support the TCP/IP protocol it is possible to set both the IP address and the associated subnet mask in the hardware configuration of STEP 7. The IP address and associated subnet mask are entered in the Properties window of the CP's or CPU's Ethernet interface. After inserting the Industrial Ethernet CP or CPU with integrated PN interface in the hardware configuration, you are offered the following default settings (see Fig. 01) in the Properties window of the CP's or CPU's Ethernet interface.

• IP Address: 192.168.0.1
• Subnet mask: 255.255.255.0

Fig. 01: Properties window of a CP's Ethernet interface

If you wish to change these default settings for the IP address and subnet mask, you need information about the connection between classes of IP addresses and subnet masks. The following demonstrates the connection between classes of IP addresses and subnet masks.

Connection between class of the IP address and subnet mask
In principle there are 5 classes of IP addresses. These are the classes A to E. Each class has its own subnet mask. The connections are given in the table below.
 

Class	Class bits	IP address range	Subnet mask	Network share	Node share
A	0xxxxxxx	0.x.x.x - 127.x.x.x	255.0.0.0	1 byte	3 bytes
B	10xxxxxx	128.0.x.x - 191.255.x.x	255.255.0.0	2 bytes	2 bytes
C	110xxxxx	192.0.0.x - 223.255.255.x	255.255.255.0	3 bytes	1 byte
D	1110xxxx	224.0.0.0 - 239.255.255.255	---	Multicast addresses
E	1111xxxx	240.0.0.0 - 255.255.255.255	---	Reserved addresses (for future purposes)

Class A network
IP addresses from Class A begin with the bit sequence 0-...; for example, the IP address range lies between 0.x.x.x and 127.x.x.x.
The subnet mask identifies the range that includes the address information for identifying the subnet. In Class A networks the first byte, that is to say the first 8 bits, corresponds to the IP address of the subnet address. Thus Class A networks are defined by the following subnet mask: 255.0.0.0 = 1111 1111 0000 0000 0000 0000 0000 0000. The last three bytes (24 bits) of the IP address identify a node in this subnet.

The total number of Class A networks can be calculated as follows:

• 2^8-1-2 = 2⁷-2 = 126 networks (since the IP address always begins with the bit sequence 0-..., 0.0.0.0 and 127.0.0.0 are not permitted)

The number of computers in a Class A network can be calculated as follows:

• 2²⁴-2 = 16 777 214 computers (x.0.0.0 -> network address and x.255.255.255 -> broadcast address are not permitted)

Fig. 02: Class A network

Class B network
IP addresses from Class B begin with the bit sequence 1-0-... and the address range lies between 128.0.x.x and 191.255.x.x. In Class B networks the first two bytes, that is to say the first 16 bits correspond to the IP address of the subnet address. Thus Class B networks are defined by the following subnet mask: 255.255.0.0 = 1111 1111 1111 1111 0000 0000 0000 0000. The last two bytes (16 bits) identify a node in this subnet.

The total number of Class B networks can be calculated as follows:

• 2^16-2 = 2¹⁴ = 16384 networks (since the IP address always begins with the bit sequence 1-0...)

The number of computers in a Class B network can be calculated as follows:

• 2¹⁶-2 = 65534 computers (x.x.0.0 -> network address and x.x.255.255 -> broadcast address are not permitted)

Fig. 03: Class B network

Class C network
IP addresses from Class C begin with the bit sequence 1-1-0... and the address range lies between 192.0.0.x and 223.255.255.x. In Class C networks the first three bytes, that is to say the first 24 bits correspond to the IP address of the subnet address. Thus Class C networks are defined by the following subnet mask: 255.255.255.0 = 1111 1111 1111 1111 1111 1111 0000 0000. The last byte (8 bits) identifies a node in this subnet.

The total number of Class C networks can be calculated as follows:

• 2^24-3 = 2²¹ = 2 097 152 networks (since the IP address always begins with the bit sequence 1-1-0...)

The number of computers in a Class C network can be calculated as follows:

• 2⁸-2 = 254 computers (x.x.x.0 -> network address and x.x.x.255 -> broadcast address are not permitted)

Fig. 04: Class C network

Class D subnetwork
The class D subnetwork consists of special addresses that are used for multicast addressing.

Summary
The splitting up of IP addresses in network share and node share leads to the following conclusions:

• A Class A network is larger than a Class C network, because there is a greater address area available for addressing the computers.

• There are much less Class A networks than Class C networks because the address area of the subnets is smaller.

Reserved addresses

• The Class A network address 127.x.x.x is reserved for the Loopback function of all computers, which means that
  all IP addresses that have the value 127 in the first byte may only be used for internal tests of computers.

• The value 255 in the last byte (Byte 4) is reserved asBroadcast Address. Thus, for example, the address 140.80.255.255 is a broadcast address to all nodes in the Class B network 140.80.0.0.

• The following ranges are reserved for private networks. All IP addresses from these ranges are not routed in the Internet.
  10.0.0.0 - 10.255.255.255
  172.16.0.0 - 172.31.255.255
  192.168.0.0 - 192.168.255.255

Until now, the connection between the class of the IP address and subnet mask has been explained. Furthermore, it is possible to extend the subnet mask with the so-called "subnetting" procedure.

Subnetting
Subnetting can be implemented in a Class A network, for example. It is possible to divide the computers of this Class A network into further logical units (subnets). We will observe the Class A network 86.x.x.x as an example. The subnet mask of this Class A network is 255.0.0.0 (1111 1111 0000 0000 0000 0000 0000 0000). The address area can be divided further into logical subnets by extending the subnet mask by 1 bit. The subnet mask is then 255.128.0.0 (1111 1111 1000 0000 0000 0000 0000 0000).

This means the following for addressing:

• Only the addresses 86.0.0.1 to 86.127.255.254 can communicate directly with each other, that is without router, because these computers have the same value (in this case "0") in the first bit after the subnet mask.

• Only the addresses 86.128.0.1 to 86.255.255.254 can communicate directly with each other, that is without router, because these computers have the same value (in this case "1") in the first bit after the subnet mask.

• The address area of the computers in this Class A network has been divided into two subnets.

Conclusion
By extending the subnet mask you can divide the address area of the computers into more logical units (subnets). The address area has been divided into two subnets in the example. By adding more bits you can quickly multiply the number of subnets.

Supernetting
Supernetting is the grouping together of multiple networks with partially the same network share in one subnet. The underlying technology is the opposite to subnetting and in principle means a procedure for addressing a large number of nodes within one subnet. With supernetting the node share of a network class is increased. Thus the network share of this network class is decreased.
We will observe the Class C network 192.168.178.0 as an example. The subnet mask of this Class C network is 255.255.255.0 (1111 1111 1111 1111 1111 1111 0000 0000). Now 2 bits are added to the node share. The subnet mask is then 255.255.252.0 (1111 1111 1111 1111 1111 1100 0000 0000).

• The lowest IP address of the network to be assigned is
  192.168.176.1 (1111 1111.1111 1111. 1011 0000. 0000 0001)

• The highest IP address of the network to be assigned is
  192.168.179.254 (1111 1111.1111 1111. 1011 0011. 1111 1110)

• The addresses 192.168.176.1 to 192.168.179.254 can communicate directly with each other, this means without router.

Requirement
The use of "Supernetting" requires that the modules in the network support the "Classless Inter Domain Routing" (CIDR) function.

Note
If the module configured in STEP 7 does not support the subnetting function or the supernetting function, then use of these functions is prevented by the following error message in STEP 7

Fig. 05: STEP 7 error message

The STEP 7 Online Help indicates that the subnet mask in the incorrect format as follows.

Fig. 06: STEP 7 Online Help

Description
The CP1628 enables safe connection to the Industrial Ethernet for SIMATIC PG/PC and PCs with PCI Express slot.

The security functions of the CP1628 are configured in the Security Configuration Tool (SCT).

Local and remote diagnostics of a CP1628
The SCT enables you to diagnose a CP1628 locally or remotely. You can have the security status of the CP1628 displayed in the Online View of the SCT.
The document below describes 3 scenarios of the local and remote diagnostics of one or more CP1628s:

• Local and remote diagnostics of a CP1628 when the NDIS IP address and the Industrial Ethernet IP address of the module are in the same subnet.
• Local and remote diagnostics of a CP1628 when the NDIS IP address and the Industrial Ethernet IP address of the module are in the same subnet.
• Local and remote diagnostics of several CP1628 when the NDIS IP address and the Industrial Ethernet IP address of the module are not in the same subnet.

NET_OnlineDiagnostic_CP1628_with_SCT_en.pdf ( 1116 KB )

Note on security
Caution
The functions and solutions described in this article confine themselves predominantly to the realization of the automation task. Furthermore, please take into account that corresponding protective measures have to be taken in the context of Industrial Security when connecting your equipment to other parts of the plant, the enterprise network or the internet. More information is available in Entry ID: 50203404.

Description
When changing from CP1613 A2 to CP1623 you must ensure that the hardware and software requirements below are met.

Hardware requirements
The CP1623 supports a more recent PC slot technology; this means that the CP1623 requires a PCI Express slot on the PC instead of a PCI or PCI-X slot as required by the CP1613 A2.
Information about the PCI slots in which the various Industrial Ethernet and PROFIBUS PC CPs can be operated is available in Entry ID: 15350579.

Software requirements
The CP1613A2 can be operated with all the current versions of the SIMATIC NET PC software as from V6.2 SP1.
The CP1623 is supported as from SIMATIC NET PC software V7.0 + Hotfix 1 (SIMATIC NET CD Edition 2007 + HF1).

The delivery release of the CP1623 is available in Entry ID 28402000.

Notes

• If necessary, refer to further release guidelines for Siemens products like WinCC, PCS 7 etc.
• The CP1623 does not have a 15-pin ITP interface like the CP1613 A2. The SCALANCE X101-1 AUI media converter is available for connecting an AUI segment to the CP1623. The delivery release of the SCALANCE X101-1 AUI is available in Entry ID 23588554.

Additional information

• Information about with which Microsoft Windows operating systems the CP1623 and the CP1613 A2 are released is available in Entry ID: 23785421.
• Information about which SIMATIC NET CD is released with which Microsoft Windows operating system is available in Entry ID: 9859007.

Description
This entry gives you an overview of the PROFINET IO controllers and IO devices that support the PROFINET functions below:

• Isochronous real-time communication (IRT)
• Prioritized startup
• Medium redundancy protocol (MRP)
• PROFIenergy
• Shared device
• I device
• Clock-synchronized mode for process data

The PROFINET IO controllers below support the above-mentioned PROFINET functions.

IO-Controller_PROFINET_functions_en.pdf ( 47 KB )

The PROFINET IO devices below support the above-mentioned PROFINET functions.

IO-Device_PROFINET_functions_en.pdf ( 47 KB )

Description
The Entry ID 49311792 gives you an overview of the PROFINET IO controllers and IO devices of SIMOTION and SINAMICS that support the PROFINET functions above.

Isochronous real-time communication (IRT)
Synchronized transmission procedure for cyclic exchange of IRT data between PROFINET devices. There is a bandwidth reserved for the IRT data in the transmitter clock. The reserved bandwidth guarantees that the IRT data can be transmitted at reserved, clock-synchronized intervals even when the network is otherwise heavily loaded (with TCP/IP communication or additional real-time communication, for example).

Prioritized startup
Prioritized startup is the PROFINET functionality for accelerating the startup of an IO device in a PROFINET IO system with RT and IRT communication.

The function cuts the time needed by the appropriately configured IO devices to get back into the cyclic user data communication in the cases below:

• After return of power supply
• After station return
• After IO device enabling

Medium redundancy protocol (MRP)
Medium redundancy is a function for ensuring that availability of networks and plants. Redundant transmission paths (ring topology) ensure that when one transmission path fails an alternative path is made available.

PROFIenergy
Function for saving power in the process, during idle times, for example, through temporary switch-off of the encoder and load supply in the potential group via standard PROFIenergy commands.

More information about PROFIenergy is available in the manuals ready for downloading in the Entry IDs below.
 

Manual	Description	Entry ID
SIMATIC PROFINET System description	General information about PROFIenergy	19292127
SIMATIC S7-300 with PROFINET interface	PROFINET IO Controller or IO Device with PROFIenergy	12996906
System and Standard Functions for S7-300/400 Volume 1 and Volume 2	Send and receive (PROFIenergy) data records With SFB73 "RCVREC" you receive the (PROFIenergy) data records in the I device of the higher-level IO controller. With SFB74 "PRVREC" you make the (PROFIenergy) data records in the I device available to the higher-level IO controller.	44240604
SIMATIC HMI Comfort Panels	Control of the backlight of the operator panel with PROFIenergy	49313233
SIMATIC ET 200S: Power module PM-E	Switch-off of the potential group by means of PROFIenergy	43582121
SIMATIC ET 200S: Motor starter ET 200S HF	Switch-off of the motor and measurement of the current motor current with PROFIenergy	6008567
SENTRON PAC3200 / PAC4200	Incorporation of the SENTRON PAC multifunctional measuring device in PROFINET and PROFIenergy with the SENTRON SWITCHED ETHERNET PROFINET module	26504372
SIRIUS motor starter M200D for PROFIBUS / PROFINET	PROFIenergy with motor starter M200D	38823402
ET 200S motor starter, fail-safe motor starter, safety engineering	PROFIenergy with DPV1 starter	6008567
ET 200pro motor starter	PROFIenergy with motor starter ET 200pro	22332388

Shared device
IO device that makes its data available to multiple IO controllers.

I device
Using the I device function you can use an IO controller also as IO device and thus establish a separate lower-level PROFINET IO subnetwork.
An I device can also be used as a shared device.

Clock-synchronized mode for process data
Process data, transmission cycle via PROFINET IO and user program are synchronized with each other to achieve the highest deterministics. The input and output data of distributed IOs in the plant is captured and output simultaneously. The equidistant PROFINET IO cycle is the clock for this.

Instructions
The Development Kit DK-16xx PN IO provides a simple way of integrating the PROFINET modules CP1616 and CP1604 in any operating system environment with standard PCI slot or PCI/104 interface.

As from V2.4 of the Development Kit DK-16xx PN IO it is possible to load a configuration or a firmware via NCM PC on to a CP1616 without having to install SOFTNET IE, the SIMATIC NET PC software.

Install the software of the Development Kit DK-166xx PN IO in the order given below.
 

No.	Procedure
1	Install NCM PC in the "ncm_pc" directory via Setup.
2	Install DK 16xx from the directory ...\V2.4.2\Win\disk1

Description
From STEP 7 V5.0 SP3 HF3 onwards you can reach ST stations online over and beyond subnet limits with the PG/PC, in order, for example, to load user programs or a hardware configuration or in order to execute test and diagnostic functions. You can connect a PG/PC at any place within the network and connect online to any stations which are reached through gateways.

Gateway
The gateway from a subnet to one or more other subnets is in a SIMATIC station that has interfaces to the subnets concerned.

Requirements

• At least STEP 7 V5.0 SP3 HF3 is installed on the PG/PC for configuration and use of the S7 routing function.
• An interface (Industrial Ethernet or PROFIBUS PC CP) is installed in the PG/PC to establish a connection to the gateway. You can use PROFIBUS PC CPs 55xx and 56xx. You can use any NDIS-compatible Ethernet network card (3COM, CP1613, for example) as Industrial Ethernet interface in the PG/PC.
• The associated communications modules of the station support the S7 routing function.
• The network configuration does not go across project boundaries.
• Both the modules and the PG or PC are loaded with the configuration information that contains the latest "knowledge" about the complete network configuration of the project.
  Technical background
  All the modules associated with the gateway must receive information about which subnets can be reached over which routes (= routing information).

Note
The lists below have been updated with the modules of the hardware catalog of STEP 7 V5.4 SP2. This means that older modules which support the S7 routing function are listed in the tables, but are not necessarily included in the hardware catalog of the latest versions of STEP 7.

SIMATIC S7-CPUs
The list below gives an overview of the SIMATIC S7 CPUs that support the S7 Routing function.

584459_Overview_CPUs_en.pdf ( 43 KB )

Communications processors (CPs)
The list below gives an overview of the PROFIBUS and Industrial Ethernet CPs that support the S7 Routing function.

584459_Overview_CPs_en.pdf ( 41 KB )

SIMATIC S7 FM modules
The list below gives an overview of the SIMATIC S7 FM modules that support the S7 Routing function.
 

FM	Version	Order number
FM 356-4 V5.0	V5.0	6ES7356-4BM00-0AE0
FM 356-4 V5.0	V5.0	6ES7356-4BN00-0AE0
FM 456-2	V5.0	6ES7456-2AA00-0AB0

Table 01

Gateways
The list below gives an overview of the gateways that support the S7 Routing function.
 

Link	Version	Order number
IE/PB Link	as from V1.0	6GK1411-5AA00
IE/PB Link PNIO	as from V1.0	6GK1411-5AB00
IWLAN/PB Link PNIO	as from V1.1	6GK1417-5AB00
IWLAN/PB Link PNIO	as from V1.1	6GK1417-5AB01

Table 02

SIMATIC S7 IM modules
The list below gives an overview of the SIMATIC S7 IM modules that support the S7 Routing function.
 

IM	Version	Order number
IM 467	as of V2.0	6ES7467-5GJ02-0AB0
IM 467 FO	as of V2.0	6ES7467-5FJ00-0AB0

Table 03

SIMATIC WinAC RTX, WinAC Slot and WinAC MP
The list below gives an overview of SIMATIC WinAC RTX, WinAC Slot and WinAC MP that support the S7 Routing function.
 

WinAC	Version	Order number
WinAC RTX	as from V4.0	6ES7671-0R...
WinAC Slot 412	as from V3.2	6ES7673-2C...
WinAC Slot 416	as from V3.2	6ES7673-6C...
WinAC MP	as from V4.1	6ES7671-4EE00-0YA0 6ES7671-5EF01-0YA0 6ES7671-7EG01-0YA0

Table 04

SINAUT communications modules
The list below gives an overview of SIMATIC WinAC RTX, WinAC Slot and WinAC MP that support the S7 Routing function.
 

TIM	Version	Order number
TIM 3V-IE	as from V1.0	6NH7800-3BA00
TIM 3V-IE Advanced	as from V1.1	6NH7800-3CA00
TIM 4R-IE	as from V1.0	6NH7800-4BA00
TIM 4RD	as from V3.x	6NH7 800-4AD90

Table 05

Note
The target station does not have to support the S7 Routing function.

Additional Keywords
Module function

Configuration Notes:
The SIMATIC NET OPC server is included in the SIMATIC NET PC software. With the SIMATIC NET OPC server, you can connect a PC station to S7 stations, S5 stations or third-party devices for data exchange via PROFIBUS or Industrial Ethernet.

The following communication services are available for communication via Industrial Ethernet:

• S5-compatible communication and S7 communication
  S5-compatible communication be used for data exchange with S7 stations, S5 stations and third-party devices. S7 communication can only be used for data exchange with S7 stations.
  You need one of the following SIMATIC NET PC software packages to be able to use these communication services including SIMATIC NET OPC server:
  • SOFTNET S7 Lean - for up to 8 connections via normal Ethernet network cards, CP1612 or CP1512.
  • SOFTNET S7 IE - for up to 64 connections via normal Ethernet network cards, CP1612 or CP1512.
  • S7-1613 - for up to 120 connections via CP1613 (A2) or CP1623.
     
• PROFINET IO controller
  You need the following SIMATIC NET PC software to operate a PC station as PROFINET IO controller:
  • SOFTNET PN IO - for up to communication via normal Ethernet network cards, CP1612 or CP1512.
    
• Fault-tolerant S7 communication
  You need the following SIMATIC NET PC software if you wish to configure fault-tolerant S7 connections for communication between S7-400H system and PC station:
  • S7-REDCONNECT - for communication via CP1613 (A2) or CP1623.  

The following communication services are available for communication via PROFIBUS:

• S7 communication
  S7 communication can only be used for data exchange with S7 stations. You need one of the following SIMATIC NET PC software packages if you want to use S7 communication including SIMATIC NET OPC server for data exchange:
  • SOFTNET S7 PB - for communication via CP5611 (A2), CP5621 or CP551x.  
  • S7-5613 - for communication via CP5613/14 (A2).
     
• FDL protocol
  The FDL protocol can be used for data exchange with S7 stations and S5 stations. You need one of the following SIMATIC NET PC software packages if you want to use the FDL protocol including SIMATIC NET OPC server for data exchange:
  • SOFTNET DP - for communication via CP5611 (A2), CP5621 or CP551x.  
  • CP5613/5614 (A2) - here you do not need any other software, because the protocol driver is supplied with the hardware.
     
• FMS protocol
  The FMS protocol can be used for data exchange with S7 stations and S5 stations. You need the following SIMATIC NET PC software package if you want to use the FMS protocol including SIMATIC NET OPC server for data exchange:
  • FMS-5613 - for communication via CP5613/14 (A2).
     
• PROFIBUS DP slave
  You need the one of the following SIMATIC NET PC software packages to operate a PC station as PROFIBUS DP slave:
  • SOFTNET DP slave - for communication via CP5611 (A2), CP5621 or CP551x.  
  • CP5614 (A2) - here you do not need any other software, because the protocol driver is supplied with the hardware.
    More information is available in the manual of the DP Base programming interface in Entry ID 1653531.
    Note:
    On the S5 side, an IM308C or a CP5431 is used as DP master.
• PROFIBUS DP master
  You need the one of the following SIMATIC NET PC software packages to operate a PC station as PROFIBUS DP master:
  • SOFTNET DP - for communication via CP5611 (A2), CP5621 or CP551x.  
  • CP5613/14 (A2) - here you do not need any other software, because the protocol driver is supplied with the hardware.
    More information is available in the manual of the DP Base programming interface in Entry IDs 1653531 and 25011749.
    Note:
    On the S5 side, an IM308C is used as DP slave.

Keywords:
OPC server, S5 link, S5 connection, S7 connection, Send, Receive, DP Base, SOFTNET

Configuration Notes:
Every communication uses different protocol layers of the ISO-OSI 7-layer model (e.g. transport layer). The protocol layers can be realized both through software on the communication processor and through software on the computer. If the computer is to do this task, then you have SoftNet card. If the work is done by the communication processor itself, then you speak of a HardNet card.
For the definition of whether you have a HardNet or SoftNet, therefore, it is important to know where the data exchange between the layers takes place. SoftNet communication processors simulate the required protocol via the computer and use the card only for the physical adapting of the signals to the bus system.

A HardNet card on the other hand has its own processor that handle the protocol processing independently. The driver software in the operating system (e.g. Windows NT) for this communications processor simply adds layers 6 and 7 to the protocol.

If you have to make a decision about which communications processor you want to use, then you must take the loading of the computer into account. If your computer is already heavily loaded by an application (e.g. WinCC), then it is always recommended to use a HardNet card.

Keywords:
System requirements, Minimum requirements, Performance