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Entry type: FAQ Entry ID: 109479905, Entry date: 06/16/2016
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What is the difference between the PROFIsafe address types 1 and 2 in relation to the uniqueness of the PROFIsafe address?

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The PROFIsafe address is for the unique addressing of the F IO and for protecting standard address mechanisms like IP addresses. Here, the uniqueness is defined differently with the F IO of the PROFIsafe address type 1 and with the F IO of the PROFIsafe address type 2. The differences are explained below.

Validity
This FAQ response is an addition to the manuals for Distributed Safety / F Systems (F Configuration Pack SP12 and higher), because the PROFIsafe address type 2 is not dealt with in the relevant manuals. The valid manual for STEP 7 Safety V13 and higher is "SIMATIC Safety - Configuring and Programming".

If you assign uniquely the F destination addresses of all F IOs in your plant network-wide and CPU-wide, then the information in the manual about Distributed Safety / F Systems is still valid. This FAQ response is relevant for you if you are using F IOs of the PROFIsafe address type 2 and for these you want to use the F source addresses for the uniqueness of the PROFIsafe addresses. Refer also to the product information 100648623.

Definition of PROFIsafe address
The PROFIsafe address (code name as per IEC 61784-3-3: 2010) is for the unique identification of source and destination. Therefore each F IO has two address parts:

  • F source address
  • F destination address

You can use one or both address parts for protection.

PROFIsafe address type 1
The uniqueness of the PROFIsafe address is only ensured by the F destination address. The F source address has no influence on the uniqueness of the PROFIsafe address. Therefore, the F destination address must be unique CPU-wide1) and network-wide2) and should then be checked in the Safety printout.

The PROFIsafe address type 1 is used by the following F modules:

  • ET 200M
  • ET 200S
  • ET 200pro
  • ET 200eco
  • ET 200iSP
  • KTP400F MOBILE

  • KTP700F MOBILE

  • KTP900F MOBILE

  • SINAMICS G120

  • SINAMICS S110
  • SINAMICS S120

IOs on which the F destination is set with DIP switches generally use address type 1.

Fail-safe DP standard slaves and fail-safe IO standard devices use address type 1 unless instructed otherwise in the relevant documentation.

PROFIsafe address type 2
The uniqueness of the PROFIsafe address is ensured by the combination of F source address and F destination address. The PROFIsafe address must be unique CPU-wide1) and network-wide2). You achieve this when both conditions are met:

  • The F source address (parameter "Basis for PROFIsafe addresses") of the F CPU is unique network-wide2).
  • The F destination address of the F module is unique CPU-wide1)

WARNING:
If you use the F source address to ensure the uniqueness of the PROFIsafe address for IOs of the PROFIsafe address type 2, you must use the Safety printout to check that each separate F IO is assigned to the correct F source address. This holds also for checking the F destination addresses for uniqueness.

Manufacturers of series production machines have the option of operating identical machines on the same PROFIBUS/PROFINET segment and only changing the F source address of the F CPU.

This might look like this:
Machine A: F-CPU S7-300 with the F source address 1000 and ET 200SP with the F destination addresses 1, 2, 3.
Machine B: F-CPU S7-300 with the F source address 2000 and ET 200SP with the F destination addresses 1, 2, 3.

The PROFIsafe address type 2 is used by the following F IOs:

  • ET 200SP
  • ET 200MP (only for TIA Portal)
  • S7-1200 F IO (only for TIA Portal)

Special feature of the ET 200SP in Distributed Safety / F Systems
Distributed Safety / F Systems handle the ET 200SP as an F IO of address type 1. Therefore, the Engineering System requires that the F destination address be assigned only once in a project. If, however, you are working in multiple projects, you can assign the same F destination address for the ET 200SP in each project as long as the conditions for the uniqueness of the PROFIsafe address of address type 2 as described above are met.

Use of PROFIsafe address types 1 and 2 in one network
If you use F IOs of address type 1 and address type 2 in one network, the F destination addresses of the F IOs of address type 1 must continue to be unique network-wide2) and F IOs of address type 2 must not include any F destination addresses that are assigned in that network to F IOs of address type 1.

Further Information

The manual "S7 Distributed Safety - Configuring and Programming" is available in Entry ID 22099875.
The manual "SIMATIC Safety - Configuring and Programming" is available in Entry ID 54110126.
Configuration examples are available in Entry ID 109740240 

1)"CPU-wide" includes all F IOs assigned to one F CPU: central F IOs of this F CPU and F IOs for which the F CPU is DP master/IO controller. F IOs that are addressed by I slave-slave communication are assigned to the F CPU of the I slave and not to the F CPU of the DP master/IO controller.

2)A network consists of one or multiple subnetworks. "Network-wide" means across subnetwork boundaries. With PROFIBUS a network comprises all the nodes that can be accessed via PROFIBUS DP. With PROFINET IO a network includes all the nodes that can be accessed via RT_Class_1/2/3 (Ethernet/WLAN/Bluetooth, Layer 2) and, where applicable, RT_Class_UDP (IP, Layer 3).

Last changes
Additional link to configuration examples

Security information
In order to protect technical infrastructures, systems, machines and networks against cyber threats, it is necessary to implement – and continuously maintain – a holistic, state-of-the-art IT security concept. Siemens’ products and solutions constitute one element of such a concept. For more information about cyber security, please visit
https://www.siemens.com/cybersecurity#Ouraspiration.
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