Siemens SIMATIC ET 200AL System Manual page 309

Requirements
The following table shows the software requirements for the use of PROFINET IO functions
with the IM 157-1 PN interface module.
Table 2- 1
Real-time communication
Isochronous real-time communi-
cation
Device replacement without
programming device
Media redundancy
Shared device
Use a S7-1500 CPU as a controller to use a shared device with STEP 7 (TIA Portal).
1
Systems of third-party manufacturers: Depending on the range of functions of the third-party
2
system
Real-time communication
A transmission method for PROFINET IO based on a cyclic data exchange with a provider-
consumer model.
Isochronous real-time communication
Synchronized transmission method for cyclic exchange of IRT data between PROFINET
devices. A reserved bandwidth within the send clock is available for IRT data. The reserved
bandwidth ensures that IRT data can be transferred at reserved synchronized intervals,
without being influenced by other higher network loads (e.g., TCP/IP communication, or
additional real-time communication).
A topological configuration is required for IRT.
Note
IO controller as sync master with IRT communication
We recommend that you also operate the IO controller as a sync master when configuring IRT
communication.
Otherwise IRT and RT configured IO devices may fail if the sync master fails.
IM 157-1 PN (6ES7157-1AB00-0AB0)
Equipment Manual, 05/2021, A5E32347036-AE
Software requirements for PROFINET IO functions
PROFINET IO function Configuration software
STEP 7 (TIA Portal) V13 or
higher
(with GSD file)
X
X
X
X
X
1
Product overview
2.3 Functions
STEP 7 V5.5 SP4 or higher
(with GSD file)/Software from
third-party manufacturer
X
X
X
X
X
2
13