Diagnostics and maintenance
4.1 Diagnostics mechanisms of PROFINET IO
PROFINET with STEP 7 V15
Function Manual, 12/2017, A5E03444486-AH
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Asset management data record for I-devices
With STEP 7 (TIA Portal) as of V15 and with S7-1500 CPUs as of Firmware V2.5, you have
the possibility to compile an asset management record via a user program. Configured as an
I-device, these CPUs then supply the data from centrally plugged modules to a requesting IO
controller as assets.
"S7-1500 CPUs" also refers to the CPU variants S7-1500F, S7-1500T, S7-1500C, S7-1500
SW Controller, S7-1500pro CPUs and ET 200SP CPUs.
Asset management records for I-devices
I-devices often represent machines. The PROFINET IO controller to which the I-device is
assigned only sees the PROFINET interface (also configured as an IO device) and the
transfer areas of the I-device configured by the machine manufacturer. The local modules of
the I-device are not visible or cannot be accessed.
The assigned IO controller can read the central modules as assets of the I-device by means
of an asset management record that the user program of the I-device compiles.
Figure 4-6 Assets of an I-device
● S7-1500-CPU as of firmware V2.5, configured as an I-device
● STEP 7 (TIA Portal) as of V15
● If an IO controller is to read the asset management record:
The PROFINET IO controller is programmed correspondingly to read an asset
management record.
For a SIMATIC IO controller, for example, you call a read instruction (RDREC) with
record index 0xF880. The instruction addresses any submodule of the I-device, for
example the first configured transfer area submodule.
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