Configuration (Step 7 V5.5); Principle Of Io Device Coupling - Siemens S7-300 Configuration Manual

7.2

Configuration (STEP 7 V5.5)

Configuration with STEP 7 V5.5
The configuration of the CP as an I-device includes the two following procedures in STEP 7:
● Enabling the CPU as a PROFINET IO device in the S7 station
● Inserting the CP as a PROFINET IO device in the IO system
These activities can be performed in any order. On completion of the two activities, there is a
coupling between the configured IO device and the module configured in the S7 station.
7.2.1

Principle of IO device coupling

The coupling between the configured IO device and the module configured in the S7 station
is supported as an "explicit" link in STEP 7 as of version V5.4 SP4. With older STEP 7
versions, support of this link is simply implied by having identically configured device names
for the IO device and the module.
"Explicit" coupling of the PROFINET IO device in the PROFINET IO system and in the station
IO device coupling means the fixed assignment of an IO device configured with STEP 7 in a
PROFINET IO system to a module that is configured in an S7 station or in a PC station
(hardware-oriented assignment).
The consistency between the device names and IP addresses in the IO device and the
module in the station can be established by STEP 7 based on the "explicit" coupling and can
be checked during the consistency check.
Previously: "implicit" coupling
Modules configured as IO devices in a station with older STEP 7 versions (prior to V5.4 SP4)
use implicit coupling. These modules achieved a logical assignment to an IO device
configured in a PROFINET IO system by using identically configured device names and IP
addresses.
Disadvantage: Here, the consistency check in STEP 7 only detects that device names and
IP addresses have been assigned more than once and can output a warning. It is not
possible to recognize existing couplings based on these messages. Intended couplings that
are not established due to incorrectly entered device names cannot be detected for implicit
couplings during the consistency check.
Configuring and commissioning S7 CPs for Industrial Ethernet
Configuration Manual, 09/2013, C79000-G8976-C182-13
The CP is inserted in a SIMATIC S7-300 station and enabled for PROFINET IO device
mode in the properties dialog.
The CP is assigned as a PROFINET IO device to the IO system of a PROFINET IO
controller.
Intelligent PROFINET IO device with S7-300 CP
7.2 Configuration (STEP 7 V5.5)
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