Siemens Simatic S7-1500 Manuel - Page 19

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4 Configuration/Engineering

Data sizes and update times

In the [Params] section, several parameter sets are defined, which are used later in

the EDS file.

The relevant information for the configuration of the EnetIoSystem are here

•

Update interval

•

Size of Inputs and Outputs

Figure 4-6 [Params] section RPI and Output Data size

In the above shown figure the parameter, marked with 1 describes the RPI called

"Requested Packet Interval" or update rate in µs.

The update rates in the range between 2.000µs (2ms) and 20.000.000µs (20s) are

valid for this device. The default setting is 10.000µs (10ms).

The parameter marked with 2, describes the size of the Output data in Bytes. The

valid range is in between 0 Bytes and 496 Bytes, where the default is equal to the

maximum size.

NOTE

The maximum size of 496 Bytes is a limitation given by the ODVA® specification

for EtherNet/IP. It is introduced for compatibility reasons to ControlNet, which is

another network using the same communication mechanisms defined in CIP as

EtherNet/IP.

Further down in the [Params] section you will find the other relevant information for

the Input data size and the configuration data size. They are shown in the below

figure.

EtherNet/IP Scanner

Entry-ID: 109782314,

V1.1.0,

04/2021