Siemens SIMATIC NET Dokumentacja Pobierz pdf (Strona 245)

Chapter 14. Troubleshooting 235

With this data type, valid addresses occur on four-byte boundaries because REALs

require four bytes for each value.

NOTE: If you change the data type to BYTE, then you can access each byte in the

datablock.

See Also

Understanding Data Types

Why do I receive the message Ran Out of Memory when I try to

select a new virtual field device?

Make sure the virtual field device you are selecting from the Power Tool exists in the

SIMATIC NET configuration you are using. If it is missing, add it to the database of

connections with the COML S7 program and assign a communication processor to it

with the PC/PC Interface program.

Using the Datascope

The datascope lets you see the contents of the data being transmitted to SIMATIC

NET and the full text of each message received. Error messages are not shown in the

datascope, however. The driver intercepts each messages for display in the datablock

statistics.

Any datablock that has the datascope enabled sends messages to the Datascope

window. You can only access the Datascope window from the local server.

Accessing the Datascope window from a remote node is not supported.

To interpret the data displayed, refer to your Siemens protocol documentation.

The datascope is a troubleshooting utility. Do not leave it running during production.

To enable the datascope for an object

[1] Right-click an object in the Tree Browser.

[2] Select Datascope On from the pop-up menu that appears.

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Siemens SIMATIC NET Dokumentacja Strona 245