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Siemens Industry Online Support
Siemens AG
Entry type: FAQ Entry ID: 109738133, Entry date: 05/18/2017
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In STEP 7 (TIA Portal), how do you transfer the values between the "Monitor value" and "Start value" columns with the Global DBs?

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Contrary to STEP 7 V5.x, in STEP 7 (TIA Portal) you can save the monitor values and transfer them to the "Start value" column.

Description
In STEP 7 (TIA Portal) V14 and higher the toolbar in the global data blocks has been improved making it easier to use. You can now transfer the start values directly to the "Monitor value" column. If you want to copy the monitor values to the "Start value" column, you must first save the values in the main memory for the data block. A time stamp (date) for this snapshot is displayed under the toolbar. You can then save the values from the snapshot as start values.

Using the "Copy snapshots to start values" and "Load start values as actual values" functions you can copy either all the values or selected values.
 


Fig. 1

Note
Changing the tag values while the plant is running can lead to serious damage to property or persons if errors occur in the function or in the program. Refer here to the information in the STEP 7 (TIA Portal) manual under Danger when changing tag values.

Further Information
More information is available in the STEP 7 (TIA Portal) manual under "Overview of the online and diagnostic functions in data blocks".

Applying values from the online program as start values
Open the configuration for the technology object ("PID_Compact" or "PID_3Step") and select the "Function View" tab. Then switch to the Online view and click the icon as in Fig. 2:

  • "Generate snapshots of the monitor values and apply the setpoint values of these snapshots as start values"
     

Fig. 2

Note
If you want to transfer the values of individual parameters that are not marked as setpoint values from the "Snapshot" column to the "Start value in the project" column, you copy the values from the pop-up menu using the "Copy" command and use the "Paste" command to paste them into the "Start value in the project" column.

Creation Environment
The screens in this FAQ response were created with STEP 7 (TIA Portal) V14.

Security information
In order to protect technical infrastructures, systems, machines and networks against cyber threats, it is necessary to implement – and continuously maintain – a holistic, state-of-the-art IT security concept. Siemens’ products and solutions constitute one element of such a concept. For more information about cyber security, please visit
https://www.siemens.com/cybersecurity#Ouraspiration.