Overwriting Actual Values Of A Data Block With Snapshot Values - Siemens SIMATIC S7-1500 System Manual

6.1.4.6

Overwriting actual values of a data block with snapshot values

Overwrite actual values with a snapshot
With the option "Copy all values from the snapshot to the actual values of the CPU" you
overwrite the actual values of a data block with momentary values. The values from the
snapshot are then written to the CPU work memory. The CPU then uses these values as
actual values in the online program.
Changes to tag values
Changing the tag values while the plant is operating can cause serious damage to property
or injury to persons if there are functional disturbances or program errors!
• Make sure that the plant is in a safe state before you overwrite the actual values.
• Make sure that the program does not read or write the affected data during
• You may want to use the "Modify tags" function in the watch table or in the DB editor as
Requirement
The following requirements must be met before you can execute the option:
● The CPU is connected to the programming device/PC via the PROFINET interface.
PROFIBUS interfaces of the CPU and interfaces of CMs/CPs are also supported.
● The CPU is online.
● As least one data block has been loaded to the CPU.
Procedure
To overwrite the actual values of a block with a snapshot, follow these steps:
1. Open the data block.
2. Start the monitoring by clicking the "Monitor all" button.
The "Monitor value" column is shown in the table. This shows the actual data values.
3. On the toolbar, click "Snapshot of the monitor values".
The actual monitor values are applied in the "Snapshot" column. Note here that the
monitor values can originate from various program cycles.
4. To apply the values, click "Copy all values from the snapshot to the actual values of the
CPU" on the toolbar.
Automation system
System Manual, 12/2014, A5E03461182-AC
WARNING
transmission.
an alternative.
Configuring
6.1 Configuring the CPU
103