'Safety Information' Editor (Project)
The following information refers to a specific, typical device type. Your screen may differ.
This help topic describes the 'Safety Information' editor of the 'Project' PLANT node. This editor is only available if your project includes a Safety PLC. The editor displays checksums which were calculated over safety-related data on project level. The information is read-only.
This topic contains the following sections:
Toolbar of the 'Safety Information' editor
| Icon | Meaning |
|---|---|
 | Exports the checksums from the 'Safety Information' editor to an Excel file. |
Checksums listed in different editor categories
On the left side on the 'Safety Information' page, several checksum categories can be selected. The following table lists the checksums shown in these categories:
| Editor category | CRC | Description | |
|---|---|---|---|
| Project | Project | Overall checksum on safety-related project parts.
|
|
| Project | Complete Logic | CRC over the complete logic, i.e., data of all instantiated programs and function blocks. | |
| Project | Global Variables | CRC over all global variables of the Safety PLC. | |
| Project | Safety variable / Process data interconnection | CRC over all mapped process data items. Only available if at least one safety-related assignment exists in the Data List of the Safety PLC. | |
| Project | Devices / Modules | CRC over the parameterization data of all safety-related devices contained in the project. | |
| Libraries | Library name | CRC over the data of each POU contained in an included library. Example: After including the PLCopen_SF library, the CRC for each contained safety-related PLCopen function block is listed under the heading 'PLCopen_SF'. |
|
| POUs | POU name | CRC over the data of each individual safety-related POU. These CRCs also shown in the 'Safety Information' editor of the respective POU. |
|
| Devices / Modules | Device name | CRC over parameterization data of safety-related devices in the PLANT. The checksum also includes the F-Parameters and the CRC of the device description file.
|
You can use these checksums to find out whether the project has been modified compared to older project versions. For that purpose, you have to manually compare each checksum with the relating CRC in the printed project documentation of the older, archived project version.
The Global Variables checksum is of particular importance when replacing the Safety PLC.
Details on checksums can be found in the topic "Verification Mark for SNOLD Networks" and the section "Checksum display in the 'Safety Information' editor".