Saving SCALANCE Configuration Data in an S7-1500
To back up the configuration data or in case of device replacement, the user has the option to store the configuration on a storage medium (C-PLUG or configuration plug). The SCALANCE switches of the XB-200 series, the W761 access point and the W72x client modules do not feature a C-PLUG slot. A backup of the configuration data must be triggered manually and specifically using CLI or WBM. Automatic saving in the controller is an alternative to the C-PLUG.
The “SNMP” and “TFTP” function blocks were developed to implement the task – save the configuration data in the controller. They allow you to save and back up the configuration data (depending on the size) in one or more data blocks (DBs) (“upload”) and restore it due to maintenance or repair (“download”). The DBs are stored in the CPU’s load memory.
To do this, the application uses two protocols:
- SNMP (Simple Network Management Protocol)
- TFTP (Trivial File Transfer Protocol)
This application example provides two variants:
- “Automatic” variant:
Automatic “upload”/“download” of the configuration data of all network components supported and configured as a PROFINET IO device.
- “Manual” variant:
Manual, device-specific “upload”/“download” of the configuration data of one supported network component. An HMI can be used for operator control.
The solution presented here offers the following advantages:
- Central storage of the configuration data in the controller’s load memory.
- Configuration data can be easily loaded back to the device in case of replacement or when restoring the original configuration.
- Saves time and costs due to the use of existing mechanisms/protocols.
- No additional hardware tools or devices required.