Storage diagnostic data (optional)
In normal operation, storage errors are reported via the error handling of the software module. This error message contains only one type of error. If the energy storage unit consists of a storage system with individual diagnostic interfaces per energy storage unit, then the customer does not receive any information via this error message regarding the energy storage unit that triggered the error. To improve diagnostics and to localize errors, up to 24 storage diagnostic interfaces can be added as optional process data.
The 4 most important signals (overtemperature warning, overtemperature error, overvoltage and sensor break) are coded in bit-wise manner.
If more power is required, the number can be doubled by connecting another string in parallel. Up to 3 strings can be managed via the optional process data. This results in up to 6 additional process data words.
The individual bits appear in the same order in which the storage interface were declared to StorageMonitoring.
- The first word contains storage temperature warnings and errors:
- Bit 0-7 = Overtemperature warning of storage 0-7
- Bit 8-15 = Overtemperature fault of storage 0-7
- The second word contains overvoltage and sensor break:
- Bit 0-7 contains the overvoltage error bits
- Bit 8-15 represents the sensor break information
Word | Bit | Function | |
|---|---|---|---|
PI 9 | Storage diagnostics temperature | 0-7 | Each bit is an overtemperature warning of a storage interface |
8-15 | Each bit is an overtemperature fault of a storage interface | ||
PI 10 | Storage diagnostics overvoltage and sensor break | 0-7 | Each bit is an overvoltage of a storage interface |
8-15 | Each bit is a sensor break/sensor short circuit signal of a storage interface | ||
INFORMATION
If a temperature error is set, the temperature warning bit also remains set.
Example
Nine storage interfaces are registered. This means that 4 process data words are occupied. However, there is only one storage diagnostic bit in the 2nd and 4th while the 1st and 3rd are fully occupied.
|
If, for example, there was an overtemperature error in the 5th storage module, an overvoltage in the 6th and an overtemperature warning in the 9th, the process data interface would look as follows:
|
