The IEC 60870-5-103 standard requires that an IED is identified as a certain Device type. The standard has only the following single functional device types:
- 128 distance protection
- 160 overcurrent protection device
- 176 transformer differential protection
- 192 line differential protection
The value in DevFunType n is automatically assigned to all IEC 60870-5-103 data points that have their function type defined as 0. The user has to assure that no similar IEC 60870-5-103 point definitions already exist with the same function type and information number.