Siemens SIPROTEC Diffetional Relay 132 KV Serial Communication with 800xA
Any body tried communication with siemens differential and ditance relay on serial RS 232 or RS 485
Please share your experience
I have used Profibus DP connection for these protections (Siprotec 4) and it works fine. 7UM62, 7SJ61, 7SA61 are tested from me.
It is important to use the correct Mapping (map of protection) and configure read/write from AC800 for complete number of words, defined in the mapping of protection, e.g. 96 bytes read, 8 bytes write. Otherwise the communication is not working.
Most probably the same is valid for serial communication (Modbus RTU is possible).
The used mapping you can check by means of Digsi software for protections and also on the display of relay protection