ABB Relion 670 series, Technical Reference Manual, Page: 1051 / 1232

The only information that is easily available is test-mode status. The other information
is always set (hard coded) to:
TP Recorded fault with trip. [1]
TM Disturbance data waiting for transmission [0]
OTEV Disturbance data initiated by other events [1]
Another information element in ASDU23 is the FAN (fault number). According to the
standard this is a number that is incremented when a protection function takes action.
In 670 series FAN is equal to disturbance number, which is incremented for each
disturbance.
ASDU26
When a disturbance has been selected by the master; (by sending ASDU24), the
protection equipment answers by sending ASDU26, which contains an information
element named NOF (number of grid faults). This number must indicate fault number
in the power system,that is, a fault in the power system with several trip and auto-
reclosing has the same NOF (while the FAN must be incremented). NOF is in 670
series, just as FAN, equal to disturbance number.
To get INF and FUN for the recorded binary signals there are parameters on the
disturbance recorder for each input. The user must set these parameters to whatever he
connects to the corresponding input.
Interoperability, physical layer
Supported
Electrical Interface
EIA RS-485 No
number of loads No
Optical interface
glass fibre Yes
plastic fibre
Transmission speed
9600 bit/s Yes
19200 bit/s Yes
Link Layer
DFC-bit used Yes
Connectors
connector F-SMA No
connector BFOC/2.5 Yes
1MRK505222-UUS C
Section 17
Station communication
1045
Technical reference manual