Table 24: COM1/2 serial communication settings
Parameter Values (Range) Unit Step Default Description
Fiber mode
0=No fiber
2=Fiber optic
0=No fiber Fiber mode
Serial mode
1=RS485 2Wire
2=RS485 4Wire
3=RS232 no hand-
shake
4=RS232 with hand-
shake
1=RS485 2Wire Serial mode
CTS delay 0...60000 ms 1 0 CTS delay
RTS delay 0...60000 ms 1 0 RTS delay
Baudrate
1=300
2=600
3=1200
4=2400
5=4800
6=9600
7=19200
8=38400
9=57600
10=115200
6=9600 Baudrate
3.2 Self-supervision
The protection relay's extensive self-supervision system continuously supervises the
software and the electronics. It handles run-time fault situation and informs the
user about a fault via the LHMI and through the communication channels.
There are two types of fault indications.
• Internal faults
• Warnings
3.2.1 Internal faults
When an internal relay fault is detected, relay protection operation is disabled,
the green Ready LED begins to flash and the self-supervision output contact is
activated.
Internal fault indications have the highest priority on the LHMI. None of
the other LHMI indications can override the internal fault indication.
An indication about the fault is shown as a message on the LHMI. The text
Internal Fault with an additional text message, a code, date and time, is shown
to indicate the fault type.
Different actions are taken depending on the severity of the fault. The protection
relay tries to eliminate the fault by restarting. After the fault is found to be
permanent, the protection relay stays in the internal fault mode. All other output
1MRS758755 C
Basic functions
REC615 & RER615
Technical Manual
57
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