ABB REL 356

ABB REL 356 Current Differential Protection
2-14
Installation, Operation and Maintenance
The RS232 PONI allows communication speed from 300 baud to 19200 baud. The baud rate is selected by dip-switches
on the PONI:
Baud switch 1 switch 2 switch 3
300 0 0 0
1200 0 0 1
2400 0 1 0
4800 0 1 1
9600 1 0 0
19200 1 0 1
Figure 2-2. RS232/PONI Communication Interface Device
When in the remote mode, the computer can disable the local setting by showing SET = REM (in the Metering mode).
Then, the setting cannot be changed locally. In this situation, the only way to change a setting locally would be to turn
the dc power “OFF” and then “ON”. The computer will allow for a local setting change within 15 minutes. Refer to the IL
40-603 (Remote Communication Program) for detailed information.
For REL 356 Modbus Communicaton, see IL 40-616, Poni-M RS485 Product Operated Network Interface User’s Guide.
Digital Fault Recording
Refer to ABB Publications:
• IL 40-603 Remote Communication Program
• IL 40-606 Oscillographic and Recording Program
REL 356 Settings
The REL 356 setting mnemonics and the appropriate setting information is in Table 3-1, i.e., setting name, format,
setting range (min, max, step), units and related notes.
Monitoring Functions
The REL 356 monitoring functions display on-line system information (see Table 2-3; monitoring values and conditions
are listed in Table 2-4). All angles are computed using VAG as the reference angle.