4.2.31 RS232 BD - RS-232 BAUD RATE
Parameter #51 (RS232 BD) allows the operator to select one of three baud rates for the RFL
9300's RS-232 port: 1200, 2400, or 9600 baud. It should be set to match the baud rate of the
equipment that will be connected to the RFL 9300 through the front panel or rear panel RS-232
connectors. If you're not sure, set Parameter #52 to "9600;" this will work in most cases.
NOTE
Parameter #51, Baud Rate, is not displayed in the APRIL menus shown in Figures
6-10 and 6-11. This means that Baud Rate can only be programmed via the RFL
9300 display panel.
RFL 9300 RFL Electronics Inc.
August 9, 2001 4 - 13 (973) 334-3100
4.2.32 RS232 PR - RS-232 PROTOCOL
Parameter #52 (RS232 PR) allows the operator to select the handshaking protocol for the RFL
9300's RS-232 port. Two protocols are available: XON/XOFF and RTS/CTS.
XON/XOFF handshaking is also called "software handshaking." It uses commands sent through
the port to control data flow, and requires no additional cable connections. RTS/CTS handshak-
ing is also called "hardware handshaking," and requires two additional cable connections. When
RTS/CTS handshaking is used and the RFL 9300 is ready to receive characters, it raises the
RTS line. The RFL 9300 will not transmit its characters until it sees the CTS line go high.
Parameter #52 should be set to match the protocol of the equipment that will be connected to the
RFL 9300 through the front panel or rear panel RS-232 connectors. If you're not sure, set Pa-
rameter #52 to "XON/XOFF"; this will work in most cases.
NOTE
Parameter #52, RS-232 Protocol is not displayed in the APRIL menus shown in Fig-
ures 6-10 and 6-11. This means that RS-232 Protocol can only be programmed via
the RFL 9300 display panel.
4.2.33 SEL POLE – SELECTIVE POLE RELAYING
Parameter #141 (SEL POLE) is used in single-pole applications. The standard single-pole algo-
rithm trips only the faulted phase for single-line-to-ground faults, and trips all three phases for
multiphase faults which occur within a 3 second interval. If Selective Pole Relaying is enabled
only the faulted phases are tripped. This means that a fault could result in one, two or three
phases being tripped. SEL POLE is not displayed unless the relay is configured for single-pole
operation.
To Next Page
Loading...