Type ‘y’ for yes or ‘n’ for no and press Page 37
Page 37
RPC with or without Ethernet
36
Type the number to select the Stop Bits option and press
Parity
Parity is a simple form of error checking used in serial communication. For even and odd parity, the
serial port will set the parity bit (the last bit after the data bits) to a value to ensure that the transmission
has an even or odd number of logic high bits. For example, if the data was 011, then for even parity,
the parity bit would be 0 to keep the number of logic high bits even. If the parity was odd, then the
parity bit would be 1, resulting in 3 logic high bits. This allows the receiving device to know the state
of a bit so as to enable the device to determine if noise is corrupting the data or if the transmitting and
receiving devices' clocks are out of sync.
With no parity selected, it's assumed that there are other forms of checking that will detect any errors
in transmission. No parity also usually means that the parity bit can be used for data, speeding up
transmission. In modem-to-modem communication, the type of parity is coordinated by the sending
and receiving modems before the transmission takes place.
Select 5), to get the Parity, Default is None the RPC displays the following:
Type the number to select the Parity option and press
RTS/DTR Line Driver Inactivity State
RTS (Request to Send)/ DTR (Data Terminal Ready) is normally used in conjunction with an external
modem. With no modem the RTS and DTS default state is High.
Select 6), to get the RTS driver state, the RPC displays the following:
Select 7), to get the RTS driver state, the RPC displays the following:
Type ‘Y’ for YES or ‘N’ for NO and press
Serial Port Device Name
Select the port to be renamed, followed by a
Current device name: EIA-RS232
Enter device name for serial port ((1 - 16 char., CR to end) :
Select parity:
1 For None
2 For Even
3 For Odd
Enter Request :
RTS Line Driver Inactive State is: High
High ? (Y/N, CR for no change):
DTR Line Driver Inactive State is: High
High ? (Y/N, CR for no change):