3M Touch Systems Proprietary Information
36
3M Dynapro ET 3170 Terminal User’s Installation Guide
! Parity Sense
The terminal uses either odd (default) or even parity checking:
! Odd (Default): The parity bit and the data bits together contain an odd
number of binary 1s. For example, for the data bits 1010100, the parity bit
is 0, making the total number of 1s odd (in this example there are a total of
three 1s).
! Even: The parity bit and the data bits together contain an even number of
binary 1s. For example, for the data bits 1010100, the parity bit is 1,
making the total number of 1s even (in this example there are a total of four
1s).
Stop Bits sets the terminal to send and receive codes with either one or two stop
bits.
! 1 (Default): If the Stop Bits parameter is set to l, only one stop bit per code is
used for both transmitting and receiving over the communication link.
! 2: If the Stop Bits parameter is set to 2, two stop bits are used for both
transmitting and receiving.
Table H: Touch Control Screen Parity Settings
Parity
Enable
Setting
Parity
Sense
Setting
Effect
Off Even or odd
n Parity checking and generation are disabled.
n ET 3170 terminal does not transmit a parity bit and does
not expect parity bits in the data it receives.
n If the terminal receives data containing a parity bit, the
data is dispIayed as a framing error (FE).
On Even
n Parity checking and generation are enabled.
n The terminal transmits even-parity data by appending a
parity bit and expects received data to have even parity.
n If the ET 3170 terminal receives data containing odd
parity, the data is displayed as a parity error (PE).
On Odd
n Parity checking and generation are enabled.
n The terminal transmits odd-parity data by appending a
parity bit and expects received data to have odd parity.
n If the terminal receives data that has even parity, the data
is displayed as a parity error (PE).
Ignore Even
n Parity checking is disabled, but even parity generation is
enabled.
n The terminal transmits even-parity data by appending a
parity bit and expects received data to have a parity bit.
n However, the terminal does not check the parity of the
received data.
Ignore Odd
n Parity checking is disabled, but odd parity generation is
enabled.
n The terminal transmits odd-parity data by appending a
parity bit and expects received data to have a parity bit.
n However, the terminal does not check parity of the
received data
.
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