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14 User’s / Programming Guide
Data Transmission
Serial transmission data is composed of three of four different ele-
ments, depending upon host system requirements. These elements
are the START bit, DATA bits (7 or 8 bits), OPTIONAL PARITY bits,
and STOP bit (s) (1 or 2 bits).
The PARITY bit is used for error detection (e.g., data altered in trans-
mission), but is not required by all systems. A parity bit, if required,
will be in one of the following four formats:
If your system requires a WORD length of 7 bits, one or two STOP
bits, and a PARITY check, select the appropriate option from Table 1.
Table 1. 7 Bit Options
Data
Stop
Bits
Parity Option
7 1 Odd
ED
7 1 Even
EC
7 1 Mark
EB
7 1 Space
EA*
7 2 Odd
EH
7 2 Even
EG