Siemens SIMATIC RF185C Operating Instructions Manual page 76

Configuring with the WBM
7.3 The menu items of the WBM
Table 7- 7 Parameters in the "Reader parameters" parameter group II (Freeport)
Parameter
Interface
Parity
Data bits
Stop bits
76
Parameter value
RS422
RS232
None
Odd
Even
Fixed value 1
Fixed value 0
7
8
1
2
Default value Description
RS232 / RS422 Selection of the interface type that the connect-
ed hardware (reader / optical readers) uses.
The default value depends on the interface
used:
None Parity selection
A sequence of data bits can be expanded by a
parity bit. With its value "0" or "1", the parity bit
is added to the sum of all bits (data bits and
parity bits) to form a defined status. This in-
creases data reliability.
•
•
•
•
•
Note: The values "Fixed value 0" and "Fixed
value 1" are not supported by Linux systems. In
this case, the value "None" is used automatical-
ly.
8 Selection of the number of bits to which a char-
acter is mapped.
1 Selection of the number of stop bits that indi-
cate the end of a character.
The stop bits are appended to every transferred
character during transmission.
SIMATIC RF185C, RF186C, RF188C, RF186CI, RF188CI
Operating Instructions, 04/2020, C79000-G8976-C512-03
None:
Data is sent without a parity bit.
Odd:
The parity bit is set so that the sum of the
data bits (including the parity bit) is odd
when the signal state is "1".
Even:
The parity bit is set so that the sum of the
data bits (including the parity bit) is even
when the signal state is "1".
Fixed value 1:
The parity bit is set permanently to the value
"1".
Fixed value 0:
The parity bit is set permanently to the value
"0".