Siemens SIMATIC RF170C Operating Instructions Manual page 33

Table 5- 2 Parameters in the "Frame" parameter group
Parameter
Data bits
Parity
Stop bits
SIMATIC RF170C
Operating Instructions, 02/2022, J31069-D0176-U001-A6-7618
Parameter value
7
8
None
Odd
Even
Fixed value 1
Fixed value 0
1
2
5.2 Configuration via STEP 7 (Basic/Professional)
Default value Description
8 Selection of the number of bits on which a
character is represented.
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
increases data reliability.
•
•
•
•
•
1 Selection of the number of stop bits that
indicate the end of a character.
The stop bits are appended to every transferred
character during transmission.
Parameter settings
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".
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