Siemens SIMATIC RF170C Operating Instructions Manual page 34

Parameter settings
5.2 Configuration via STEP 7 (Basic/Professional)
Parameter
Specifying end
detection
No. of end delimiters
1st end delimiter
2nd end delimiter
Frame length
Character delay time
34
Parameter value
After character delay
time elapses
On receipt of fixed
number of characters
On receipt of the end
delimiter(s):
1
2
0...7F / 0...FF
0...7F / 0...FF
1...233 / 1...229
0...65535
Default value Description
After character delay Specifies the end detection of a received frame.
time elapses
•
•
•
1 Selection of the number of end delimiters.
A maximum of 2 end delimiters can be
configured. When data is received, the end of
the frame is recognized when the selected end
delimiter combination is received.
3 Entry of the first end delimiter of a maximum of
two end delimiters for the end criteria "On
receipt of the end delimiter(s)". The selected
end delimiter or the selected end delimiter
combination limits the length of the frame.
Parameter value depending on the "Data bits"
parameter.
0 Entry of the second end delimiter of a maximum
of two end delimiters for the end criteria "On
receipt of the end delimiter(s)". The selected
end delimiter or the selected end delimiter
combination limits the length of the frame.
Parameter value depending on the "Data bits"
parameter.
233 Entry of the frame length in bytes for the end
criterion "On receipt of fixed number of
characters".
The maximum value that can be set depends on
the selected "User mode".
15 Entry of the time that may elapse until a frame
end is recognized. Select the character delay
time dependent on the send behavior of your
communications partner. Depending on the
data transmission speed the character delay
time is limited to a minimum value.
Note that applications also pause between two
frames during transmission.
Operating Instructions, 02/2022, J31069-D0176-U001-A6-7618
After character delay time elapses:
The frame has neither a fixed length nor
defined end delimiters. The end of a frame is
indicated by a gap in the character
sequence. The size of this gap is specified by
the character delay time.
On receipt of fixed number of characters:
The length of the received frame is always
the same. When data is received, the end of
the frame is recognized when the set
number of characters has been received.
On receipt of the end delimiter(s):
At the end of the frame there are one or two
defined end delimiters. When data is
received, the end of the frame is recognized
when the set end delimiter is received.
SIMATIC RF170C