Siemens SIMATIC CP 440 Manual page 71

Protocol Parameters
The table below describes the protocol parameters.
Table 5-5 Protocol Parameters (ASCII Driver)
Parameter
End ID of a Specifies the criterion that
Receive indicates the end of each message
Message Frame frame.
Character Delay The character delay time defines
Time the maximum permitted time
between 2 consecutively received
characters.
Monitoring Time The character delay time is used
for Missing as the monitoring time for a
End ID missing end code. This applies to
the following settings for the end
code
– On Receipt of Fixed
– On Receipt of End
1
1st End ID First end code.
1
2nd End ID Second end code, if specified.
You can parameterize the following
for the end code:
– 1st end ID AND
– 1st end ID OR 2nd end ID
Message Frame When the end criterion is "fixed
3
Length
message frame length", the
number of bytes making up a
message frame is defined.
Point-to-point connection CP 440 Installation and Parameter Assignment
A5E00057742-02
Description
Number of Characters
Character
2nd end ID
Configuring and Parameterizing the CP 440
Value Range
On Expiry of Character
Delay Time
On Receipt of Fixed
Number of Characters
On Receipt of End
Character
1 to 65535 ms
The shortest character delay
time depends on the
transmission rate
bps Character time
delay (ms)
300 130
600 65
1200 32
2400 16
4800 8
9600 4
19200 2
38400 1
57600 1
76800 1
115200 1
2
7 data bits :
0 to 7FH (hex)
2
8 data bits :
0 to FFH (hex)
2
7 data bits :
0 to 7FH (hex)
2
8 data bits :
0 to FFH (hex)
1 to 200 (bytes)
Default Value
On Expiry of
Character
Delay Time
4 ms
3 (03H =
ETX)
0
200
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