The message end detection parameters are accessible via two zones:
Selecting Stop on silence means that Stop on reception is deselected and vice versa.
NOTE:
To configure a channel in character mode without stop parameters, uncheck Stop check boxes for the following configuration zones:
The
Stop on reception Zone
This configuration zone appears on the screen as shown below:
A reception request can be terminated once a specific character is received.
By checking the Stop option, it is possible to configure Stop on reception to be activated by a specific end-of-message character:
-
CR: enables you to detect the end of the message by a carriage return.
-
LF: enables you to detect the end of the message by a line feed.
-
Data entry field: enables you to identify an end-of-message character other than the carriage return or line feed characters, using a decimal value:
-
Character included: enables you to include the end-of-message character in the reception table of the PLC application.
It is possible to configure two end-of-reception characters. In the above window, the end of reception of a message is detected by a line feed or carriage return character.
This configuration zone appears on the screen as shown below:
This zone enables you to detect the end of a message on reception by the absence of message end characters over a given time.
Stop on silence is validated by checking the Stop box. The duration of the silence (expressed in milliseconds) is set using the data entry field.
The minimal value of this duration is the time corresponding to the transmission of 1.5 characters. Expressed in number of bits, and depending on the configuration of start and stop bits, the minimal silence duration is as follows:
|
Total character length (bit)
|
Minimal silence duration (bit)
|
|
8
|
12
|
|
9
|
12
|
|
10
|
15
|
|
11
|
15
|
Convert the number in right column in time according to the configured speed transmission.
NOTE: The available values range from 1 ms to 10000 ms and depend on the transmission speed selected.
