Configuring and Parameter Assignment the CP 440
5.4 Configuration data
Point-to-point connection CP 440 Installation and Parameter Assignment
70
Manual, 09/2007, A5E00057742-03
5.4.3
Configuration Data of the ASCII Driver
Introduction
Using the configuration data of the ASCII driver, you can adjust the CP440 to suit the
communication partner.
Configuration Data of the ASCII Driver
With the CP 440: Point-to-Point Communication, Parameter Assignment interface, specify
the parameters for the physical layer (layer 1) of the ASCII driver. Below you will find a
detailed description of the parameters.
Note
The ASCII driver can be used in four-wire mode (RS 422) and two-wire mode (RS 485). At
parameter assignment, you must specify the type of interface (RS 422 or RS 485).
Protocol Parameters
The table below describes the protocol parameters.
Table 5-5
Protocol Parameters (ASCII Driver)
Parameters
Description
Value Range
Default Value
Indicator for end of
receive message
frame
Defines which criterion signals the end
of each message frame.
•
After expiration of the
character delay time
•
After receipt of a fixed
number of characters
•
On receipt of end-of-text
character
After expiration of the
character delay time
Character delay time The character delay time defines the
maximum permitted time between 2
consecutively received characters.
•
1 to 65535 ms
The shortest character delay
time depends on the
transmission rate
4 ms
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