Siemens SIMATIC S7-400 CP 440 - Figure 2-4 Sequence of a Send Operation

Basic Principles of Serial Data Transmission
2.4 Data Transmission with the ASCII Driver
Point-to-point connection CP 440 Installation and Parameter Assignment
32 Manual, 09/2007, A5E00057742-03
Send Operation
The figure below illustrates a send operation.
6HQGMREDUULYHG
:DLWLQJIRU
VHQGMRE
6HQGLQJXVHU
GDWD
7KHDPRXQWRIGDWDWR
EHVHQWLVWDNHQIURP
WKH/(1SDUDPHWHURI
WKHVHQGMRE
-RESURFHVVHG
Figure 2-4 Sequence of a send operation
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