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Basic Principles of Serial Data Transmission
2.4 Data Transmission with the 3964(R) Procedure
Sending with the 3964(R) procedure
The figure below illustrates sending with the 3964(R) procedure.
Sending with pro ced u re 3964(R )
S end request
G
5
6
Yes
No
Own priority high ?
4
Initialization conflict,
own priority low
G
Figure 2-7
Flow diagram of sending with the 3964(R) procedure
36
1
W = 1
A = 1
Send S T X
Add Q VZ
Character
received ?
ja
S T X
faulty, not DLE or
Z
STX
D LE
Send character with
DLE doubling
Intercom ?
No
Yes
More characters
to send ?
Yes
Send D LE E T X
With B C C
3964(R ) ?
No
Add Q V Z
Character
received ?
ja
D LE
Faulty, not D LE
Z
Yes
No
A > A m ax ?
A + 1
No
Q V Z
No
expired ?
Yes
Yes
With N A K ?
No
Send N A K
Yes
Send B C C
No
QVZ
No
expired ?
Yes
G
Send N A K
Yes
No
W > W m ax ?
W + 1
Yes
PtP coupling and configuration of CP 340
Manual, 04/2011, A5E00369892-03
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