Siemens SIMATIC S5-115U, User Manual

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Communications Capabilities S5-115U Manual
Table 12-20. Error Codes in the "Coordination Byte for Receive"
*
DLE and STX are control characters for connection buildup and connection cleardown (DLE=Data Link Escape,
ETC=End of Text). In order that the line procedure be able to distinguish a byte of data from a control character that
has the same code (DLE in this case), it automatically doubles the former.
DLE-ETX is a fixed sequence that is required for error-free connection cleardown.
** STX is the control character that establishes a connection with the partner in the communications link (STX=Start of
Text).
Priority Error Code Description Reaction
Parity error
Data rejected
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
03
H
07
H
Input buffer full
09
H
0B
H
0F
H
13
H
Too many frames received
(more than 100)
Frame longer than Receive mailbox
No Receive mailbox
Character delay time ZVZ exceeded
Data valid, subsequent
frames were rejected
Data rejected
Frame delay time BWZ exceeded 15
H
17
H
Checksum error
1B
H
Break
05
H
Frame length is 0
0D
H
DLE not transmitted twice in
succession or no ETX after DLE
*
11
H
STX error: Handshaking did not
begin with STX
**
5
6
2
2
0
3
0
4
2
5
1
3
Note
The location of the Send and Receive mailboxes (DB or flag area) must not be changed
as long as the "Send/Receive permitted" bits are set.
Note
The operating system can set or reset the bits in the coordination bytes after each
statement, without regard to the PLC cycle. This means that multiple scanning of a bit
in one of these bytes in a program cycle may produce different results (caution is called
for in conjunction with edge evaluation!).
12-52
EWA 4NEB 811 6130-02b