Siemens SIMATIC S7 System Manual page 229

Error code
S7-200 SMART
System Manual, V2.3, 07/2017, A5E03822230-AF
19 One of the following IP address errors have occurred:
The IP address is invalid (for example, address
•
0.0.0.0).
This IP address is the IP address of this CPU.
•
This CPU has IP address 0.0.0.0.
•
The IP address is a broadcast or multicast address.
•
20 A local or remote TSAP error (ISO-on-TCP only)
21 An invalid connection ID (65535 is reserved)
22 An active/passive error (UDP only allows passive)
23 The connection type is not one of the allowed types.
24 There is no operation pending so there is no status to
report.
25 The receive buffer is too small: The CPU received more
bytes than the buffer length supports. The CPU discards
the extra bytes.
31 Unknown error
Description
Program instructions
7.3 Communication
T T T T
C S R D
O E E C
N N C O
D V N
X
X
X
X
X
X X
X
X X X X
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