Siemens Simantic Net NCM for Industrial Ethernet S7 - Manual (Page 165)

Programming FCs (Functions) and FBs for S7 Ethernet CPs
165
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129–06
Parameter Remarks Possible
Values
Type Declara-
tion
LEN OUTPUT INT On ISO
Transport and
ISO-on-TCP:
1,2...8192
Specifies the number of bytes accepted from
the Ethernet CP and entered in the data area.
S
Note the block type:
– S7-300
On UDP:
1,2...2048
With older versions of FC AG_RECV (up
to V3.0), the data area is always
restricted to a maximum of 240 bytes.
The current versions allow up to 8192
bytes (2048 bytes for UDP).
– S7-400
With FC AG_RECV, the data area is
restricted to a maximum of 240 bytes.
Condition Codes
The following table shows the codes formed by the DONE, ERROR and STATUS
parameters that must be evaluated by the user program.
Note
For entries coded with 8Fxx
H
in STATUS, refer to the information in the STEP 7
Standard and System Functions reference manual. The chapter describing error
evaluation with the RET_VAL output parameter contains detailed information.
To find out which SFCs are used and are relevant for error evaluation, display the
properties dialog of the FC described here in the “Calls” tab.
Table 5-3 AG_RECV / AG_LRECV Codes
NDR ERROR STATUS Meaning
1 0 0000
H
New data accepted.
0 0 8180
H
There are not yet any data available.
0 0 8181
H
Job active.
0 1 8183
H
No configuration or the ISO transport service has not yet started
on the Ethernet CP.
0 1 8184
H
System error (the source data area is incorrect).
0 1 8185
H
Destination buffer (RECV) is too short.
0 1 8186
H
ID parameter invalid.
ID != 1,2....16 (S7-300).
ID != 1,2....64.(S7-400)