Siemens Simantic Net NCM for Industrial Ethernet S7 User Manual

Page 150

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Programming FCs (Functions) and FBs for S7 Ethernet CPs

150

SIMATIC NET NCM S7 for Industrial Ethernet

C79000-G8976-C129–06

Table 5-1

ISO Transport

ISO-on-TCP

TCP

UDP

AG_LSEND

(S7-400)

AG_SEND

(S7-300)

8192 bytes

2048 bytes

AG_LRECV

(S7-400)

AG_RECV

(S7-300)

8192 bytes

2048 bytes

Note

For information on the length of the data area you can transfer with older versions
of the Ethernet CPs, refer to the product information bulletin / manual of the
Ethernet CP you are using /1/.

Working without the Job Header

On specified connections, the address and job parameters are specified by the
connection configuration. The user program only provides the user data in the UDP
data area when sending with AG_SEND / AG_LSEND or receives the data with
AG_RECV / AG_LRECV.