Programming FCs (Functions) and FBs for S7 Ethernet CPs
156 SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129–06
Parameter RemarksPossible
Values
TypeDeclara-
tion
LEN INPUT INT On ISO
Transport and
ISO-on-TCP /
TCP:
12 t 32767
Number of bytes to be sent from the data area
with this job. The possible values range from 1
to length specified for the SEND parameter.
SNote the block type:
1,2, to 32767
(or up to “length
specified for
SEND
parameter”)
On UDP:
1,2,...2048 (or
– S7-300
With older versions of FC AG_SEND
(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).
1
,
2
,...
2048 (or
up to “length
specified for
SEND
parameter”)
– S7-400
With FC AG_SEND, the data area is
restricted to a maximum of 240 bytes.
SNote on the S7-400:
Data transfer may be restricted to
LEN<=240 bytes with older versions of the
CP firmware!
For further information, see /1/
SImproved performance with shorter data
records:
Transfer of data records up to 240 bytes
results in better performance regardless of
the block type used.
DONE OUTPUT BOOL 0: Job active
1: done This parameter indicates whether or not the job
was completed without errors.
As long as DONE = 0, no further job can be
triggered. DONE is set to 0 by the CP when it
accepts a new job.
For the meaning of this parameter in
conjunction with the ERROR and STATUS
parameters, refer to the following table.
ERROR OUTPUT BOOL 0: –
1: error For the meaning of this parameter in
conjunction with the DONE and STATUS
parameters, refer to the follow table.
STATUS OUTPUT WORD see following
table Status code
The following table shows the condition codes
formed by the DONE and ERROR parameters.
Condition Codes