Siemens NCM S7 Manual page 156

Programming FCs (Functions) and FBs for S7 Ethernet CPs
Parameter Declara-
tion
LEN INPUT
DONE OUTPUT
ERROR OUTPUT
STATUS OUTPUT
Condition Codes
The following table shows the condition codes formed by the DONE, ERROR and
STATUS parameters that must be evaluated by the user program.
156
Type Possible
Values
INT On ISO
Transport and
ISO-on-TCP /
TCP:
1,2, to 32767 1 2 t 32767
(or up to "length
specified for
SEND
parameter")
On UDP:
1,2,...2048 (or 1,2,...2048 (or
up to "length
specified for
SEND
parameter")
BOOL 0: Job active
1: done
BOOL 0: –
1: error
WORD see following
table
Remarks
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.
S
Note the block type:
– 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).
– S7-400
With FC AG_SEND, the data area is
restricted to a maximum of 240 bytes.
S
Note 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/
S
Improved performance with shorter data
records:
Transfer of data records up to 240 bytes
results in better performance regardless of
the block type used.
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.
For the meaning of this parameter in
conjunction with the DONE and STATUS
parameters, refer to the follow table.
Status code
The following table shows the condition codes
formed by the DONE and ERROR parameters.
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129–06