Siemens SIMATIC Ident Function Manual page 38

Parameterizing
3.2 RFID commands
Programming
There are two programming methods.
● Continuous reading (processing) of each passing transponder. After the CM is
Figure 3-2
When permanent command repetition is used, data may be transferred to FB 45 slower than
new tags are being processed (fast tag sequence, slow data transmission). In this case, the
results are temporarily stored on the CM. The CM or reader has a number of buffers for this
intermediate storage. When the buffers are full and FB 45 has not fetched data and
additional tags arrive, these tags are no longer processed.
Table 3- 16
SLG U92
SLG D10S
SLG D11S/D12S
RF300 reader
One buffer can hold up to 233 bytes of user data.
38
programmed with a command, "repeat_command" is set and remains set. The following
diagram shows the primary states.
Continuous reading of each passing tag/transponder (repeat_command remains set)
Readers that support command repetition
Device type No. of buffers per channel
150
100
1
246
Function Manual, 07/2012, J31069-D0166-U001-A4-7618
Max. user data which can be
processed with command
repetition
34950 byte
23300 byte
233 byte
57318 byte
FB 45 for MOBY U, MOBY D, RF200, RF300