Lenze I/O system 1000 - Page 92

Lenze · I/O system 1000 · Reference Manual · DMS 5.0 EN · 09/2016 · TD17 92
5 CANopen communication
5.3 Transmitting process data
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Digital-I/O EPM-S207, EPM-S310 – time stamp function (example)
( 20)
FIFO memory status EPM-S310
Bit Name Function
0 ... 5 RN-LAST Running number of the time stamp entry that was recognised as valid last
by the module and written into the FIFIO memory.
6 1 (fix); is used for identification in the process image
7 0 (fix); is used for identification in the process image
8 ... 13 RN_NEXT Running number of the time stamp entry which is processed next in the FIFO
memory.
14 1 (fix); is used for identification in the process image
15 1 (fix); is used for identification in the process image
16 ... 23 STS_FIFO FIFO memory state information
• 0x00 or 0x80: Everything is OK; you will receive this message directly
after the transfer to the FIFO memory of the module.
• 0x01 or 0x81: No follow-up entry available, the running number does not
correspond to the expected running number. Check the running number
in the output area.
• 0x02 or 0x82: No new entries available in the FIFO memory.
• 0x03 or 0x83: FIFIO memory full. No new entries possible.
A full memory will not accept any more time stamp entries. Perform a status
query to establish the FIFO memory's status before transferring more time
stamp entries.
Note:
If less than possible time stamp entries are written, bit 6 must be set in the
"running number" of the last time stamp entry. This is required in order to
not write the follow-up entries as "invalid" since the module ignores all time
stamp entries after an entry with a set RN bit 6. If a time stamp entry with a
running number and a set bit 6 is in the FIFO memory, STS_FIFO with 0x80 is
returned in an OR-ed manner.
24 ... 31 – Current number of time stamp entries in FIFO memory.