Balluff BIS M-4008-048-0 ST4 PROFINET Series, Operating Manual, Page: 77 / 232

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BIS M-4008-048-0xx-ST4
PROFINET
29
1. Read 30 bytes at read/write head, start address 10
Once enough data has been read to fill the input buffer of R/W head1, the data will be carried
over to the input buffer.
The AE bit is not set until the compact processor unit has finished the “Read” operation.
The reply “Job end” (AE bit) is reliably set no later than before the last data has been sent.
This time point depends on the requested volume of data and the time response of the
controller. In the example, the use of italics for “
Set AE bit ” calls your attention to this fact.
Controller Identification system
1. Process output buffer
(note sequence):
2. Process input buffer
(note sequence):
01
hex
Command designator 01
hex
00
hex
/0F
hex
Set AA bit
02
hex
Start address 0A
hex
01…0E
hex
Enter first 14 bytes
03
hex
Start address 00
hex
00
hex
/0F
hex
Invert TO bit
04
hex
No. of bytes 1E
hex
00
hex
/0F
hex
Set AE bit
05
hex
No. of bytes 00
hex
00
hex
/0F
hex
Set AV bit
3. Process input buffer: 4. Process input buffer:
01…0E
hex
Copy first 14 bytes 01…0E
hex
Enter second 14 bytes
Process output buffer: 00
hex
/0F
hex
Invert TO bit
00
hex
/0F
hex
Invert TI bit 00
hex
/0F
hex
Set AE bit
5. Process input buffer: 6. Process input buffer:
01…0E
hex
Copy second 14 bytes 01…02
hex
Enter last bytes
Process output buffer: 00
hex
/0F
hex
Invert TO bit
00
hex
/0F
hex
Invert TI bit 00
hex
/0F
hex
Set AE bit
7. Process input buffer: 8. Process input buffer:
01…02
hex
Copy last bytes 00
hex
/0F
hex
Reset AA and AE bits
Process output buffer:
00
hex
/0F
hex
Reset AV bit
7.4 Examples
7
Device Function