Editing Profibus (section)

==== Fields ====
{| class="wikitable" border="1"
| '''SD'''
| Start Delimiter
|-
| '''LE'''
| Length of protocol data unit, (incl. DA, SA, FC, DSAP, SSAP)
|-
| '''LEr'''
| Repetition of length of protocol data unit, (Hamming distance = 4)
|-
| '''FC'''
| Function Code
|-
| '''DA'''
| Destination Address
|-
| '''SA'''
| Source Address
|-
| '''DSAP'''
| Destination [[Service Access Point]]
|-
| '''SSAP'''
| Source [[Service Access Point]]
|-
| '''PDU'''
| Protocol Data Unit (protocol data)
|-
| '''FCS'''
| [[Frame check sequence|Frame Checking Sequence]], calculated by simply adding up the bytes within the specified length. An overflow is ignored here.
|-
| '''ED'''
| End Delimiter (= 0x16)
|}