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54
MA 258
i
Leuze electronic
10.2
Description of the input bytes (status bytes)
10.2.1
Structure and meaning of the input bytes (status bytes)
Table 10.1:
Structure of the input bytes (status bytes)
Bits of the input byte (status byte) 0
Bits of the input byte (status byte) 1
Notice!
T-bit means toggle bit, i.e. this bit changes its state on each event ("0"
→
"1" or "1"
→
"0").
7
6
5
4
3
2
1
0
ND
BO
DL
BLR
DEX
SMA
W-ACK
Status byte 0
DLC7
DLC6
DLC5
DLC4
DLC3
DLC2
DLC1
DLC0
Status byte 1
Data byte / parameter byte 0
Data
Data byte / parameter byte 1
…
Bit no.
Designation
Meaning
0
W-ACK
Write-Acknowledge (write confirmation when using buffer)
2
SMA
Service mode active(service mode activated)
3
DEX
Data exist (data in transmit buffer)
4
BLR
Next block ready (new block ready)
5
DL
Data loss
6
BO
Buffer overflow
7
ND
New data only in Transparent mode
Bit no.
Designation
Meaning
0 … 7
DLC0 … DLC7
D
ata
L
ength
C
ode (length of the following user data)
