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Leuze electronic
MA 258
i
57
TNT
35/7-2
4
V
Bit 7: New data: ND
This bit is only relevant in Transparent mode.
10.2.3
Detailed description of the bits (input byte 1)
Bit 0 … 7: Data length code: DLC0 … DLC7
10.3
Description of the output bytes (control bytes)
10.3.1
Structure and meaning of the output bytes (control bytes)
Table 10.2:
Structure of the output bytes (control bytes)
Bits of the output byte (control byte) 0
Input data
Description
Addr.
Data
type
Value range
Default
ND
N
ew
d
ata
(new data)
This bit is toggled on each data set that is sent from the gate-
way to the PLC. This can be used to differentiate between
multiple, identical data sets that are sent to the PLC.
0.7
Bit
0->1; 1->0:
On each status
change for new data
0
Input data
Description
Addr.
Data
type
Value range
Default
DLC0 … DLC7
D
ata
l
ength
c
ode
(number of user data in bytes)
Stored in these bits is the number of user data bytes
transmitted to the PLC which follow.
1.0 …
1.7
Bit
1
h
(00001
b
) …
FF
h
(00255
b
)
0h (00000b)
7
6
5
4
3
2
1
0
ND
Address 4
Address 3
Address 2
Address 1
Address 0
Broadcast
Command
mode
Control byte 0
CTB
SFB
R-ACK
Control byte 1
Data byte 1
Data
Data byte 2
…
Bit no.
Designation
Meaning
0
Command mode
Command mode
1
Broadcast
Broadcast
(only relevant with a connected MA 3x)
2 … 6
Address 0 .. 4
Address bits 0 .. 4
(only relevant with a connected MA 3x)
7
ND
New data
