Protocols for position value output
Leuze electronic
BPS 8
103
TNT
35/7-2
4
V
Description
AZ0
…
AZ7
are the address bits. If several BPS 8 operate in an RS 485 network, an
address configuration is required. Every BPS 8 is supplied with the
Standard address 81
d
.
The address assignment (Default: 81
d
) is performed using the
BPS Configuration Tool
(see chapter 8.5.3 "Communication").
Byte
Bit
Name
Function
Description
0
0…7
AZ0
…
AZ7
Target address of the BPS in
the
RS 485 network
Permissible address range: 2
d
… 255
d
, default address = 81
d
8
–
None
Without function, bit permanently set to 1
1
0…7
AQ0
…
AQ7
Source address of the host in
the
RS 485 network
Permissible source addresses: 1
d
or 129
d
8
–
None
Without function, bit permanently set to 0
2
0…7
L0
…
L7
Length
Length of the response telegram (number of data bytes + status
byte),
permissible value: 5
d
(4 data bytes +1 status byte in the
response)
8
–
None
Without function, bit permanently set to 0
3
0…7
F0
…
F7
Function identifier
The function identifier describes the action which should be exe-
cuted in the BPS and answered:
90
d
(5A
h
) = Request position data
91
d
(5B
h
) = Request one-time transmission of position data
92
d
(5C
h
) = Activate positioning mode
8
–
None
Without function, bit permanently set to 0
4
0…7
S0
…
S7
Control byte
For future function extensions.
Not currently evaluated
.
8
–
None
Without function, bit permanently set to 0
5
0…8
Checksum
Check sum
Bitwise exclusive OR combination of bytes 0 … 4
NOTE
RS485 network!
An MA 8-01/MA 8-02 connection unit is mandatory for the operation of the BPS 8 in an
RS485 network (see chapter 4.2 "MA 8-01 / MA 8-02 connection unit").