Leuze BPS 8 - Page 104

Protocols for position value output
Leuze electronic BPS 8 103
TNT 35/7-24V
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
50…8Checksum 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").