Leuze BPS 8 - Page 102

Protocols for position value output
Leuze electronic BPS 8 101
TNT 35/7-24V
Diagnostic data
By setting the bit F0 in the request byte (bit 3), the diagnostic data are requested.
If at this point the diagnostic bit DB in the status byte is set to 1, the data in the data bytes
correspond to the diagnostic data.
In the response to a diagnostic data request, the bits CALC, DB and SLEEP are set as
follows:
• CALC = 1
• DB = 1
• SLEEP = 0
The diagnostic data are output as an ASCII hex value in the data bytes 1 … 3.
Data byte 1: First diagnostic data character
Data byte 2: Second diagnostic data character
Data byte 3: Third diagnostic data character
Possible diagnostic data:
E01 = interface problem
E02 = motor problem
E03 = laser problem
E04 = internal problem
E05 = position data outside of measurement range
E09 = invalid control bar code
Example: output of diagnostic data
Diagnostic data: E05
Data byte 1 = E = 45
h
= 01000101
b
Data byte 2 = 0 = 30
h
= 00110000
b
Data byte 3 = 5 = 35
h
= 00110101
b
Standby mode
If bit SLEEP (bit 6) in status byte is set to 1, the BPS is in Standby mode. In a diagnostic
response during Standby mode, the bits CALC, DB and SLEEP are set as follows:
• CALC = 0
• DB = 0
• SLEEP = 1
In Standby mode, the data bits P00 to P20 are always 0.
Byte no. Designation Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 Status byte 0
SLEEP=0 A1 A0 CALC=1 DB=1 OUT ERR
1 Data byte 1 01000101
2 Data byte 2 00110000
3 Data byte 3 00110101
4 XOR combination Bitwise exclusive OR combination of bytes 0 to 3