Service manual

METTLER TOLEDO
DIVA Service Manual 41
6.1.3.4 Confidence Test Status Byte Format
When the scale responds with STX? status byte
C
R
, after requesting a confidence test (B), a
confidence test status byte will be sent. The status byte contains scale status information, which
can include net/gross mode, zero status, etc. The actual status byte sent will be an ASCII character
which must be converted to binary to decode the bits. The confidence test status bits are shown in
the following table. Bit 6 is set to 1 after a confidence test is performed and reset to 0 after the host
reads the confidence test status byte. The Confidence Test Byte bit definitions are shown below.
Note: The ASCII @ (decimal 64) indicates all tests were passed. Repeated reads of the confidence
byte for all test passed without initiating a new confidence test will result in an ASCII NULL (hex
00).
Scale Confidence Test Byte Bit Definitions
Bit Number Bit Description
7
Parity Bit (even).
6
1 = New status data available.
0 = Host has read data.
5
Bit is always a 0.
4
1 = ROM test failed.
0 = ROM test passed.
3
1 = Processor RAM test failed.
0 = Processor RAM test passed.
2
1 = Ram Test Failed.
0 = Ram Test Passed.
1
1 = NOVROM test failed.
0 = NOVROM test passed.
0
Always 0.