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Description byte 1, “Status byte”:
Bit
Value
Description
Remark
C/Qi
0
Input at C/Qi < 8 V
The level of C/Qi is measured by hardware
1
Input at C/Qi > 11 V
The level of C/Qi is measured by hardware
I/Q
0
Input I/Q < 8 V
The level of I/Q is measured by hardware
1
Input I/Q > 11 V
The level of I/Q is measured by hardware
OL
0
L+ o .k .
Set by hardware
1
Overload on L+
Set by hardware
DR-RDY
0
Reading not started or evaluation unit
diagnostics data not ready
-
1
Diagnostics read ready
Diagnostics read response from evaluation unit is ready
and available in byte 2 … 5 .
Diag
0
No diagnostics available .
-
1
evaluation unit diagnostics occurred
Data not yet written in the response buffer . The
response buffer contains still default values 0x00 . The
diagnostics data will be copied in the response buffer,
after detecting that the DR control bit .is set within the
control byte .
Description Byte 2, ”Number of diagnostic events”:
Number of diagnostic events .
(0 = No diagnostics, 1…4 = 1…4 diagnostics event(s))
Description Byte 3…n:
If bit “DR-RDY” within the Status byte is set these bytes contain the error codes of the evaluation unit .
Otherwise these bytes are set to default value 0x00 by the evaluation unit .
If more than one diagnostics event is available this is appended . Up to 4 diagnostics messages could be
transferred . Error codes see chapter 14 .
Description Byte (n+1)…20:
Will be set to default value 0x00 by the evaluation unit .
