1070 072 449-102 (01.12) GB
DP Diagnostic Information 8-1
8 DP Diagnostic Information
The RM2-DP12 module supports standard diagnostic information and the
extended diagnosis possibilities of the PROFIBUS-DP. Among the
extended diagnostic information, the RM2-DP12 supports the "identifier-
related diagnosis", i.e. that for each I/O module 1 bit is reserved in the
diagnostic buffer, which can indicate if the I/O module is under diagnosis
or not. The 'device- or channel-related diagnosis' provided in the
PROFIBUS standard is not supported by the RM2-DP12.
In case of a diagnosis, the diagnostic information will be made available
to the DP master module (master class 1) or to the programming device
(master class 2, e.g. for display on the DP monitor) via the PROFIBUS-
DP. In addition, status '1' will be displayed on the 7 segment display as a
group message for 'diagnosis is pending'.
Diagnostic information overview:
[Byte] Function
[0] Station_Status_1
[1] Station_Status_2
[2] Station_Status_3
[3] Master_Add
[4] Ident_High
[5] Ident_Low
[6] Header for external diagnosis
[7-12] 6 bytes external diagnosis
Coding of the identifier-related diagnosis:
Byte
no.
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Significance
6
0 1 0 0 0 1 1 1 Header byte
7
x7 x6 x5 x4 x3 x2 x1 x0 Module no.: 0-7
8
x15 x14 x13 x12 x11 x10 x9 x8 Module no.: 8-15
9
x23 x22 x21 x20 x19 x18 x17 x16 Module no.: 16-23
10
x31 x30 x29 x28 x27 x26 x25 x24 Module no.: 24-31
11
x39 x38 x37 x36 x35 x34 x33 x32 Module no.: 32-39
12
x47 x46 x45 x44 x43 x42 x41 x40 Module no.: 40-47
Identifier-related diagnosis:
A set bit means that in this I/O range a diagnosis is pending.
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