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PROFIBUS Interface Center
Identifier-Related Diagnostics:
For each identifier byte assigned during configuration (for example, 0 x 10 for 1 byte input), a bit is
reserved.
In the case of a modular system with an identifier byte each per module, module-specific diagnostics can be
indicated. One bit respectively will then indicate diagnostics per module.
Header Byte
Bit Structure
Channel-Related Diagnostics:
In this block, the diagnosed channels and the diagnostics cause are entered in sequence. Three bits are
required per entry.
Header Byte
Channel Number
Type of Diagnostics
Coding of the error type is in part manufacturer-specific; other codings are specified in the Standard.
Example:
0 0 0 0 0 1 0 0 Device-related diagnostics.
Device-specific
diagnostics field of
length 3
0 1 0 0 0 1 0 1 Identifier-related diagnostics.
1 Identification number 0 has diagnostics.
1
1
1 0 0 0 0 0 0 0 Channel-related diagnostics, identification number 0.
0 0 0 0 0 0 1 0 Channel 2.
0 0 0 1 0 1 0 0 Overload, channel organized bit by bit.
1 0 0 0 1 1 0 0 Channel-related diagnostics identification number 12.
0 0 0 0 0 1 1 0 Channel 6.
1 0 1 0 0 1 1 1 Upper limit evalue xceeded, channel organized word by word.
Status
If the Bit EXT_DIAG is set to 0 , data is viewed as status info from the system view. f.e. cancellation of the
error triggering the diagnostics.
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2003/04
Bit 7
Bit 6
Bit 5-0
Block length in bytes including header
0
1
1
Identifier Byte 7 has
diagnostics
Bit 7
Bit 6
Bit 5
1
0
Identification Number
Coding
Channel Number
Input/Output
Coding
Channel Type
Meaning of the bits
is specified
manufacturer-specific.
Identification number 18 has diagnostics.
V1.3
SPC3
etc.
Bit 4 - 0
Coding
Error Type
Copyright (C) Siemens AG 2003. All rights reserved.
1
Identifier Byte 0 has
diagnostics
SPC3 Hardware Description
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