Siemens SPC3 - Page 64

PROFIBUS Interface Center SPC3
Page 62 V1.3 SPC3 Hardware Description
2003/04 Copyright (C) Siemens AG 2003. All rights reserved.
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.
Bit 7 Bit 6 Bit 5-0
Header Byte
0 1
Block length in bytes including header
Bit Structure 1 1


 Identifier Byte 7 has etc. 

 Identifier Byte 0 has
diagnostics diagnostics
Channel-Related Diagnostics:
In this block, the diagnosed channels and the diagnostics cause are entered in sequence. Three bits are
required per entry.
Bit 7 Bit 6 Bit 5 Bit 4 - 0
Header Byte
1 0
Identification Number
Channel Number Coding
Input/Output
Channel Number
Type of Diagnostics Coding
Channel Type
Coding
Error Type
Coding of the error type is in part manufacturer-specific; other codings are specified in the Standard.
Example:
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.
0
0
0
0
0
1
0
0
Device-related diagnostics.
Device-specific Meaning of the bits
diagnostics field of is specified
length 3 manufacturer-specific.
0
1
0
0
0
1
0
1
Identifier-related diagnostics.
1
Identification number 0 has diagnostics.
1
1
Identification number 18 has diagnostics.
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.