Interbus S buscoupler with extended diagnostics
The Interbus S buscoupler with no.
Different from the standard buscoupler, a word for diagnostic messages is put into the input data process image and a word for the control of the diagnostic input is put into the output data process image.
The maximum number of input and output modules is reduced by the additional diagnostic function because Interbus S transmits only 31 words of a process image.
Order of the diagnostic status word:
Bit of the | 15 | 14 | 13 | 12 | 11 | 10 |
status word |
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| error | error code (s. table) | ||||
9
8
7 | 6 | 5 | 4 | 3 |
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Channel | Module |
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2
1
0
The error code is shown in the following table:
Error code
0
5
10
15
Description
unknown fault
defective fuse
broken wire
short circuit
Channel: This is the location for the fault input of a module. The counting is done in the same way as numbering channels.
Module: This is the number of the module. Counting starts at the fieldbus coupler. The first module attached to the coupler is module 0.
The diagnostic control word is for diagnostic actions. E.g. error messages can be cleared in this way.
Order of the diagnostic control word:
Bit of the control word
15 | 14 | 13 |
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Actions
12
11
10
9
8
7
6
5
4
3
2
1
0
The actions are coded as follows:
Actions
0x00 (0)
0x01 (1)
0x80 (128)
Description
no action
Acknowledge diagnostic control word
Clears all error messages in the buffer
INTEBUS S / Enclosure and specifications | 10 |
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