Channel Diagnostics - WAGO -I/O-SYSTEM 750 Technical Description, Installation And Configuration

80 • PROFINET IO 750-340
Diagnostics
The BlockType in the head structure of the data set corresponds to the value
for the channel diagnostics (0x0010). The length defines the following
diagnostics data for faulty sub-modules or channels.
The data for the channel diagnostics is triggered using a general structure (see
ChannelDiagnosis or ExtChannelDiagnosis), which is followed by
the fault indication of the respective channels. The general structure has a
length of 10 bytes and is composed of as follows:
Byte-
offset
0 / 1
2 / 3
4 / 5
6 / 7
8 / 9
As already mentioned, special data sets of faulty sub-modules or channels are
following the general structure. This information may be repeated depending
on how many different fault messages exist for the channels of a sub-module.
The number of existing channel diagnostics data sets can be determined using
the length indicated in the head structure.
The following sub-chapters describe the standardized and extended channel
diagnostics information that is supported by the coupler.
3.1.7.2.1.1

Channel Diagnostics

The channel diagnostics is set by the coupler when external channel faults
occur (e.g. short circuits or overvoltage). These types of faults are defined in
the PROFINET IO specification.
The fault type (SubStructureDefined) contains the value for channel
diagnostics (0x8000).
Each fault of a signal channel or sub-module is described in a data set (see
ChannelDiagnosisData). The structure of the data set has 6 bytes and is
composed of as follows:
Data type
WORD
WORD 0x00 0x01
WORD 0x80 0x00
BYTE 0x08
BYTE 0x00
WORD
Description
Module slot for the alarm source
0 ... 128
Range
Sub-module slot for the alarm source = 1
ID of the alarm source = sub module (0x8000)
Fault type = upcoming fault (0x08)
Reserved (0x00)
Fault type = diagnostics for the sub module
0x8000 Channel Diagnostics
0x8002 Extended channel diagnostics
WAGO-I/O-SYSTEM 750
PROFINET IO