Local Bus Failure; Device Diagnostics - WAGO 750-333/040-000 Manual

WAGO I/O SYSTEM 750 XTR
750-333/040-000 FC PROFIBUS G2 12MBd XTR
9.2.2

Local Bus Failure

'I/O' LED indicates a local bus failure.
'I/O' LED flashes red:
When a local bus failure occurs, the fieldbus coupler generates an error message
(error code and error argument).
A local bus failure occurs, for example, if an I/O module is removed.
If the error occurs during operation, the output modules operate as they do during
a local bus stop.
If the local bus error is resolved, the coupler starts up after turning the power off
and on similar to that of a normal start-up. The process data is transmitted again
and the outputs of the node are set accordingly.
9.3

Device Diagnostics

Device diagnostics of the fieldbus coupler includes max. 128 bytes and is made
up of several diagnostic structures. In addition to the 6-byte standard diagnostics,
the 7-byte including device status is always contained in the diagnostics frame.
The following diagnostics objects are optional:
•
Identifier-related diagnostics
(2 ... 9 byte length depending on the parameterization of the station proxy
and if necessary, by the number of configured I/O modules)
•
Module status
(5 ... 20 byte length depending on the parameterization of the station proxy
and if necessary, by the number of configured I/O modules)
•
Channel-specific diagnostics
(3 bytes per message, up to 38 messages depending on the
parameterization of the station proxy and by the number of configured I/O
modules)
•
Status messages
(8 bytes per message, up to 14 messages depending on the
parameterization of the station proxy and by the corresponding I/O
modules, as well as the number of channel-specific diagnostics present)
•
iPar server notification
(temporary 20 byte length, for I/O modules with iPar client functionality only,
e.g. exclusively available for the F I/O modules 75x-661/000-003,
75x- 662/000-003, 75x-666/000-003 and 75x-667/000-003 with
corresponding configuration or parameterization.)
Diagnostics 107
Manual
Version 1.4.0