202 Diagnostics
WAGO-I/O-SYSTEM
750
750-880, 750-880/025-000 ETHERNET Programmable Fieldbus Controller
Manual
Version 1.0.1
Pos: 88.25 /Serie 750 (WAGO-I/O-SYSTEM)/Diagnose/Feldbuskoppler/-controller/Klemmenbusfehler (alle Controller) @ 6\mod_1259322394765_21.doc @ 45998 @ 3 @ 1
11.2.2 Internal Data Bus Failure
I/O LED indicates an internal bus failure.
I/O LED flashed red:
When an internal data bus failure occurs, the fieldbus controller generates an error
message (error code and error argument).
An internal data 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
an internal data bus stop.
If the internal data bus error is resolved, the controller 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.
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If the 'KBUS_ERROR_INFORMATION' function block is evaluated in the
control program, then the 'ERROR','BITLEN', 'TERMINALS' and
'FAILADDRESS' output values are relevant.
'ERROR'
= FALSE
= No fault
('BITLEN'
=
Bit
length
of
the internal bus shift register
'TERMINALS'
= Number of I/O modules)
'ERROR'
= TRUE
= Internal Bus Error
('BITLEN'
=
0
'TERMINALS'
=
0)
'FAILADRESS'
= Position of the I/O module after which the
internal bus interruption arose, similar to the
flashed error argument of the I/O LED
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