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Diagnostics and Error Handling
ASi diagnostics
Table 8-3 shows the meanings of the LEDs for ASi diagnostics and describes
the action required to be taken for troubleshooting.
For ASi diagnostics, the DP/ASi link has four LEDs. In the event of a failure,
one or several LEDs are turned on.
Table 8-3
LED display for faults on ASi side
LED on
Reason
ASi POWER FAIL
The ASi power supply
has failed.
CONFIG ERROR
Actual and setpoint con-
figurations are not iden-
tifical.
AUTOPROG AV
Precisely one ASi slave
has failed.
The DP/ASi link is in au-
tomatic programming
mode.
CONFIG MODE
No meaning
8-4
Meaning
Data exchange between the DP/
ASi link and the ASi slave is no
longer possible.
During power up:
"Actual is equal to setpoint
configuration":
no data exchange
"Actual is less than setpoint
configuration":
data exchange possible (re-
fer to section 5.1)
The data exchange continues in
operation.
The fault is caused by:
one ASi slave has been
added
one ASi slave has failed
ASi slave 0 has been added
The lowest address of the failed
ASi slaves is indicated by five
ASi-SLAVE FAIL LEDs.
The DP/ASi link enables one
ASi slave having ASi address 0
automatically to be allocated the
ASi address of the failed ASi
slave.
The ASi address of the failed
ASi slave is indicated by the
five ASi-SLAVE FAIL LEDs.
Remedy
Check the ASi power supply.
Check ASi connections.
Check the ASi slave having the
address indicated.
Check whether a slave type dif-
ferent from that specified in the
parameterization message (dif-
ferent I/O or ID code) is being
used.
Replace the failed ASi slave
with a new ASi slave having the
same I/O code and ID code (re-
fer to section 7.3).
Distributed I/O System DP/ASi Link
EWA 4NEB 710 6055-02b
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