Siemens DP/AS-Interface Link 20E Manual page 136

Dealing with Problems/Error Displays
Table 5-1 , continued
Error
The CER display flickers, in other
words a configured slave is lost
sporadically.
The DP/AS-i Link 20E module
does not switch from the configu-
ration mode to the protected
mode.
The DP/AS-i Link 20E module
does not switch from the protected
mode to the configuration mode.
After failure of an AS-i slave, the
"AUP" display remains off.
136
Possible Cause
An AS-i slave was connected
whose configuration data (I/O
configuration, ID code) do not
match the values of the
configured AS-i slave.
Short circuit on the AS-i cable
Bad contact
Interference on the AS-i cable.
Cyclic data exchange with the DP
master is active.
The SET button was not pressed
long enough.
An AS-i slave with address 0 is
connected to the AS-i cable.
The DP/AS-i Link 20E module
cannot switch to the protected
mode as long as this slave exists.
Cyclic data exchange with the DP
master is active.
The SET button was not pressed
long enough.
The DP/AS-i Link 20E module is
in the configuration mode.
More than one AS-i slave has
failed.
Remedy
Check whether the wrong slave
has been connected. If necessary,
reconfigure the DP/AS-i Link 20E
module.
Check the AS-i cable and the con-
nected AS-i slaves.
Check the electrical connections
of the AS-i slaves.
Check the correct grounding of
the DP/AS-i Link 20E module and
check the AS-i cable. Check that
the shield of the AS-i power sup-
ply unit is connected correctly.
Interrupt the connection to the DP
master (by unplugging the bus
connector) or switch the DP ma-
ster to STOP.
Press the SET button for at least
0.5 seconds.
Remove the AS-i slave with ad-
dress 0.
Interrupt the connection to the DP
master (by unplugging the bus
connector) or switch the DP ma-
ster to STOP.
Press the SET button for at least
0.5 seconds.
"Automatic Programming" is not
possible in the configuration
mode.
Program the address of the new
AS-i slave with the address pro-
grammer or using the command
interface of the DP/AS-i Link 20E.
Check the AS-i cable.
If "APF" is displayed at the same
time, check the power supply on
the AS-i cable.
If more than one slave is defec-
tive, program the address on the
replaced slaves using the addres-
sing unit.
DP/AS-Interface Link 20E
Release 11/2002
C79000-G8976-C138–04