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1.8.2
Status display
Meaning of the 7 status LEDs
The 7 status LEDs have the following meaning:
Table 1-3
Meaning of the status LEDs
LED (color)
Status
BF (red)
Bus Failure
SF (red)
System error
PWR (green)
Power
APF (red)
AS-i Power Fail
CER (yellow)
Configuration
Error
AUP (green)
Autoprog
available
DP/AS-Interface Link 20E
Release 08/2008
C79000-G8976-C235−01
Technical description, installation instructions, operation
Indicates errors on PROFIBUS DP.
S
The LED is lit when the connection between the DP master and
the DP/AS-i Link 20E is interrupted or the DP master is inactive;
S
The LED flashes when the DP/AS-i Link 20E was not or was
incorrectly configured or assigned parameters by the DP master.
The LED is lit, ...
S
When a diagnostic interrupt (entering state) was triggered in
protected mode;
S
When the DP/AS-i Link 20E has detected an internal error (for
example EEPROM defective).
S
When while pressing the SET button, the DP/AS-i Link 20E cannot
currently make the required mode change (for example a slave
exists with address 0).
The LED is lit when the DP/AS-i Link 20E is supplied with power.
This indicates that the voltage supplied to the AS-i cable by the AS-i
power supply unit is unstable or too low.
Note:
The DP AS-i Link 20E is supplied entirely from the AS-Interface. You
can recognize a total outage of the AS-i power when the "PWR" LED
is not lit.
This LED indicates whether the slave configuration detected on the
AS-i cable matches the expected configuration on the
DP/AS-i Link 20E. If they do not match, the "CER" LED is lit.
The "CER" LED lights up, ...
S
When a configured AS-i slave does not exist on the AS-i cable (for
example failure of the slave).
S
When an AS-i slave exists on the AS-i cable but it was not
previously configured.
S
When a connected AS-i slave has configuration data (I/O
configuration, ID code) that is different from the AS-i slave
configured on the DP/AS-i Link 20E;
In protected mode of the DP/AS-i Link 20E, the LED shows that
automatic address programming of an AS-i slave is possible. The
automatic address programming makes it much easier to exchange a
defective AS-i slave on the AS-i cable (for more detailed information
refer to Section 5.1).
Meaning
21
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