09/01 AWB8230-1412GB
Frequency value messages
FA1/FA2
73
Error message AL
The digital output configured as AL activates when a fault has
occurred.
X Program one of the digital inputs 11 or 12 as the AL output, by
setting the value 05 under PNU C21 or C22.
When the AL output is configured as a break contact (default
setting), remember that there is a delay from the time the supply
voltage is switched on until the AL output is closed, and a fault
message relating to the AL output therefore appears for a short
time after the supply is switched on.
Please note that the programmable digital outputs (including the
one configured as AL) are open collector types and therefore have
different electrical characteristics than the signalling relay outputs
(terminals K11, K12 and K14). In particular, the maximum voltage
and current carrying capacity ratings are significantly lower than
those of the relay outputs.
After the frequency inverter supply voltage has been switched off,
the AL output remains active until the DC bus voltage has dropped
below a certain level. This time depends, among other factors, on
the load applied to the inverter.
The delay from the time a fault occurs until the AL output is acti-
vated is about 300 ms.
Figure 75: Digital output 11 configured as AL (fault occurrence)
AL
24 V
50 mA
1112CM2
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