Moeller DF51 - Fault Signal (AL); External Fault Signal (EXT)

10/05 AWB8230-1541GB
Monitoring functions
121
Fault signal (AL)
A digital output configured as AL activates when a fault has
occurred.
By default, function AL is assigned to signalling relay K1 (terminals
K11, K12, K14) (PNU C036 = 00).
When the supply voltage is applied, the internal monitoring
functions are scanned. If no fault message is present, K1 is
energized (contact K11-K14 closed). When a fault message is
present (E…), K1 drops out (K11-K12 closed).
X Configure one of the digital outputs 11 or 12 as an AL by setting
PNU C021 or PNU C022 to 05.
When the AL output is configured as a break contact, 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.
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
activated is about 300 ms.
External fault signal (EXT)
A digital input configured as EXT allows the direct inclusion of
external monitoring devices (temperature and vibration
monitoring, limit switches, etc.)
When the digital input configured as EXT is activated, fault
message E12 is issued and output through the communication
interface (RS 485/Modbus). The fault message remains active even
if the EXT input is deactivated again and must be acknowledged
with a reset.
A reset can be carried out with:
• the RST input or
• the Stop key.
• Alternatively, the supply voltage can be switched off and on
again.
X Configure one of the digital inputs 1 to 5 as EXT by entering the
value 12 under the corresponding PNU (C001 to C005).
Default setting of the signalling relay
Fault or DF51 switched off Run signal
Voltage Operating
state
K11-K12 K11-K14
On Normal Open Closed
On Fault Closed Open
Off – Closed Open
Figure 123:Digital output 11 configured as AL (fault occurrence)
K12K11 K14
K12K11 K14
AL
24 V
50 mA
1112CM2
Figure 124:Digital input 1 configured as FWD (start/stop clockwise
operation) and digital input 3 as EXT (external fault)
Figure 125:Function chart for EXT (external fault message)
n
M
: Motor speed
K14: Signalling relay contact K14
a Motor coasts to a stop
Warning!
After a reset, the motor restarts immediately if a start
signal (FWD or REV) is active.
EXT
FWD
P2413
FWD/REV
EXT
n
M
RST
K14
a