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L100 Inverter
Operations
and Monitoring
4–27
Alarm Signal
The inverter alarm signal is active when a fault has
occurred and it is in the Trip Mode (refer to the
diagram at right). When the fault is cleared the
alarm signal becomes inactive.
We must make a distinction between the alarm
signal AL and the alarm relay contacts [AL0],
[AL1] and [AL2]. The signal AL is a logic
function, which you can assign to the open collec-
tor output terminals [11] or [12]. The relay is
dedicated to the function AL, thus the labeling of its terminals. Use an open collector
output (terminal [11] or [12]) for a low-current logic signal interface or to energize a
small relay (50 mA maximum). Use the relay output to interface to higher voltage and
current devices (10 mA minimum).
RUN
STOP
RESET
STOP
RESET
Run Stop
Trip
Fault
Fault
Alarm signal active
Option
Code
Terminal
Symbol
Function Name
Output
State
Description
05 AL Alarm Signal ON when an alarm signal has occurred and has not
been cleared
OFF when no alarm has occurred since the last
clearing of alarm(s)
Valid for outputs:
11, 12
Required settings: C_33
Notes:
•
When the alarm output is set to normally closed, a
time delay of less than 2 seconds occurs until the
contact is closed when the power is turned ON.
• Terminals 11 and 12 are open collector outputs, so
the electric specifications of [AL] are different
from the contact output terminals [AL0], [AL1],
[AL2].
• When the inverter power supply is turned OFF, the
alarm signal output is valid as long as the external
control circuit has power.
• This signal output has the delay time (300 ms
nominal) from the fault alarm output.
• The relay contact specifications are in “Specifica-
tions of Control and Logic Connections” on
page 4–6. The contact diagrams for different condi-
tions are on the next page.
Example for terminal [11] or [12] (requires
output configuration—see page 3–36
):
RY
+
–
Example for terminals [AL0], [AL1], [AL2]
(default output configuration shown—
see page 3–36
):
See I/O specs
on page 4–6
.
12 11LH O
OI FM
CM2
Inverter logic
circuit board
Relay position
shown is during
normal running
(no alarm).
AL0
AL2AL1
AL
Inverter output
terminal circuit
AL
Load
Power
supply