33
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 collector output terminals [11], [12], or the
relay outputs.
The most common (and default) use of the relay is for 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).
Option
Code
Terminal
Symbol
Function Name
State
Description
ON
when an alarm signal has occurred and has not
been cleared
05
AL Alarm
Signal
OFF
when no alarm has occurred since the last clearing
of alarm(s)
Valid for inputs:
11, 12, AL0 – AL2
Required settings
C031
,
C032
,
C036
Notes:
•
By default, the relay is configured as normally
closed (
C036
=
01
). Refer to the next page for an
explanation.
•
In the default relay configuration, an inverter
power loss turns ON the alarm output. the alarm
signal remains ON as long as the external control
circuit has power.
•
When the relay output is set to normally
closed, a time delay of less than 2 seconds occurs
after powerup before the contact is closed.
•
Terminals [11] and [12] are open collector
outputs, so the electric specifications of [AL] are
different from the contact output terminals [AL0],
[AL1], [AL2].
•
This signal output has the delay time (300 ms
nominal) from the fault alarm output.
•
The relay contact specifications are in “Control
Logic Signal Specifications” on page 4–6. The
contact diagrams for different conditions are on
the next page.
Example for terminal [11] (default output
configuration shown see page 59):
Example for terminal [AL0], [AL1], [AL2] (requires
output configuration see page 59):
See I/O specs on
page 16,17.
Run
Stop
RUN
STOP
RESET
Trip
STOP
RESET
Fault
Fault
Alarm signal active
RY
Inverter output
terminal circuit
CM2
11
AL
AL1
Power
supply
Load
AL0
AL2
Inverter logic
circuit board
AL
