Alarm Output - Omron 3G3MX2 User Manual

Using Intelligent Output Terminals
4-6-9

Alarm Output

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 volt-
age and current devices (10 mA minimum).
Option Terminal
Code Symbol

AL Alarm
output
Valid for inputs: 11, 12, AL0 - AL2
,,
Required settings:
Notes:
• By default, the relay is configured as normally closed (=). 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 4-3 Control Logic Signal Specifications on
page 195. The contact diagrams for different conditions are on the next page.
Function State
Name
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)
Section 4-6
STOP
RESET
Run Stop
RUN
STOP
RESET
Trip
Fault
Fault
Alarm signal active
Description
233