Contact Specification; Saving The Alarm Signal - Hitachi J300 Series Instruction Manual

• The failure alarm signal is generated from the terminal AL0 and AL1 when a failure hap-
pens. At this time the contents of the failure are displayed on the digital operator.
• Whether the alarm terminal output is to be turned on or off during normal run can be
selected by the extension function
The alarm output terminals at initial setting are as follows (1).
The alarm output terminals are valiable as follows (2) by setting
During normal operation
AL2 AL1
Contact Power Operation
b
(initial
setting)

• Contact specification

• Saving the alarm signal

When an alarm signal is outputted, the alarm signal data is stored even if the input power is
turned off and the contents can be checked by turning the power on once again. However,
when the input power is turned off, the inverter control power is also turned off. As a
result, when the power is turned on next, the alarm contact output is reset (deleted). There-
fore, when saving the alarm contact output, let the external sequence receive and save it
and then turn off the inverter input power.
• When the alarm contact output is set ON during normal run, a time delay occurs until the
contact is closed when the power is turned on. Therefore, when using the alarm contact
output, set a time delay of about 2 seconds when the power is turned on.
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(1) Contact b
At occurrence of an
alarm or power off
AL0
AL2
AL0-AL1
Status
ON Normal Closed
ON Abnormal Open
OFF
Ñ Open
Maximum
250 VAC 2.5 A (Resistor load) 0.2 A (cos¿=0.4)
30 VDC 3.0 A (Resistor load) 0.7 A (cos¿=0.4)
Working voltage: Max. 50 V
.
During normal operation
or at power off
AL1 AL0 AL2
Contact Power
AL0-AL2
Open
a
Closed
Closed
6-5
.
(2) Contact a
At occurrence of an alarm
AL2
AL1 AL0
AL0-AL1
Operation
Status
ON Normal Open
ON Abnormal Closed
OFF
Ñ Open
Minimum
100 VAC 10 mA
5 VDC 100 mA
AL1 AL0
AL0-AL2
Closed
Open
Closed