7 Inspection and Maintenance
7-12
CJ2 CPU Unit Hardware User’s Manual
Additional Information
Example of Using the Alarm Output:
Monitoring Power Supply Replacement Notification in the System (6 Months or Less Until
Replacement Is Required)
The Flag is programmed to allow for the delay in the alarm output at system startup. The Flag
does not turn ON when the alarm output is ON (normal operation). When the alarm output turns
OFF (replacement required), the Flag turns ON, and the replacement notification can be moni-
tored from the system.
z Maintenance Function Using the TEST Switch
• Press the TEST switch for at least 3 seconds to display “A02” and force the alarm output OFF.
Release the switch to return to normal operating status.
The TEST switch is used initially or periodically to check the connection status between the alarm
output and external devices.
• Press the TEST switch for less than 3 seconds to display the unit version information for the
Power Supply Unit.
Precautions for Correct UsePrecautions for Correct Use
• Replace the Power Supply Unit within 6 months when the display on the front panel of the
Power Supply Unit alternates between 0.0 and A02 or the alarm output automatically turns
OFF.
• Maintain an ambient storage temperature of −20 to 30°C and humidity of 25% to 70% when
storing the product (with the power turned OFF) for longer than 3 months to keep the replace-
ment notification function in optimum working condition. The replacement time is calculated
from when the power is turned ON only. The precision of the replacement period will decline if
the electrolytic capacitor deteriorates during storage.
z Normal Display: Replacement Notification Display
When 6 months or less are remaining until replacement is required, the display will alternate
between “0.0” and “A02” (in 2 second intervals), and the alarm output will turn OFF.
Display and Alarm Output Operation
T000
TIM 000 5 s
ON
OFF
Alarm output
Turns OFF when 6 months remains
Alarm output
Internal Flag
ON OFF
Remaining service life:
1 year to 6 months
Remaining service life: 6 months max.
Alarm output
2 s 2 s 2 s 2 s 2 s
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