Maintenance - Omron NV Series Setup Manual

Maintenance

7-1

Maintenance

!WARNING
Backing Up Project Data
Keeping a Spare PT
Replacing the Battery
(NV4W and NV3Q Only)
114
Perform maintenance to keep the NV-series PT in proper working condition.
Do not disassemble the PT or touch any internal components while power is
being supplied. Doing so may result in electric shock.
If the PT should have to be sent out for repairs, it may have to be replaced. Be
sure to back up project data and store it in a safe location.
It is recommended that a spare PT be kept on hand so that the system can be
quickly restored in case of PT failure or if the backlight reaches the end of its
service life.
To hold internal data in the PT even if the PT power supply is turned OFF for
the PT, install a Battery before installing the PT.
Data in internal memory in PT:
Clock data, PLC memory hold data, PT internal memory hold data, and alarm
history data
Battery Models
Mount the following backup Battery.
PT
NV4W Series
NV3Q Series
Low Battery Indicator
If the battery voltage drops, a battery symbol ( ) will be displayed in the lower
right corner of the PT screen.
The low battery indicator can be enabled or disabled in the NV-Designer Con-
figuration. (Refer to the NV-series PT Programming Manual (Cat. No. V104).)
Note The Battery Low Flag in system memory will turn ON if the Battery's voltage
falls. The Battery Low Flag in system memory will turn ON if the Battery is dis-
connected or exhausted. These flags will turn ON once when the power to the
PT is turned ON for the first time after purchase. The flags will operate regard-
less of whether the low battery indicator is enabled or disabled.
Battery Replacement Procedure
When replacing the battery, leave the power ON for at least one minute before
turning it OFF. Replace the battery within one minute after turning OFF the
power.
Note Be sure to replace the battery within one minute after turning OFF the power.
If the new battery is not installed within one minute, data that has been saved
will be lost.
Backup battery specifications
Life expectancy
NV3Q-SW: Approx. 3 yr
NV4W or NV3Q-MR: Approx. 5 yr
(The life expectancy is given for room temperature
and humidity (25°C and 65% humidity) and a power
supply voltage of 24 VDC.
Section 7-1
Model
NV-BAT01