7-3
7.2 What the Battery Does (GT30)
Function of the battery
Internal GT11 data is backed up in the following ways:
Screen data
GT30 configuration data
Stored in the F-ROM.
(No battery backup required)
Hold PLC Device data
Clock data
GT internal device hold data
Alarm history data
Stored in the SRAM.
(Backed up by battery in option card)
In order to prevent the battery from discharging, an insulation sheet is inserted.
5
Before turning on the power, always remove the insulating sheet.
As noted above, in order to back up the various types of data stored in the SRAM, the insulation sheet
should always be removed before turning on the power supply.
Explanation of this function:
Battery performance
Battery performance, when operating at a normal temperature of 25°C, a normal humidity of 65% RH,
and a voltage of 24 V DC, is as follows.
Item Details
Service life Approx. 2 years
Battery type Button type lithium battery CR2032 (commercial item)
Note:
• If the battery voltage drops too low, the BAT LOW flag of the basic communication area map goes on.
If the battery has run down completely, the BAT flag of the basic communi cation area map goes on.
Please be aware that the BAT flag goes on the first time that the power supply is turned on after the
unit is purchased, even though the battery insulation sheet has been removed.
• When replacing the lithium battery, insert the new battery within 20 seconds of removing the old one.
• Battery Error Display
It can be specified in the GTWIN configuration settings, whether or not a dead battery mark will be
displayed on the GT11 screen if the voltage of the internal battery drops too low
• Off:
• On:
The dead battery mark (
) is not displayed.
The dead battery mark (
) is displayed.
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