NAiS GT10, Technical Manual

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GT10/GT30 8.1 The Internal Secondary Battery (GT10)
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8.1 The Internal Secondary Battery (GT10)
Internal GT10 data is backed up in the following ways:
Screen data
GT10 configuration data Stored in the F–ROM. (No battery backup required.)
Hold PLC Device data Stored in the SRAM. (Backed up by the internal secondary
Clock data
GT internal device hold data battery, which is charged when power is supplied to the GT10.)
The No. 1 operation mode setting switch on the back of the GT10 is used to specify
whether or not the contents of the SRAM are backed up.
Switch no. Function OFF ON
1 SRAM backup using sec-
ondary battery No Yes
2 Inhibits system menu shift Shift possible Shift inhibited
3 Usage inhibited Should always be in the OFF
4
position when unit is used
In order to prevent excessive discharging of the internal secondary battery when the unit is
shipped from the factory, the No. 1 operation mode setting switch is set to the “OFF” position.
Before turning on the power supply, always set the No. 1 operation mode setting
switch on the back of the GT10 to the “ON” position.
In order to back up the various types of data stored in the SRAM, as described above,
the No. 1 operation mode setting switch on the back of the GT10 should always be set
to the “ON” position before turning on the power supply.
GT10
EXPLANATION
* Secondary Battery Performance
Secondary battery performance, when operating at a normal temperature of 25
°
C, a
normal humidity of 65% RH, and a voltage of 24V DC, is as follows:
Item Details
Backup time Min. 10 days when fully charged
Charge time If the power has been off for 24 hours, it takes approx. 15 min. to fully charge.
If the power has been off for 10 days, it takes approx. 2 hrs. to fully charge.
Service life Approx. 7 years
CAUTION
1) Frequent long periods with the power off will decrease the service life
of the secondary battery.
ON
OFF
4 3
MODE
1 2
(status when shipped)
Operation mode setting switches