IAI America SCON-CA - Manual (Page 199)

Chapter 7
Absolute Reset and
Absolute Battery
189
7.2 Absolute Battery
An absolute battery is enclosed with the absolute type controller.
The absolute battery is used to back up the absolute data.
Connect the battery to the absolute battery connector on the front panel of the controller.
7.2.1 Absolute encoder backup specifications
Item Specifications
Battery classification Thionyl chloride lithium batteries
Battery manufacturer’s name TOSHIBA HOME APPLIANCES CORP
Battery model (IAI model) AB-5
Battery nominal voltage 3.6V
Current standard capacity 2000mAh
2 years after use (if left unused without power supply to
controller)
Reference for battery replacing timing (Note 1)
(Ambient temperature 40�C)
4 years after use (if 50% of time with power supply to
controller)
Output of voltage drop alert signal *BALM 3.1V (Reference value)
Output of Alarm output *ALM 2.5V (Reference value)
7 days if the controller is operated continuously at 20�C.
Er
ro
r
de
te
ct
io
n (*
1)
Warning � Reference for time suspended
after alert till alarm
2.5 days if the controller is operated continuously at
40�C.
Absolute data retaining duration at battery
replacement
15 minutes (Have the replacing work done within this
time.)
(Note 1) Replace the battery regularly.
*1 Error detection : If the voltage of the absolute battery is dropped, the error detection responding
to the voltage is held.
Voltage PIO Signals Alarm
3.1V (Reference value) Voltage drop alert signal *BALM (Note 2) OFF –
2.5V (Reference value) Alarm signal *ALM (Note 2) OFF OEE Absolute Encoder Error
Detection 2
or
OEF Absolute Encoder Error
Detection 3
(Note 2) *BALM and *ALM are the signals of active low.
After the power is supplied to the controller, they are usually on and turned OFF when an
error is detected.
Replace the battery before alarm is generated due to the lamp display by *BALM signal of
PLC.
If the alarm is generated, it will be necessary to absolute reset after the battery
replacement.