IAI America MSEP - Manual (Page 208)

Chapter 4
Absolute Reset and
Absolute Battery
200
4.2.3 Absolute Battery Voltage Drop Detection
If the voltage of the absolute battery is dropped, the error detection responding to the voltage is
held.
Voltage PIO Signals Alarm
2.5V ±8% or less Alarm signal *ALM (Note 1) OFF 0EE Absolute Encoder Error
Detection 2
or
0EF Absolute Encoder Error
Detection 3
Note 1 *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. If the alarm is generated, it will be necessary
to absolute reset after the battery replacement. (The controller checks the
battery voltage at the time the power is supplied. The controller would not
detect it even if the battery voltage is decreased to the alarm level while it is
on.)
Normal
3.6V
2.5V
Alarm
occurred
Battery voltage
*ALM OFF
Absolute reset
required
*ALM signal
ON
OFF