bsolute
sensor
battery
failure
Possible Multiple-rotation data is indefinite due to
battery back-up failure of absolute sensor.
Alarm code 0,1 indicates: when Func2/ bit7,6 =”0,0”, “0”= output open and “1”= output short.
Operating state when alarm occurred
POSSIBLE CAUSES
OPERATING STATE
1 2 3 4
When control power supply is turned ON
○ ○ ○ △
During operation
○ △
Corrective Measures
CAUSE CORRECTIVE MEASURES
1 Weak battery (Lithium battery) Replace the (lithium) battery
→Encoder clear over 4 seconds
2 • No current flow over 20 hrs while battery is
not connected to sensor.
• Battery wiring is faulty
Check and correct wiring, or connect battery.
→Encoder clear over 4 seconds
3 Faulty servo motor sensor Replace servomotor
4 Faulty amplifier control board Replace amplifier
At the initial setting of motor with absolute sensor (initial current flow), battery failure alarm
will be displayed even in case of not week battery. Input encoder clear over 4 seconds to
release the failure.
In case of wiring-saved absolute sensor (ABS-E.S1) with application not using multiple
rotational data without connecting lithium battery, set bit5 of Func6 to “1” and turn on the
control power again. Then alarm “U” (battery error) will not be detected in turning on the
control power.
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