Delta ASDA-A3 Series User Manual page 883

Absolute System
Important
A complete absolute servo system includes an ASDA-A3 servo drive, an absolute motor, and a
backup battery box. The backup battery supplies power to the system so that the encoder
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continues operating when the main power to the servo drive is off. In addition, the absolute
encoder can continuously record the motor's actual position at any time, even when the motor
shaft is rotated after the power is off. The absolute servo system must be used only with an
absolute motor. If the servo drive is set up with an incremental motor and the absolute function
is enabled (P2.069.X =1), AL069 occurs.
When using an absolute motor, make sure the motor speed is lower than 250 rpm at the
moment when power is on. When the encoder is operating with the battery, make sure
the maximum speed of the motor does not exceed 200 rpm.
To determine whether your motor is an absolute type, check the model name as shown in the
following:
ECM-A3 series servo motor
ECM-B3 series servo motor
ECMC series servo motor
Install the battery correctly on the encoder. One servo drive uses one single battery box;
two servo drives can share one dual battery box. Use Delta's encoder cable to connect to the
battery box. See the following sections for the specifications of the battery box and its
accessories.
10-2
ECMC - W
W: absolute motor
ASDA-A3