Shihlin electric SDP Series, Manual

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13.Absolute servo system
Absolute servo system includes servo drive, absolute servo motor and absolute encoder cable
(including battery box). The absolute position detection system does not store the data in the
PLC controller, it detects the absolute position of the machine and store the data by battery
power. Therefore, as long as the origin is set during installation, operation can be easily
resumed even if power outage or breakdown.
If the drive has enabled the relevant parameters of the absolute system, an absolute servo
motor must be used. If using the incremental servo motor, an alarm AL.24 will occur.
The absolute motor model description is as follows:
SME-□○○○ΔΔM□□□
M: Absolute servo motor
Note
When [Absolute position lost] or [Absolute position overflows] occurs, the
origin setting needs to be performed again.
Please put the battery in the battery box before using it to prevent unexpected
factors such as battery is short-circuited.
When using an absolute servo motor, please make sure that the motor speed
is lower than 50 rpm at the moment of the power is applied.
After the drive is powered off and in battery mode, the speed should not exceed
50 rpm in battery mode.
Focus The absolute position will vanish when the battery is removed, in this case, you
must set the origin before running
Restricted items:
Some operation conditions described below are not suitable to perform the absolute system.
(1) Speed control mode and torque control mode.
(2) Switching control mode.
(3) Rotating axis, infinite operation cycle positioning.