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DYN2MS-02F-0116A17
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Electronic Gearing (
GEAR_NUM
Parameter )
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Servo In Position Output Specifications (
ONPOS )
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Servo Position Error Accumulation
4.1 Position Servo Mode
On position range is a value used for determining whether the motor have reached the commanded posi
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tion or not. That on position range is selectable according to customer’s requirement. Suppose the Pset is
the commanded position, and Pmotor is the real motor position, if
|Pset - Pmotor|<=OnRange
it is said motor is ON the commanded positi
on, otherwise not. That OnRange is set from 1~127. The real
position on range is: OnRange * 360(deg)/16,384. Set mouse curser into the OnPosition edit box, input
the desired on position value, then click the save button, On position value will be sent to the Drive with
all other parameters. The ONPOS output (JP3-9) will be HIGH if motor in position and LOW if motor off
position.
Gear number is set from 500 to 16,384, default value is 4,096. Gear number provides an electrical gear
ratio: 4096 / Gear_Num, from 0.25 ~ 8.192. For example, if Gear number = 4,096, the 16,384 input counts
from pulse will turn motor exactly one revolution. If Gear number = 500, 2,000 pulses will turn motor one
revolution.
For analog input in position servo mode, the analog input is from 0~10VDC range, by using the Gear Num
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ber, 0~10VDC analog input can turn motor from 0~90*4,096/Gear number (degrees). The gear number
has the same effect on the serial Point to Point movement or RS232 command input mode. Gear number
parameter is only effective for position servo mode.
The servo drive’s internal position error decides the status of the On Position signal and the Lost Phase
servo drive alarm.
The On Position signal is triggered (LOW) when the servo position error is within the OnPosRange set in
the DMMDRV program. The Lost Phase alarm is triggered when the servo motor is physically 90° or more
out of position for ~2 seconds.
The servo position error is cleared when the drive is disabled using the ENA input and does not accumu
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late when the drive is disabled.