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DMM Technology Corp.
DYN4 AC Servo Drive Instruction Manual
REV. ZM7-A10A
CT1
4.6
Servo Drive Monitor Outputs
█
Current Monitor (JP4-21)
█
Absolute Position Monitor (JP4-22)
The current monitor outputs an analog signal relative to the real-time current output from the servo drive
to the servo motor.
The current can be monitored relative to both positive (CCW from motor shaft) and
negative (CW from motor shaft) directions.
The analog output has a domain of [ 0V : 3.3V ] relative to [-30A : 30A] current output.
Servo Drive Current
Output
[ Ic ]
JP4-21
Analog Output
30A
3.3V
0A
1.65V
-30A
0V
The absolute position monitor outputs an analog signal relative to the real-time single turn absolute posi-
tion of the servo motor. The signal can be used to track servo motor position or can be used to calculate
servo motor speed according to the signal period. Can also be used to detect servo motor zero speed.
The analog output has a domain of [ 0V : 3.3V ]. Forward direction rotates the servo motor CW as viewed
from the shaft. Each servo motor rotation will output 32 cycles.
Servo Motor
Absolute Position
JP4-22
Analog Output
65,536/32
3.3V
4,096/32
0.21V
0
0V
1.65V
0V
3.3V
65,536
/32
JP4-22
Absolute Position
32,768
/32
1.65V
0V
3.3V
JP4-22
Absolute Position
Forward
Rotation
CW
Reverse
Rotation
CCW
t
Time per motor rotation [s] = 32*t
Servo motor rotation speed [rpm] = 1,920/t
3.3V
0
1.65V
Servo Drive Output Current [A]
30A
0V
JP4-21
-30A
65,536
/32
32,768
/32
65,536
/32
32,768
/32
65,536
/32
32,768
/32
