Specifications

3.WIRING
3– 22
b. Connection diagram
Generally connect as shown in Fig. 3-5. When a precision speed command is required,
connect as shown in Fig. 3-6. In this case, the temperature fluctuation of the command
voltage is ±0.002%/°C. Note that as the maximum value of the command voltage is approx.
+6V, adjust the maximum value with parameter No. 25.
(2) Speed control mode1
1) Speed setting
a. Speed command and speed
The servo motor is run at the speeds set in parameters No. 8 to 10 (internal speed com-
mands 1 to 3) or at the speed set in the applied voltage of the analog speed command
(VC). A relationship between the analog speed command (VC) applied voltage and the
servo motor speed is shown in Fig. 3-4. The rotation directions determined by the forward
rotation start signal (ST1) and reverse rotation start signal (ST2) are indicated in Table 3-
2.
Fig. 3-4 VC Applied Voltage vs. Speed (ST1=ON)
Across
ST1-SG
Table 3-2 ST1/ST2 and Rotation Directions
Open
0 +10
-10
[r/min]
Rated speed
CCW direction
VC applied voltage [V]
Rated speed
CW direction
Across
ST2-SG
Open
Open
Short
Short
Analog speed command (VC)
Internal speed
commands 1 to 3
Rotation Direction
0V+ polarity - polarity
Stop
(Servo lock)
CCW
CW
Stop
(Servo lock)
Stop
(Servo lock)
Stop
(No servo lock)
Stop
(Servo lock)
Stop
(Servo lock)
CW
CCW
Stop
(Servo lock)
Stop
(Servo lock)
CCW
CW
Stop
(Servo lock)
Forward
rotation
CCW
Reverse
rotation CW
[r/min]
Speed
Short
Open
Short
SG
P15R
VC
LG
SD
Fig. 3-5 Connection Example 1
2kΩ
2kΩ
Japan Resistor
RRS10 or equivalent
Servo amplifier
SP1
SP2
NEC
1SZ52 or
equivalent
2kΩ
15V
1/2W
860kΩ
Servo amplifier
VC
LG
SD
Japan Resistor
RRS10 or equivalent
Fig. 3-6 Connection Example 2