YASKAWA SGM-A3 User Manual page 78

→ Input V-REF 1CN-5
→ Input SG-V 1CN-6
Use these signals when speed control is selected
(memory switch Cn-02 bit B = 0).
For ordinary speed control, always wire the V-
REF and SG-V terminals.
Motor speed is controlled in proportion to the input
voltage between V-REF and SG-V.
• Standard Setting:
Cn-03 = 500: This setting means that 6 V is equivalent to rated speed (3,000 r/min)
Examples:
+6 V input → 3000 r/min in forward direction
+1 V input → 500 r/min in forward direction
−3 V input → 1500 r/min in reverse direction
User constant Cn-03 can be used to change the voltage input range.
• Example of Input Circuit
(See the figure on the right)
For noise control, always use twisted-pair
cables.
Recommended Variable Resistor for Speed Setting:
Type 25HP-10B manufactured by Sakae Tsushin Kogyo Co., Ltd.
When position control is performed by a host con-
troller such as a programmable controller.
Connect V-REF and SG-V to speed reference
output terminals on the host controller. In this
case, adjust Cn-03 according to output voltage
specifications.
Output → +15V 1CN-23
Output → -15V 1CN-24
Power output for speed/torque control.
Max. output current is 30mADC.
3.2 Setting User Constants According to Host Controller
Speed Reference Input
Signal Ground for Speed
Reference Input
Reference
speed
Standard
setting
Host controller
Speed
reference
output
terminals
Feedback
pulse input
terminals
↕P: Represents twisted-pair cables
+15V power supply for
speed/torque control
-15V power supply for
speed/torque control
For Speed/Torque
Control Only
For Speed/Torque
Control Only
4500
3000
1500
Input voltage (V)
-1500
-3000
-4500
Set the slope in
Cn-03 (VREFGN).
Servopack
Servopack
1CN-5
1CN-6
1CN-33
1CN-34
1CN-35
1CN-36
For Speed/Torque
Control Only
For Speed/Torque
Control Only
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