Setting Input Signals - YASKAWA SGM H Series User Manual

8.5.2 Setting Input Signals

(1) Speed Reference Input
Input the speed reference to the SERVOPACK using the analog voltage reference to control the servomotor speed
in proportion to the input voltage.
Type Signal Connector Pin
Name
Input V-REF CN1-5
SG CN1-6
The above inputs are used for speed control (analog voltage reference). (Pn000.1 = 0, 4, 7, 9, or A)
Pn300 is used to set the speed reference input gain. Refer to 8.5.1 Setting Parameters.
Input Specifications
• Input range: ±2 VDC to ±10 VDC/rated speed
• Maximum allowable input voltage: ±12 VDC
Rated motor speed
Factory setting
-12 -8 -4
Input Circuit Example
• Always use twisted-pair wire to control noise.
• Recommended variable resistor: Model 25HP-
10B manufactured by Sakae Tsushin Kogyo Co.,
Ltd.
1.8 kΩ 1/2 W min.
+12 V
2 kΩ
(2) Proportional Control Reference (/P-CON)
Type Signal
Name
Input /P-CON
/P-CON signal selects either the PI (proportional integral) or P (proportional) Speed Control Mode.
Switching to P control reduces servomotor rotation and minute vibrations due to speed reference input drift.
Input reference: At 0 V, the servomotor rotation due to drift will be reduced, but servomotor rigidity (holding force) drops
when the servomotor is stopped.
Note: A parameter can be used to reallocate the input connector number for the /P-CON signal. Refer to 7.3.2 Input Circuit
Signal Allocation.
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Number
Speed Reference Input
Signal Ground for Speed Reference Input
4 8 12
Input voltage (V)
Rated motor speed
The slope is set in Pn300.
SERVOPACK
CN1
V-REF
5
SG
6
Connector
Pin Number
CN1-41 ON (low level)
OFF (high level) Operates the SERVOPACK with proportional integral
8.5 Operating Using Speed Control with Analog Reference
Name
• Setting Example
Pn300 = 600: Rated speed at ±6 V
Actual examples are shown below.
Speed Reference
Rotation
Input
Direction
+6 V Forward
+1 V Forward
-3 V Reverse
Parameter Pn300 can be used to change the voltage input range.
Connect V-REF and SG to the speed reference output terminals on
the host controller when using a host controller, such as a program-
mable controller, for position control.
Host controller
Speed reference
output terminals
Feedback
pulse input
terminals
: represents twisted-pair wires.
Setting
Operates the SERVOPACK with proportional control.
control.
SGMAH
Motor Speed
Servomotor
Rated motor speed 3000 min
(1/6) rated motor speed 500 min
1500 min
(1/2) rated motor speed
SERVOPACK
CN1
V-REF 5
6
SG
PAO 33
/PAO 34
PBO 35
36
/PBO
Description
8-39
-1
-1
-1
8