Estun ProNet-15D - Setting Input Signals; Adjusting Reference Offset

ProNet Plus Series AC Servo User's Manual
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4.5.2 Setting Input Signals
(1) Speed Reference Input
Input the speed reference to the servo drive using the analog voltage reference to control the servomotor speed in
proportion to the input voltage.
Type
Signal Name
Connector Pin Number
Name
Input
V-Ref+
CN1-1
Speed Reference Input
V-Ref-
CN1-2
Speed Reference Input
The above inputs are used for speed control(analog voltage reference).(Pn005.1=0, 4, 7, 9, A)Pn300 is used to set the
analog speed reference input gain.Refer to 4.5.1 Setting Parameters.
(2) Proportional Control Reference (/P-CON)
Tpye
Signal
Connector Pin
Number
Setting
Meaning
Input
/P-CON
CN1-15
ON(low level)
Operates the servo drive with proportional
control
OFF(high level)
Operates the servo drive with proportional
integral control.
/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 0V, 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 3.2.2 I/O Signal
Names and Functions.
4.5.3 Adjusting Reference Offset
When using the speed control, the servomotor may rotate slowly even if 0V is specified as the analog voltage reference.
This happens if the host controller or external circuit has a slight offset (in the unit of mV) in the reference voltage.
Adjustments can be done manually or automatically by using the panel operator. Refer to 5.2 Operation in Utility
Function Mode.
The servo drive automatically adjusts the offset when the host controller or external circuit has the offset in the reference
voltage.
Reference Voltage
Offset
Speed Reference
Reference Voltage
Speed Reference
Offset automatically
adjusted in servodrive.
Automatic offset adjustment
After completion of the automatic adjustment, the amount of offset is stored in the servo drive. The amount of offset can be
checked in the speed reference offset manual adjustment mode (Fn004). Refer to 4.5.3 (2) Manual Adjustment of the