Chapter 4 Operation
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4.5.2 Setting Input Signals
（
1
1
1
1
）
Speed
Speed
Speed
Speed Reference
Reference
Reference
Reference Input
Input
Input
Input
Input the speed reference to the servodrive using the analog voltage reference to control the
servomotor speed in proportion to the input voltage.
（
2
2
2
2
）
Proportional
Proportional
Proportional
Proportional Control
Control
Control
Control Reference
Reference
Reference
Reference (/P-CON)
(/P-CON)
(/P-CON)
(/P-CON)
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
5.2
5.2
5.2 Operation
Operation
Operation
Operation in
in
in
in Utility
Utility
Utility
Utility Function
Function
Function
Function Mode
Mode
Mode
Mode
....
The servodrive automatically adjusts the offset when the host controller or external circuit has the offset
in the reference voltage.
Type
Type
Type
Type
Signal
Signal
Signal
Signal Name
Name
Name
Name
Connector
Connector
Connector
Connector Pin
Pin
Pin
Pin Number
Number
Number
Number
Name
Name
Name
Name
Input
V-Ref+
CN1-1
Speed Reference Input
V-Ref-
CN1-2
Speed Reference Input
AGND
CN1-3
Signal Ground for 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 speed reference input gain.Refer to
4.5.1
4.5.1
4.5.1
4.5.1 Setting
Setting
Setting
Setting Parameters
Parameters
Parameters
Parameters
.
■ Input Specifications
· Maximum allowable input voltage:DC±12V
Tpye
Tpye
Tpye
Tpye
Signal
Signal
Signal
Signal
Connector
Connector
Connector
Connector
Pin
Pin
Pin
Pin Number
Number
Number
Number
Setting
Setting
Setting
Setting
Meaning
Meaning
Meaning
Meaning
Input
/P-CON
CN1-15
ON(low level)
Operates the servodrive with
proportional control
OFF(high level)
Operates the servodrive 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
3.2.2
3.2.2
3.2.2 I/O
I/O
I/O
I/O Signal
Signal
Signal
Signal Names
Names
Names
Names and
and
and
and Functions
Functions
Functions
Functions
....
