Omron NX701-1 User Manual

6 Motion Control Programming
6-18
NJ/NX-series CPU Unit Motion Control User’s Manual (W507)
6-5 Positions
This section describes the positions that are used in motion control programming.
The MC Function Modules uses the following two types of positions.
The following figure shows the relationship between the command position and the actual position for
an EtherCAT slave Servo Drive.
The command position and actual position share the following items.
* If there is any following error before the change, the following error value is maintained in the actual position.
Additional Information
• For a virtual servo axis, the command current value is converted to pulses and then that value
is converted to the unit of display. The resulting value is used as the actual current value.
• Refer to the NX-series Position Interface Units User’s Manual (Cat. No. W524) for information
on the NX-series Position Interface Units.
6-5-1 Types of Positions
Type of position Definition
Command position This is the position that the MC Function Module outputs to control an axis.
Actual position The actual position as input from the Servo Drive or encoder input.
Item Command position Actual position
Count Mode You can set Linear Mode or Rotary
Mode.
The same Count Mode is used as
for the command position.
Position increment You can set one of the following:
mm, μm, nm, inch, degree, or pulse.
The unit is the same as the unit of
the command position.
Software limits You can set the range of operation
of the software.
The range is the same as the range
for the command position.
Changing the current position You can change the actual position
to any desired position.
This value will be set to the same
position as the command position.
*
Defining home Home is either defined or
undefined.
The status of home is the same as
the command position.
Servo Drive
Feedback
counter
Command
position
counter
Electronic
gear
In-position check
Electronic
gear
MC Function Module
Motion
control
instruction
User program
M
E
Motion
control
processing
Command
position
(command units)
Actual position
(command units)
Command position
(pulses)
Actual position
(pulses)
Following
error
counter
Position loop
Velocity loop
Current loop
Remainder
Remainder
Return
Remainder
Remainder
Motion control
instruction
User program
Motion control
processing
In-position check
Electronic gear
Electronic gear
Command position
(pulses)
Actual
position
(pulses)
MC Function Module
Command position
(command units)
Actual position
(command units)

Omron NX701-1 Specifications

General

Brand	Omron
Model	NX701-1
Category	Controller
Language	English