Omron NJ501-1300, User Manual

Page: 106 / 432

5 Motion Control Parameters
5-8
NJ-series CPU Unit Motion Control User’s Manual (W507)
• The value set on the Servo Drive’s node address switches is loaded only once when the Servo
Drive’s control power is turned ON. Such changes are enabled only after the power supply is
turned ON again. Do not change the setting on the node address switches after the power
supply has been turned ON.
• An error occurs if the same node address is used more than once.
• The value set from the Sysmac Studio will be used for all non-OMRON slaves, regardless of
any setting at the slave.
These parameters set position units.
*1 This is the numerator of the electronic gear ratio (unit conversion formula).
*2 For example, if the encoder resolution is 10,000 pulses/rotation, set 10,000.
*3 This is the denominator of the electronic gear ratio (unit conversion formula).
Positions are generally given in pulses between the MC Function Module and Servo Drives or
encoder input terminals. Use a display unit of millimeters or degrees for motion control instructions
so that you can easily understand the operation.
You can use the Unit of Display parameter and electronic gear (unit conversion formula) settings to
change from a pulse unit to millimeters or degrees.
You can use the Unit of Display parameter to set the unit to display on the Sysmac Studio. The display
shows the position's display unit. The following table describes the units you can set.
5-2-3 Unit Conversion Settings
Parameter name Function Setting range Default
Unit of Display Set the unit for command positions.
pulse
mm
µ
m
nm
degree
inch
0 to 5 0
Command Pulse
Count Per Motor
Rotation
*1
Set the number of pulses per motor rotation
for command positions according to the
encoder resolution.
*2
The command value is
converted to a number of pulses based on
the electronic gear ratio.
1 to 4,294,967,295 10,000
Work Travel Dis-
tance Per Motor
Rotation
*3
Set the workpiece travel distance per motor
rotation for command positions. 0.000000001 to
4,294,967,295 10,000
Unit of Display
Unit Description
pulse Use this unit to express values in pulses.
mm Use this unit for comparatively long-distance direct operation.
µ
m Use this unit for precise direct operation.
User
program
Motion
control
instructions
MC
Function
Module
Servo
Drive
Encoder
Input
Terminal
Position
increment
Pulses
Pulses