4.2 Setup Procedure
4.2.1 Setting the Rotational Coordinate System
4-3
4
Rotational Coor
dinate
S
y
s
tem
4.2
Setup Procedure
The following table gives the procedure for making settings for the rotational coordinate sys-
tem.
4.2.1
Setting the Rotational Coordinate System
Use the following parameters to set the first rotational coordinate and last rotational coordinate.
Note: Turn the power supply OFF and ON again, or send the Setup Device command (CONFIG) from the host con-
troller to enable changes to these parameters.
Step
Description
1
Set the first rotational coordinate (Pn87C) and last rotational coordinate (Pn87A).
2
Set the multiturn limit to match the machine rotational coordinate system. (This step is necessary
only for an absolute encoder.)
3
Turn the power supply OFF and ON again, or send the Setup Device command (CONFIG: 04h)
from the host controller.
4
Set the origin offset for the absolute encoder. (This step is necessary only for an absolute
encoder.)
5
Set the movement method for the rotational coordinates (Pn87E = n.
X).
6
Perform the following operation for your encoder.
Absolute Encoder
Send the Turn Sensor ON command (SENS_ON: 23h) from the host controller.
Incremental Encoder
•
Send the Zero Point Return command (ZRET: 3Ah) from the host controller.
•
Use the Set Coordinates command (POS_SET: 20h) from the host controller to set a reference
point (REFE = 1).
7
Start operation.
Pn87C
First Rotational Coordinate
Setting Range
Setting Unit
Default Setting
When Enabled
Classification
-536,870,912 to 0
1 reference unit
0
After restart
Setup
Pn87A
Last Rotational Coordinate
Setting Range
Setting Unit
Default Setting
When Enabled
Classification
0 to +536,870,911
1 reference unit
0
After restart
Setup
•
If Pn87A and Pn87C are set to 0, operation will be performed with linear coordinates
(-2,147,483,648 to 2,147,483,647) in the same way as for a standard
Σ
-7 SERVOPACK.
•
In Reverse Rotation Mode (Pn000 = n.
1), the motor will operate in the reverse direction,
but Pn87A and Pn87C are set to the same direction as the reference direction.
Important