Position Correction Table Block Diagram - YASKAWA Sigma-7 Series Product Manual

This function is enabled after either of the following operations is performed during position
control.
• When using an absolute encoder
The SENS_ON (Turn Sensor ON: 23h) command is sent from the host controller.
• When using an incremental encoder
• The ZRET (Zero Point Return: 3Ah) command is sent from the host controller.
• The reference point is set (REFE = 1) using the POS_SET (Set Coordinate System: 20h)
command from the host controller.
• The PSET and NEAR signals are output based on the corrected position.
Information
• The software limit function uses the uncorrected position.
• This product assumes a system that issues commands for the same target position to the
If there is a deviation in the position of the origin, a deviation will occur in the values set in the
Position Correction Table, and the function may not work effectively. Configure the system so that
the position of the origin does not deviate.
Important
3.1.1

Position Correction Table Block Diagram

With each control cycle in the Servo (less than or equal to the communications cycle), the posi-
tion of IPOS (Internal Reference Position) is corrected by the Position Correction Table.
master axis and slave axis.
To use this product for any other application, contact your Yaskawa representative.
Ho t controller
INTERPOLATE
TPO
/PO ING
IPO
APO
INTERPOLATE
/PO ING
TPO
Δd
IPO
APO
3.1.1 Position Correction Table Block Diagram
ERVOPACK (ma ter)
IPO
ERVOPACK ( lave)
IPO '
IPO
+
+
Po ition
Correction
Table
Δd
Po ition
+
Correction
+
Table
3.1 Outline
ervo
ervo-
control
motor
ervo
ervo-
control motor
3
3-3