Rockwell Automation 8720MC Drives Integration Manual - Manual (Page 171)

Publication 8720MC-IN002A-EN-P — December 2002
Programming Parameters C-59
Name: Homing_Strategy Data Type: ASCII Representation of Enumeration R/W
Parameter No.
581
File:
Procedure
Group:
Homing Description: When the 8720MC is configured for power servo and single-turn absolute or incremental feedback is
selected homing is required. Parameter 582 determines what homing strategy will be used. The possible choices
are:
(00) next marker - Proceed to the next marker after the home limit switch is detected
(01) previous marker - Stop and return to the last marker after the home limit switch is detected.
This parameter is not available for the 8720MC analog version.
Default:
00 Length
2 bytes Minimum/Maximum
N/A Scaling Resolution
N/A Units
N/A
Name: Auto_Home Data Display: ASCII Representation of Enumeration R/W
Parameter No.
582
File:
Procedure
Group:
Orient Description: When the 8720MC is configured for spindle operation, typically it is required to orient the spindle to
a specific tool change location. Parameter 582 determines what orient strategy will be used. The possible choices
are:
00 = Disabled
01 = “Index” - Orient to the motor encoder marker or absolute zero, if single turn
absolute feedback is used. Parameter 154 is used to determine if the motor encoder or the spindle
encoder is the assigned feedback orient device.
02 = “Reg 0 Rise” - Orient to a spindle mounted registration sensor using the rising edge of the
+24V dc registration input.
03 = “Reg 0 Fall” - Orient to a spindle mounted registration sensor using the falling edge of the
+24V dc registration input.
04 = “Reg 1 Rise” - Orient to a spindle mounted registration sensor using the rising edge of the
+5V dc registration input.
05 = “Reg 1 Fall” - Orient to a spindle mounted registration sensor using the falling edge of the
+5V dc registration input.
In most applications it is required to orient to the 8720SM motor encoder marker. In this case “Index” must
be selected.
Default:
00 Length
2 bytes Minimum/Maximum
N/A Scaling Resolution
N/A Units
N/A
Name: Orient_Complete Data Type: Bit Flag R, Link
Parameter No.
583
File:
I/O Interface
Group:
Event Links Description: With the 8720MC drive analog configuration a drive orient can be initiated via Digital Input 2.
+24vdc on Digital Input 2 causes parameter 152 “Spin_Orient_Req” to become true. Parameter 583 can be
linked to a digital output by entering 583 into one of the digital output words. In so doing when the spindle orient
procedure is complete the digital output will become true. Accordingly in the analog spindle configuration a
spindle orient can be requested and acknowledged to be complete via the digital I/O. In the SERCOS spindle
configuration the orient is handled as a drive orient procedure initiated by the master via the SERCOS link.
Default:
0 Length
2 bytes Minimum/Maximum
Min.
= 0.0
Max. = 1.0
Scaling Resolution
1.0 Units
N/A