AMD2000 Series - Servo Drive - User Manual
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DS619-0-00-0019 - Rev 0
ANCA Motion
6. The drive then sets its reported position at this point as relative to machine zero by the amount set
in either of IDN’s S-0-0052/52 and S-0-0054/54. Under some conditions it is possible for DCH to
then order the drive to execute a further move to the reference offset position before considering
itself to be at home, however the AMD2000 does to currently implement this final offset
r
epositioning that would usually result in a move as specified by IDN’s S-0-0150/150 or S-0-
0151/151.
7. At the completion of homing, the status actual position value (S-0-0403/403) is set to flag the
successful completion of the DCH function.
8. The IDN S-0-0148/148 must now be reset to 0 by an external entity, or the drive will remain in the
DCH state of operation, and will not subsequently move or respond until this action is completed.
For more details regarding each parameter, refer to the “Digital Servo Drive SoE Parameter Reference”
(dd_reference_SoE_parameter.pdf).
The DCH function can be performed at almost any time by activating the DCH function again (via procedure
command S-0-0148/148 being set to 1). Therefore care must be exercised that DCH does not become activated
while the drive and associated axis are executing other tasks.
Warning:
Care must be exercised so that the DCH function is NOT activated while the axis is already in
motion, or committed to performing other tasks, since unexpected behaviour may result.
Control Unit Controlled Homing
Control Unit Controlled Homing (CUCH) requires the Homing Enable IDN S-0-0407/407 to be set by an external
control unit (e.g. a CNC). The drive also sets up the calculated offset at the end of a successful homing
execution so that future position commands are referenced to the machine zero. The home switch may be
connected to either the control unit or the drive via the appropriately configured digital inputs.
There are three configurable use cases that the control unit may select for implementation of CUCH:
1. Control unit detection of homing, and calculation of homing data,
2. Drive amplifier detection of homing, but Control unit calculations of homing data, or
3. Drive amplifier detection of homing, and calculation of homing data.
The following IDN’s are relevant to CUCH configuration and operation:
IDN
Label
S-0-0052 / 52
Reference Distance 1
S-0-0054 / 54
Reference Distance 2
S-0-0146 / 146
Control Unit-Controlled Homing Procedure Command
S-0-0147 / 147
Homing Parameter
S-0-0150 / 150
Reference Offset 1
S-0-0151 / 151
Reference Offset 2
S-0-0171 / 171
Calculate Displacement Procedure Command
S-0-0172 / 172
Set Reference Point Procedure Command
S-0-0175 / 175
Displacement Parameter 1
S-0-0403 / 403
Position Feedback Value Status
P-0-0422 / 33190
Use a Digital Input in Place of an Index Pulse for Homing
Case 1: the home switch is connected to the control unit and the control unit makes calculations.