Rockwell Automation 8720MC Drives Integration Manual - Manual (Page 156)

Publication 8720MC-IN002A-EN-P — December 2002
C-44 Programming Parameters
Name: Actual_Param_Set Data Display: Bit Pattern R
Parameter No.
254
File:
Procedure
Group:
Parameter
Switch Description: Actual parameter set. This parameter stores the current active parameter set in the drive. In the
SERCOS configuration if a new parameter set is to be activated, it must first be preselected using parameter set
preselection (parameter 217). Parameter set 0 must be active in every drive before and during initialization. In the
analog version the actual parameter set can be linked to the SCANport output word.
Structure of the actual parameter set:
Bit 2 – 0:
0 0 0 – parameter set 0 active
0 0 1 – parameter set 1 active
0 1 0 – parameter set 2 active
0 1 1 – parameter set 3 active
1 0 0 – parameter set 4 active
1 0 1 – parameter set 5 active
1 1 0 – parameter set 6 active
1 1 1 – parameter set 7 active
(all other bits are reserved)
Default:
000 Length
2 bytes Minimum/Maximum
Min.
≥ 0
Max. ≤ 7 binary
Scaling Resolution
N/A Units
N/A
Name: Target_Position Data Display: Decimal R/W
Parameter No.
258
File:
Control
Group:
Position Description: Target Position - The target position may be provided by the DPI master via SCANport “Data IN A2”
or SERCOS. For example with the DPI configuration selected in parameter 501 and the resolution set to 3000 units
in Parameter 79 and a modulo axis of 30,000 units as set by parameter 103 a target move of 15,000 units would
take 5 motor revolutions CW at a speed determined by parameter 259 velocity and an acceleration and
deceleration determined by parameter 260, assuming the position move started from 0. The primary operating
mode, parameter 32, must be set to position control using motor feedback.
Default:
0 Length
2 bytes SCANport Min/Max
Min.
≥ -32768
Max.
≤ +32767
SCANport Scaling Resolution
Resolution units as determined by parameter 79 Units
parameter
79
counts/rev
SERCOS
Default:
0 Length
4 bytes SERCOS/DPI Min/Max
Min. ≥ -2 31
Max.
≤ +2 31
- 1
SERCOS/DPI Scaling Resolution
Scaling type parameter 76
Scaling factor parameter 77
Scaling exponent parameter 78
Rotational Position Resolution parameter 79 Units
parameters
76, 77, 78