Rockwell Automation 8720MC Drives Integration Manual - Manual (Page 129)

Publication 8720MC-IN002A-EN-P — December 2002
Programming Parameters C-17
Name: Vel_Scale_Factor Data Display: Integer R/W
Parameter No.
45
File:
Control
Group:
Velocity Description: Velocity data scaling factor. This parameter defines the scaling factor for all velocity data in a
SERCOS configured drive.
This parameter is available with the 8720MC SERCOS interface.
Default:
preferred Length
2 bytes SERCOS/DPI Min/Max
Min.
≥ 1
Max.
≤ +2 15
- 1
SERCOS/DPI Scaling Resolution
Structure of the scaling factor:
Bits 15-0: factor Units
scaler
Name: Vel_Scale_Expon Data Display: Signed Integer R/W
Parameter No.
46
File:
Control
Group:
Velocity Description: Velocity data scaling exponent. This parameter defines the scaling exponent for all velocity data in a
SERCOS configured drive.
Default:
preferred Length
2 bytes SERCOS Min/Max
Min.
≥ -2 15
Max. ≤ +2 15
- 1
SERCOS Scaling Resolution
Structure of the scaling exponent:
Bit 15: Sign of the exponent
0 – positive
1 – negative
Bits 14-0: Exponent Units
scaler
Name: Position_Command Data Display: Decimal R/W
Parameter No.
47
File:
Control
Group:
Position Description: Position command value. In the SERCOS configurations, during the positioning mode of operation, the
position command values are transferred from the motion control unit to the drive. In the analog versions the only
commanded position is the orient position.
See parameter 153,”Orient angle”. In the SCANport configurations the position is available from 1203 Gateway
Communication Modules via parameter 258 “Target Position”
Default:
N/A Length
2 bytes SCANport Min/Max
Min.
≥ -32768
Max. ≤ +32767
SCANport Scaling Resolution
360/parameter 79 = rotary position increment in deg.
parameter 79 = rotary position increment in counts/
rev. Units
parameter
79
Default:
N/A 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
parameter
76