Rockwell Automation 8720MC Drives Integration Manual - Manual (Page 158)

Publication 8720MC-IN002A-EN-P — December 2002
C-46 Programming Parameters
Name: Mtr_Fdbk_Config Data Display: Bit Pattern R/W
Parameter No.
277
File:
Motor/Drive/
Fdbk
Group:
Motor Feedback Description: Position feedback 1 type. The position feedback 1 type parameter refers only to a motor feedback
device. This parameter is programmed to define the corresponding conditions which apply to reading the motor
feedback device.
Enumerated Bit Pattern:
Structure of Position Feedback 1 Type:
Bit 0: Feedback type
0 – rotational feedback (parameter 116)
1 – linear feedback (not defined)
Bit 1: Distance coded feedback
0 – no distance coded reference marks
1 – distance coded reference marks (parameters 165, 166)
Bit 2: Feedback resolution (parameter 118 - linear) or (parameter 116 - rotary)
0 – resolution = metric or 0 - resolution = degree
1 – resolution = inches or 1 - resolution = (reserved)
Bit 3: Direction polarity
0 – not inverted
1 – inverted
Bit 4: marker pulse quantity
0 – only one reference marker pulse
1 – multiple cyclic reference marker pulses
Bit 5: Structure of distance coded feedback
0 – counting positive with positive direction
1 – counting negative with positive direction
Bit 6: Type of measuring system
0 - relative (incremental) measuring system
1 - absolute measuring system
Bit 7: Usage
0 - absolute measurements with an absolute measuring system
1 - relative (incremental) measurements with an absolute measuring system
Bits 15-8 (reserved)
Default:
xxxx0000 Length
2 bytes Minimum/Maximum
N/A Scaling Resolution
N/A Units
N/A
Name: Vel_Fdfwd_Gain_0 Data Display: Decimal R/W
Parameter No.
296
File:
Servo Loop
Group:
Group 0 Description: Velocity feed forward gain. This parameter is one of the 8 sets of servo parameters. The velocity
feed forward parameter is effective in the operation mode “Position control without following error (lag-less)”,
and serves to reduce the velocity-dependent following error.
Default:
0.00 Length
2 bytes Minimum/Maximum
Minimum Input:
≥ 0
Maximum Input:
≤100.00
Scaling Resolution
1 = .01% Units
%