Rockwell Automation 8720MC Drives Integration Manual - Manual (Page 146)

Publication 8720MC-IN002A-EN-P — December 2002
C-34 Programming Parameters
Name: +Accel_Limit_0 Data Display: Integer R/W
Parameter No.
136
File:
Servo Loop
Group:
Group 0 Description: Acceleration Limit
Parameter 136 contains the desired acceleration limit for parameter set zero in radians per sec
2
. This parameter
applies to the command reference regardless of it’s source e. g. Analog input, SCANport or HIM. Reducing the
acceleration rate will prevent shocking the mechanical system while increasing the speed.
Default:
65535 Length
2 bytes SCANport Min/Max
Min.
≥ 0
Max. ≤ 65535
SCANport Scaling Resolution
1 = 1rad/sec2 Units
rad/sec
2
Default:
65535 Length
4 bytes SERCOS/DPI Min/Max
Min.
≥ 0
Max. ≤ +2 31
- 1
SERCOS/DPI Scaling Resolution
Scaling type: parameter 160
Scaling factor: parameter 161
Scaling exponent: parameter 162 Units
parameter
160
Name: -Accel_Limit_0 Data Display: Signed Integer R/W
Parameter No.
137
File:
Servo Loop
Group:
Group 0 Description: Deceleration Limit
Parameter 137 contains the desired deceleration limit for parameter set zero in radians per sec2. This parameter
applies to the command reference regardless of it’s source e. g. Analog Input, SCANport or HIM. Reducing the
deceleration rate may be required to prevent bus over voltage when neither a regenerative converter or a brake
chopper are required. Also reducing the deceleration rate may be required to prevent overcurrent faults caused by
fast deceleration at high speeds.
Default:
-32768 Length
2 bytes SCANport Min/Max
Min.
≤ 0
Max.
≥ -32768
SCANport Scaling Resolution
1 = 1rad/sec2 Units
rad/sec
2
Default:
-32768 Length
4 bytes SERCOS/DPI Min/Max
Min.
≤ 0
Max.
≥ -2 31
SERCOS/DPI Scaling Resolution
Scaling type: parameter 160
Scaling factor: parameter 161
Scaling exponent: parameter 162 Units
parameter
160
Name: ±Accel_Limit Data Display: unsigned Decimal R/W
Parameter No.
138
File:
Control
Group:
Acceleration Description: This parameter sets the acceleration and deceleration limits for the drive. This is only in effect when
operating in velocity mode.
Default:
65535 Length
2 bytes SCANport Min/Max
Min.
≥ 0
Max.
≤ 65535
SCANport Scaling Resolution
1 = 1rad/sec2 Units
rad/sec
2
Default:
1,000,000 Length
4 bytes SERCOS/DPI Min/Max
Min.
≥ 0
Max.
≤ +2 31
- 1
SERCOS/DPI Scaling Resolution
Scaling type: parameter 160
Scaling factor: parameter 161
Scaling exponent: parameter 162 Units
parameter
160