Allen-Bradley Ultra1500 2092-DA1 - Analog Current Mode

Publication 2092-UM001D-EN-P — July 2005
5-44 Ultra1500 Application Examples
Analog Current Mode
Figure 5.25 shows the block diagram for the analog current mode of the
Ultra1500:
Figure 5.25
Analog Current Mode Block Diagram
The current command limit is set to the minimum of the following:
• Positive / Negative Internal Current Limit,
• Positive / Negative External Current Limit,
• Stopping Current (if active), and
• Drive Peak / Motor Peak Current Rating.
Block/Switch definitions shown in Figure 5.25 refer to the Ultraware parameter names where applicable.
+
+
Analog Current
Command (Volts)
K
c
Analog Current
Command
Offset (V olts)
2
Block/Switch Definitions:
1 Mode Configuration : Analog : Current Command Offset
2 Mode Configuration : Analog : Current Scale
3 Main Drive Window : Command Polarity
4 Main Drive Window : Current Limits; Main Drive Window : Stopping Functions : Maximum Stopping Current
5 Tuning Window : Main Current Regulator Gains : Low Pass Filter Bandwidth
6 Tuning Window : Main Current Regulator Gains : Resonant Frequency Suppression
3
1
-1
4
Current
Command to
Current
Reg ulator
5 6
Current
Cmd
Limit
Current
Cmd
Low Pass
Filter
Current
Cmd
Notch Filter
1