Diagnostics and Troubleshooting
Analog Outputs
The drive has two 10 bit Analog Outputs which may be used for diagnostics, monitoring or control purposes. These outputs are referred to as Channel 1 and Channel 2. They can be accessed from the command connector on the drive or from the diagnostics output pins located on the front of the drive.
Each Channel provides a programmable Analog Output Source. (In early releases, the
Default Analog Output Source:
•Channel 1 = Velocity Feedback
•Channel 2 = Torque Command
Output
1
2
Source
Velocity Feedback
Torque Command
Offset
0
0
Scale
600RPM/volt 30% /volt
Each channel includes a programmable Analog Output Offset and an Analog Output Scale. This feature allows you to “zoom in” to a desired range effectively increasing the resolution. The units for both of these parameters is dependent upon the Analog Output Source selection.
Analog Output Offset units:
•Velocity Feedback = RPM
•Torque Command = Percent of continuous torque
Analog Output Scale units:
•Velocity Feedback = RPM/volt
•Torque Command = Percent of continuous torque/volt
Example:
You could use the Analog Outputs to accurately measure velocity overshoot. For example, to measure a target velocity of 2000 RPM at a resolution of ±10V = ±200 RPM do the following.
1.Selected Velocity Feedback for the Analog Output Source.
2.Set the Analog Output Offset to 2000 RPM.
3.Set the Analog Output Scale to 20 RPM/VOLT.
This will provide an active range from
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