Case 1 – Rockwell Automation 20G PowerFlex 750-Series AC Drives User Manual
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Rockwell Automation Publication 750-RM002B-EN-P - September 2013
115
Feedback and I/O
Chapter 2
Case 1
Case 1:
This shows P77 [Anlg Out0 Data] the units are consistent with the
selection of P75 [Anlg Out0 Sel]. In this case, the analog out select is set to P3
[Mtr Vel Fdbk] and the units are in rpm. P80 [Anlg Out0 Hi], P81 [Anlg Out0
Lo], P78 [Anlg Out0 DataHi], and P79 [Anlg Out0 DataLo] are all at default.
The motor was started and ramped to 1800 rpm. Note that P82 [Anlg Out0 Val]
remained zero.
Case 2:
Here the P80 [Anlg Out0 Hi] is changed to 9 and P81 [Anlg Out0 Lo] is
changed to 1. As the motor ramps up and down, there is no change in the value or
scaling of P77 [Anlg Out0 Data]. Note that P82 [Anlg Out0 Val] is still zero.
Case 3:
Now P78 [Anlg Out0 DataHi] is changed to 1800 and P79 [Anlg Out0
DataLo] is left at zero. When started P82 [Anlg Out0 Val] starts at 1 and reaches
9 when the motor speed is at maximum.
Case 4:
In this section the P80 [Anlg Out0 Hi] and P81 [Anlg Out0 Lo] were
reversed in value. Now when the motor ramps up and down P82 [Anlg Out0 Val]
is just the opposite. It starts out at 9 and is at 1 at full speed.
P77 [Anlg Out0 Data]
P78 [Anlg Out0 DataHi]
P79 [Anlg Out0 DataLo]
P82 [Anlg Out0 Val]
P80 [Anlg Out0 Hi]
P81 [Anlg Out0 Lo]
P76 [Anlg Out0 Stpt]