Rockwell Automation GV3000/SE AC Gen. Purpose and Vector Drive Software Start-Up and Ref. Manual - Manual (Page 212)

G-2 GV3000/SE AC Drive Software Reference, Version 6.06
G.1 Configuring the Analog Input
Parameter P.011 is used to specify the type of input and whether it is to be inverted
after it is converted by the drive. The parameter setting should coincide with the
position of jumper J4 on the Regulator board. For example, if a voltage input is
applied, J4 should be set to +/- 10 VDC and P.011 should be between 0 and 3. If a
current input is applied, J4 should be set to 0 to 20 mA and P.011 should be between
4 and 11.
If P.011 is odd, the digital value of the input is inverted resulting in a positive input
inverted to a negative reference value, and a negative input converted to a positive
reference value. Note that the Forward/Reverse Configuration parameter (P.027) is
applied after the analog input.
The 4 to 20 mA input can be configured to generate a drive fault or a drive alarm if the
input falls below 2 mA. Refer to the P.011 parameter description for more information.
G.2 Using the Analog Input as Speed or Trim Reference
When the analog input is used as speed or trim reference, the analog input value will
be interpreted internally as shown in table G.1 and described below:
• The maximum positive analog input value (+10 VDC or 20 mA) corresponds to the
value specified as the maximum speed of the drive (P.004).
• The maximum negative analog input value (-10 VDC) corresponds to -P.004
(reverse or 0, see P.027).
• The minimum analog input value (0 VDC or 0 mA; 4 mA if P.011 = 4, 5, or 8-11)
corresponds to the value specified as the minimum speed of the drive (P.003).
• When P.011 = 0 or 1, there is no hysteresis provided around zero on the input.
Therefore, if the input fluctuates around zero, the reference will toggle between
positive minimum speed (+P.003) and negative minimum speed (-P.003).
Note that the analog input is scaled based on the values entered in P.003 and P.004. If
these parameters are changed while the drive is running, and the analog input is used
as the speed or trim reference, the speed reference will change even though the input
value has not.
Table G.1 – Analog Input Conversion Scaling for Speed or Trim Reference
Analog Input
Values Corresponding Internal Value
+10 VDC (20 mA) P.004 (Maximum Speed)
0 VDC (0 mA) P.003 (Minimum Speed)
-10 VDC -P.004 (Negative Maximum Speed; reverse or 0, see P.027)