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In order to use parameter b5-19 as the PI Setpoint, set parameter b5-18= "1: Enabled". If b5-18= "0: Disabled" the PI Setpoint
will either be:
•
Modbus Register 06H (If Register 0FH bit 1 is high)
•
The active speed command (i.e. Determined by the setting of b1-01). See Table 1 "Setpoint Options"
b5-19 PI Setpoint Value
Setting Range: (dependant on parameter b5-20)
B5-19 Setting Range Example:
b5-20 Setting
0
0 - 60.00
1
0.00 - 100.00
2
0 - 3600
4
0 - 1800
6
0 - 1200
Factory Default: 0.00
Parameter b5-19 is for a PI Setpoint value. When b5-18= "1: Enabled", the value of b5-19 will take precedent over any other PI
setpoint unless the Drive is set up for Differential Feedback, in which case, b5-18 and b5-19 have no affect on the PI
function.
Displayed units are determined by b5-31, regardless of b5-20 setting. This does not affect the value programmed into the drive.
Example : if b5-20 = 1, b5-31 = 0, then b5-19 will be displayed in "WC: Inches of Water Column The value set in b5-19 will be
in percent feedback.
b5-20 PI Setpoint Display Scaling
Setting Range:
0 to 39999
Factory Default: 1
Setting
U1-24 and U1-38 Display Increments
0
0.01 Hz
1
0.00%
2-39 (enter # of
RPM
motor poles)
40 through
Engineering Units
39999
The PI Setpoint Display Scaling value (b5-20) is a scaling factor that is applied to the monitor display for both the PI Setpoint
(U1-38) and the PI Feedback (U1-24) and (b5-19) PI Setpoint. Display text for the units is set by b5-31 PI Unit Selection.
If the monitors seem more natural in terms of percentage, set b5-20= 1. If the monitors are easier to work with when displaying
the equivalent synchronous RPM, set b5-20= [the number of motor poles].
If another engineered unit, such a fpm or cfm, is desired, set b5-20= xxxxx where
Digits 1 through 4 set the desired number to be displayed at 100% feedback.
Digit 5 determines the number of decimal places.
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b5-19 "Setting Range"
<3020>
X X X X X
Digit 5 Digit 4 Digit 3 Digit 2 Digit 1
If Digit 5 = 0
number format is XXXX
If Digit 5 = 1
number format is XXX.X
If Digit 5 = 2
number format is XX.XX
If Digit 5 = 3
number format is X.XXX
Programming 5 - 21
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