Yaskawa E7 Drive User Manual - Manual (Page 98)

Programming 5 - 24
b5-28 PI Feedback Square Root Function Activation
If b5-28= “1: Enabled”, the square root of the PI feedback is compared to the PI Setpoint in order to determine appropriate
Drive output to properly regulate the system. This is helpful in cases where the measured feedback is pressure but the PI loop
needs to regulate flow.
b5-29 PI Square Root Gain
Setting Range: 0.00 to 2.00
Factory Default: 1.00
A multiplier applied to the square root of the feedback.
b5-30 PI Output Square Root Monitor Selection
If the PI Function is regulating the flow of a closed loop system by using a pressure feedback, it may be convenient to view the
square root of the PI output using monitor U1-37.
b5-31 PI Unit Selection
Sets units for b5-19, U1-24 and U1-38.
Parameter adjusts the units seen on the monitors U1-24 and U1-38. This parameter does not adjust the actual setpoint or the
setpoints scaling.
Setting Description
0 Disabled (factory default)
1 Enabled
Setting Description
0 Disabled (factory default)
1 Enabled
Setting Description
0 WC: InchOfWater (factory default)
1 PSI: lb/SqrInch
2 GPM: Gallons/Min
3 F: DegFahrenheit
4 CFM: Cubic ft/Min
5 CMH: Cubic M/Hr
6 LPH: Liters/Hr
7 LPS: Liters/Sec
8 Bar: Bar
9 Pa: Pascals
10 C: DegCelsius
11 Mtr: Meters
TM_E7_01_07182008.book Page 24 Wednesday, July 23, 2008 2:35 PM