Rockwell Automation 23P PowerFlex DC Stand Alone Regulator and Gate Amplifier - Manual (Page 34)

34 Rockwell Automation Publication 23P-UM001D-EN-P - July 2012
Chapter 2 Stand Alone Regulator Installation, Wiring and Configuration
Binary Gain Calculation and Checking Gain Error
Binary_Sw_Setting = 23.634
Value to use - 24, Binary = 11000
For DIP switch SW3 and SW4 layout, refer to Table 14 - Binary Gain Amp DIP
Switch to Bit Layout on page 39 .
Resistor values are in K Ohms
MSB LSB
Bit Value B11: = 0 B10: = 0 B9: = 0 B8: = 0 B7: = 0 B6: = 0 B5: = 0 B4: = 1 B3: = 1 B2: = 0 B1: = 0 B0: = 0
DIP Switch
Setting
SW3-1
= Off SW3-2
= Off SW3-3
= Off SW3-4
= Off SW4-1
= Off SW4-2
= Off SW4-3
= Off SW4-4
= On SW4-5
= On SW4-6
= Off SW4-7
= Off SW4-8
= Off
R_fdbk: =
1
B11 / 0.50 + B10 / 1 + 9 / 2 + B8 / 4 + B7 / 8 + B6 / 16 + B5 / 32 + B4 / 64 + B3 / 128 + B2 / 256 + B1 / 512 + B0 / 1024
Value/Calculation Units Description
R_fdbk = 42.667
R_input = 20 Fixed input resistor
Gain_Binary_OA: = R_fdbk / R_input
Gain_Binary_OA = 2.133 versus Gain_Required = 2.166 Comparing the “Binary Gain
Amp” to the “Calculated
Required Gain”
Per_Cent_Gain_Error: = (Gain_Binary_OA -
Gain_Required / Gain_Required) x 100
Per_Cent_Gain_Error = -1.525 The error exceeds 1%. The
application will work but it is
not optimal.