Rockwell Automation 23P PowerFlex DC Stand Alone Regulator and Gate Amplifier - Manual (Page 32)

32 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 = 108.758
Value to use - 109, Binary = 1101101
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: = 1 B5: = 1 B4: = 0 B3: = 1 B2: = 1 B1: = 0 B0: = 1
DIP Switch
Setting
SW3-1
= Off SW3-2
= Off SW3-3
= Off SW3-4
= Off SW4-1
= Off SW4-2
= On SW4-3
= On SW4-4
= Off SW4-5
= On SW4-6
= On SW4-7
= Off SW4-8
= On
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 = 9.394
R_input = 20 Fixed input resistor
Gain_Binary_OA: = R_fdbk / R_input
Gain_Binary_OA = 0.47 versus Gain_Required = 0.471 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 = -0.222