Rockwell Automation 23P PowerFlex DC Stand Alone Regulator and Gate Amplifier - Manual (Page 36)

36 Rockwell Automation Publication 23P-UM001D-EN-P - July 2012
Chapter 2 Stand Alone Regulator Installation, Wiring and Configuration
Checking the Maximum Voltage Feedback to Regulator
Binary Gain Calculation and Checking Gain Error
Binary_Sw_Setting = 47.268
Value to use - 47, Binary = 101111
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
Vb_at_IdN_pm_rtg = 0.565 Volts
Gain_Required: = Vf_at_IdN_pm_rtg /
Vb_at_IdN_pm_rtg
Gain_Required = 1.083 Note: Required Gain = 1.083,
which is within the
Recommended Gain <= 1.2 (for
best accuracy)
Value/Calculation Units Description
Binary_Sw_Setting: = 51.2 / Gain_Required
Binary_Sw_Setting = 47.268
Ib_at_IOC: = (IdN_pm_trg x IOC_mult / CT_ratio)
Ib_at_IOC = 0.282 Amps
Vb_at_IOC: = (IdN_pm_rtg x IOC_mult / CT_ratio)
Vb_at_IOC = 1.412 Volts
V_curr_fdbk_to_reg_at_IOC: = Gain_Required x
Vb_at_IOC Maximum allowable value of
V_curr_fdbk_to_reg_at_IOC =
2.5V
V_curr_fdbk_to_reg_at_IOC = 1.53 Volts
Value/Calculation Units Description
MSB LSB
Bit Value
B11: = 0 B10: = 0 B9: = 0 B8: = 0 B7: = 0 B6: = 0 B5: = 1 B4: = 0 B3: = 1 B2: = 1 B1: = 1 B0: = 1
DIP Switch
Setting
SW3-1
= Off SW3-2
= Off SW3-3
= Off SW3-4
= Off SW4-1
= Off SW4-2
= Off SW4-3
= On SW4-4
= Off SW4-5
= On SW4-6
= On SW4-7
= On 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