5.6 H: Terminal Functions Gain = 100 % Frequency reference Bias = 0 % 0 V 10 V Figure 5.28 Analog Input A1 Default Characteristics Setting Examples • Gain H3-03 = 200%, A1 as frequency reference input: An input 10 Vdc will be equivalent to a 200% frequency reference and 5 Vdc will be equivalent to a 100% frequency reference. Since the drive output is limited by the maximum frequency parameter (E1-04), the frequency reference will be equal to E1-04 above 5 Vdc.
Gain = 200 % Frequecny reference 100 % E1-04 Bias = 0 % 10 V 5 V 0 V Figure 5.29 Frequency Reference Setting by Analog Input with Increased Gain • Bias H3-04 = -25%, A1 as frequency reference input An input of 0 Vdc will be equivalent to a -25% frequency reference. When parameter H3-01 = 0 the minimum frequency reference is 0% between 0 and 2.5 Vdc input. An analog input of 2.5 to 10 Vdc will now be the same as 0 to 100% of the frequency reference span. When parameter H3-01 = 1, the motor will rotate in reverse between 0 and 2.5 Vdc input.
Gain = 100 % Frequency reference H3-01 = 0 2.0 V 0 10 V Bias = -25% H3-01 = 1 Figure 5.30 Frequency Reference Setting by Analog Input with Negative Bias • Gain = 0%, Bias = 100%, A1 as frequency reference input This setting leads to an inverse-acting frequency reference. The minimum analog input level (0 Vdc) will produce a 100% frequency reference and the maximum analog input level (10 Vdc) will produce a 0% frequency reference. Bias = 100 % Frequency reference 0 V 10 V Gain = 0 % Figure 5.31 Frequency Reference Setting by Analog Input with Inverse Gain and Bias Settings 100 SIEP C710606 33A OYMC AC Drive – J1000 User Manual