User Manual of A90 Series Inverter “7005H (communication setting of process PID feedback)”, and the 7005H data range is -100.00% to 100.00%, as detailed in Table 0-2. The process PID action mode depends jointly on the setting of the function code F09.04 and the status of the input function “44: PID positive/negative action switching”, as detailed in Table 7-12. Table 7-12 Description of PID Positive/Negative Action Note: The deviation in PID control is usually “setting - feedback”. When the feedback signal is greater than the PID setting, the output frequency of the inverter should decrease for PID balance. Take the water supply control as an example.
When the pressure increases, the pressure feedback will increase. The output frequency of the inverter must be decreased to reduce the pressure and keep the constant pressure. In this case, the PID should be set to the positive action. When the feedback signal is greater than the PID setting, the output frequency of the inverter needs to increase for PID balance. Take temperature control as an example. The PID regulator needs to be set to negative action to control the temperature. 201 Function Default Function code name Parameter description Unit Attribute code setting F09.04 PID positive and negative action selection 0: positive 1: negative 0 ○ F09.04 44:
PID positive/negative Mode of action Note switching 0 0 Positive action Both the deviation and output are positive. 0 1 Negative action The deviation is positive and the output is negative. 1 0 Negative action The deviation is positive and the output is negative. 1 1 Positive action Both the deviation and output are positive. Function Default Function code name Parameter description Unit Attribute code setting F09.05 Proportional gain 1 0.00-100.00 0.40 ●