PM866A-2 3BSE081230R1 Cooperate with the power control board card

PM866A-2 3BSE081230R1 Cooperate with the power control board card

For PLC working modes that have both manual and automatic modes that cannot be executed simultaneously, PM866A-2 3BSE081230R1 allows input points from different working modes to share the same PLC input point. The wiring diagram for the extension of I/O points for time-sharing grouping input is shown in Figure PM866A-2 3BSE081230R1 is used to input automatic/manual command signals for switching between automatic and manual programs; Diodes are used to cut off parasitic circuits and avoid the generation of erroneous signals; SA is used to switch between automatic and manual operation modes.

PM866A-2 3BSE081230R1 analyzes and calculates the pressure deviation and the rate of change of pressure deviation based on the manually set pressure signal and the feedback signal of the on-site pressure sensor through PLC. After PID calculation, it is inputted in groups and time division
PM866A-2 3BSE081230R1 outputs an analog signal of 0-5V to the frequency converter to adjust the motor speed and perform soft starting of the motor; PLC compares the deviation between analog output and pressure, drives the switching relay group through the output of I/O port switch quantity, coordinates the number of motors put into operation, and completes the start stop, frequency conversion, and power frequency switching of the motors. By adjusting the number of motors put into operation in the motor set and controlling the variable frequency speed of one motor in the motor set, the working pressure of the power system is stabilized, thereby achieving the goal of constant pressure water supply.