User Manual EM303B General Purpose Inverter F0-21=0 ＋／－ on keypad is for jog running function. F0-21=1 JOG ＋／－ on keypad is for positive/negative input switching function, i.e. when the settings are positive speed, positive PID, and positive torque, JOG ＋／－ is for switching to negative speed, negative PID, and negative torque. F0-21=2 JOG ＋／－ on keypad is disabled. JOG F0-22 is for setting speed display. If F0-22=0, the reference input value displayed on keypad is the target output frequency of inverter. If F0-22=1, the reference input value is the target output speed of inverter. F0-23 Customer defined scaling.
Mechanical speed = Mechanical speed coefficient (Customer defined scaling) * Output frequency. When the unit of setting speed is rpm, adjusting the parameter of F0-23 will make the displayed value of motor speed match the actual value. F0-08 Motor running direction: F0-08=0 is forward. When F0-24=0 reverse permitted, the running direction will be switched as reverse when F0-08=1. Permission of Motor Forward/Reverse F0-24=0 Reverse permitted Motor’s running direction is set by F0-08, or controlled by terminal F/R. F0-24=1 Reverse prohibited Motor can only run in one direction. F0-08 parameters are disabled, and terminal F/R is off.
Deadband of Switching the Forward/ Reverse of Motor If F0-25=0.00, there is no deadband of forward/reverse. If F0-25≠0, when forward/reverse switches, the inverter runs at 0Hz in the time set by F0-25 as the motor speed drops to 0Hz, and then runs to setting frequency in opposite direction. As shown in Figure7-6. Figure 7-6 Forward/Reverse Deadband 90 No. Function Range Unit Default Type Speed Monitoring Options 0: Frequency Hz 1: Speed rpm 0 ● F0-22 F0-23 Customer Defined Scaling 0.01~600.00 30.00 ● No. Function Range Unit Default Type Motor Running Direction 0: Forward 1:Reverse 0 ● F0-08 Forward/Reverse Control Mode 0: Reverse Permitted 1:
Reverse Prohibited 0 〇 F0-24 F0-25 F/R Deadband Time 0.00~600.00 S 0.00 〇