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SPECIFICATIONS 1.6.7 Reset Signal (Terminal RES) Used to reset the alarm stop state established by the Operation is enabled within 0.2 seconds after the terminals protective function of the inverter activated. The reset RES and SD are disconnected. signal immediately sets the control circuit to the initial The reset terminal is used to reset the inverter alarm stop (cold) state, e.g. initializes the electronic thermal relay and state. If the reset terminal is connected, then disconnected built-in brake resistor overheat protection circuit. It shuts while the inverter is operating, the motor may be restarted off the inverter output at the same time. During reset, the during coasting (refer to the following timing chart) and the inverter output is kept shut off. To give this reset input, output may be shut off by overvoltage. connect terminals RES and SD for more than 0.1 second. Note that frequent resetting will make the electronic When the connection time is long, the PU displays the thermal relay and brake resistor overheat protection initial screen, which is not a fault. invalid. Motor speed There is strong possibility of inverter output shut-off if motor is restarted during coasting. Coasting Coasting time ON Across RES-SD Coasting to stop (Indicates motor speed) ON ON Across STF (STR)-SD Approximately 0.2s Approximately 0.2s T T: Must be greater than the time required for coasting to stop. Reset Input Timing Chart During Normal Operation 1.6.8 External Transistor Common (Terminal PC) When the transistor output (open collector) of a Inverter PC programmable controller (PC) having an external power supply is input to the inverter, supply external interface PC DC12/24V power to prevent a fault from occurring due to leakage Photo-coupler currents as shown below. By connecting as shown in the right figure, the external power is supplied to the photocoupler in the inverter as Y00 Photocoupler STF indicated by the dotted lines. Since terminal SD is not External power supply connected, no power is supplied to the photocoupler from the control power supply of the inverter. Inverter control power supply SD 0V Terminal PC Connection Example 25