2.6 Control circuit 1 2.6.1 Details on the control circuit terminals 2 Input signal 3 4 5 6 7 8 9 10 69 2. INSTALLATION AND WIRING 2.6 Control circuit Type Terminal symbol Common Terminal name Terminal function description Rated specification Refer to page Contact input STF*1 SD (sink (negative common)) PC (source (positive common)) Forward rotation start Turn ON the STF signal to start forward rotation and turn it OFF to stop. When the STF and STR signals are turned ON simultaneously, the stop command is given. Input resistance: 4.7 kΩ, voltage when contacts are open: 21 to 27 VDC, current when contacts are short-circuited:
4 to 6 mADC 741 STR*1 Reverse rotation start Turn ON the STR signal to start reverse rotation and turn it OFF to stop. STP (STOP)*1 Start self-holding selection Turn ON the STP (STOP) signal to self-hold the start signal. 741 RH RM RL*1 Multi-speed selection Multi-speed can be selected according to the combination of RH, RM and RL signals. 417 JOG*1 Jog mode selection Turn ON the JOG signal to enable JOG operation (initial setting) and turn ON the start (STF or STR) signal to start JOG operation. 416 Pulse train input Terminal JOG is also used as a pulse train input terminal. To use as a pulse train input terminal, change the Pr.291 setting. (maximum input pulse:
100k pulses/s) Input resistance: 2 kΩ, current when contacts are short-circuited: 8 to 13 mADC 413 RT*1 Second function selection Turn ON the RT signal to enable the second function. When the second function such as "Second torque boost" and "Second V/F (base frequency)" is set, turning ON the RT signal enables the selected function. Input resistance: 4.7 kΩ, voltage when contacts are open: 21 to 27 VDC, current when contacts are short-circuited: 4 to 6 mADC 544 MRS*1 Output stop Turn ON the MRS signal (2 ms or more) to stop the inverter output. Use this signal to shut off the inverter output when stopping the motor with an electromagnetic brake.
542 RES*1 Reset Use this signal to reset a fault output provided when a protective function is activated. Turn ON the RES signal for 0.1 second or longer, then turn it OFF. In the initial setting, reset is always enabled. By setting Pr.75, reset can be enabled only at an inverter fault occurrence. The inverter recovers about 1 second after the reset is released. 342 AU*1 Terminal 4 input selection The terminal 4 function is available only when the AU signal is ON. Turning the AU signal ON makes terminal 2 invalid. 513 CS*1 Selection of automatic restart after instantaneous power failure When the CS signal is left ON, the inverter restarts automatically at power restoration.
Note that restart setting is necessary for this operation. In the initial setting, a restart is disabled. 647, 654