3-9
3-1 Servo Drive Specifications
3
Specifications
Control Input Details
Details on the input pins for the CN1 connector are described here.
îš„ RUN Command Input (RUN)
Pin 2: RUN Command Input (RUN)
Function
 This input turns ON the power drive circuit for the main circuit of the Servo Drive. The Servomotor
cannot operate without the input of this signal (i.e., servo-OFF status).
 The RUN Command Input is enabled approximately 2 seconds after the power supply is turned
ON.
 After turning ON the RUN Command Input, wait for a minimum of 100 ms to lapse before inputting
pulses or a speed command.
îš„ Alarm Reset Input
Pin 3: Alarm Reset Input (RESET)
Function
 Pin 3 is the external reset signal input for Servo Drive alarms. (The alarms are reset when this
signal is input.)
 Eliminate the cause of the alarm before resuming operation. To prevent danger, turn OFF the RUN
Command Input first, then input the alarm reset signal.
 Resetting is performed after the Alarm Reset Input is kept ON for 120 ms or longer.
 Some alarms cannot be cleared using the Alarm Reset Input. For details, refer to 8-2 Alarm Table.
îš„ Deviation Counter Reset/Internally Set Speed Selection 2 Input
Pin 4: Deviation Counter Reset/Internally Set Speed Selection 2 Input (ECRST/VSEL2)
Function: Deviation Counter Reset
 Pin 4 is the Deviation Counter Reset Input (ECRST) in Position Control Mode (when Pn02 is set
to 0 or 2).
 When the deviation counter reset signal turns ON, the value of the deviation counter will be reset
and the position loop will be disabled.
 Input the reset signal for 2 ms minimum. The counter may not be reset if the signal is too short.
Function: Internally Set Speed Selection 2
 Pin 4 is the Internally Set Speed Selection 2 Input (VSEL2) in Internal Speed Control Mode (when
Pn02 is set to 1).
 Four speeds can be selected by using pin 4 in combination with the Internally Set Speed Selection
1 Input (VSEL1).
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