www.fastech-motions.com - 37
26. Diagnosis and Rectification of Faults
26.1 When the Alarm LED is not Blinking
Even though the alarm LED is not blinking if the motor can not be operated as normal, please refer to
below chart.
Phenomenon
Possible Cause
Rectification
Motor axis can be moved by
hand
Servo On/Off input is [ON].
When Alarm LED(RED) does not blink this is not a
state of Motor Servo On. Please check signal of
Controller.
Motor axis can not be moved
by hand
Bad connection of input terminal.
Please check connection between Controller and
Drive.
When Pulse Mode of Drive is CW/CCW input
method (2Pulse input method), CW+ line and
CW- line may have been reversed or CCW+
line and CCW- line may have been reversed.
Please check connection status of CW+, CW-,
CCW+ and CCW- lines.
The brake is locked. (Only for brake installed
type)
Please loosening the brake by energized.
Motor shaft moves only one
direction
Pulse Mode of Drive is set as CW/CCW input
method (2Pulse input method), then Controller
send Pulse by Pulse/Dir method(1Pulse method).
Please check signal method of Controller.
Pulse Mode of Drive is set as Pulse/Dir input
method(1Pulse input method), then Controller
send Pulse by CW/CCW method(2Pulse method).
Please check signal method of Controller.
Motor axis moves in the
opposite direction to the
specified direction
When Pulse Mode of Drive is CW/CCW input
method (2Pulse input method), CW input and
CCW input is connected reversely.
The CW Pulse signal should be connected to CW
input, CCW Pulse signal should be connected to
CCW input.
Motion of motor is unstable
Bad connection of Pulse signal cable
Please check connection of Controller and Drive.
No retention of the brake
The brake is released.
(Only for brake installed type)
Please stop the power supply to brake, so keep the
locked state of brake.
Motor axis movement does not
match to the set amount
The setting of resolution is difference.
Please check setting switch of resolution
(SW2)
