Vexta aStep AS Series Operating Manual page 39

Output signals
Driver output signals are photocoupler/open-collector output, transistor open-collector output
for the TIM1, ASG1 and BSG1 outputs, and line-driver output for the TIM2, ASG2 and BSG2
outputs.
The signal state represents the "ON: Carrying current" or "OFF: Not carrying current" state of
the internal photocoupler rather than the voltage level of the signal.
ALARM, END
Driver internal circuit
25, 29
26, 30
30 VDC 5 mA maximum
ALARM output
ALARM output remains "ON" when the driver is operating normally, then turns "OFF" when a
protective function is triggered.
Detect this ALARM output on the controller side and cancel the command to operate the motor
thereafter.
Error detection by the driver, such as overload and overcurrent during motor operation, turns
the ALARM output "OFF," blinks the ALARM LED on the driver, and simultaneously shuts off the
motor current to stop motor operation.
Count the number of the ALARM LED blinks to identify the particular protective function that has
been triggered. For details, refer to "Protective functions" on page 46.
ALARM LED
ALARM output
Motor movement
When the driver is operating normally.
END (Positioning complete) output
END output turns "ON" when motor movement is complete.
Conditions for the issuance of END output are as follows:
END output is issued when the pulse speed is 500 Hz or less, and the rotor has positioned
within ±1.8° of the commanded position.
Motor operation
END output
(Positioning complete)
17, 19, 27
Line driver output
18, 20, 28
13, 15, 23
Open-collector output
14, 16, 24
Blink
ON
(Alarm)
OFF
The motor stops due to inertial force.
When a protective function is triggered.
Movement
ON
OFF
TIM1, TIM2, ASG1, ASG2, BSG1, BSG2
Driver internal
+5 V
circuit
1
3
2
26C31 or
equivalent
30 VDC
15 mA maximum
Movement
Stop Stop
Note
Be sure to use the same voltage
for C.OFF, ×10 and ACL inputs
and TIM1/TIM2, ASG1/ASG2
and BSG1/BSG2 outputs.
Note
The operation of the
photocoupler is reversed on the
ALARM output only. The ALARM
output turns "OFF" when
protective function is triggered.
Note
The timing of the END output
turning "ON" after the pulse stops
will vary, depending on the
conditions of the load, the pulse
input, and the speed-filter
setting.
39