About Control Input/Output - Vexta aStep AS Series Operating Manual

Note
Be sure to use the same voltage
for C.OFF, ×10 and ACL inputs
and TIM1/TIM2, ASG1/ASG2
and BSG1/BSG2 outputs.
Connecting both 5 and 24 VDC
power supplies may damage the
driver and power supplies.
Note
• If no pulse is to be input, be sure
to keep the photocoupler in
"OFF" state.
Do not input a CW pulse and
CCW pulse simultaneously.
If a pulse is input while the other
photocoupler is in the "ON" state,
the motor will not operate
properly.
• The direction of rotation is
defined as the rotation direction
of the motor shaft.
The output shaft of the TH geared
typed motors with ratios of 20:1
and 30:1, as well as all ratios of
the harmonic geared type
motors, rotate in the opposite
direction of the motor shaft.
36

About control input/output

Input signals
All input signals of the driver are photocoupler inputs.
For C.OFF input, ×10 input and ACL input a signal voltage of either 5 or 24 VDC can be
selected. Be sure to use it with voltage of either 5 or 24 VDC.
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.
The following explains the connection state in the case of current sink input.
CW, CCW
Driver internal circuit
220 Ω
9, 11
7∼20 mA
10, 12
CW pulse input and CCW pulse input
With this driver either 2-pulse input mode or 1-pulse input mode may be selected in accordance
with the controller used. Refer to page 44 for details on how to set the pulse-input mode.
ALARM output is in the "OFF" state immediately after the driver power is turned on. Check to
see that ALARM output has been turned from "OFF" to "ON" before inputting pulse signals.
For the electromagnetic-brake type, wait at least 0.1 second after releasing the
electromagnetic brake, then input pulse signals.
When an electromagnetic brake type is used, also refer to "Operating the electromagnetic brake"
at the end of this section.
2-pulse input mode (factory setting)
Connect the CW pulse and CCW pulse of the controller to pin No.12, "CW input," and pin No.
10, "CCW input," respectively.
1.
When the CW pulse input changes from the "OFF" state to "ON" state, the motor will
rotate one step in the CW direction.
2.
When the CCW pulse input changes from the "OFF" state to "ON" state, the motor will
rotate one step in the CCW direction.
ON
CW pulse input
OFF
ON
CCW pulse input
OFF
Motor operation
Set the input pulse voltage to the CW and CCW pulse inputs at 5 VDC.
If the voltage exceeds 5 VDC, insert an external resistor to limit the input current to nearly
10 mA.
Use an input-pulse signal with a waveform having a sharp rise and fall, as shown in the figure:
1 µs minimum
2 µs maximum
The figure shows the voltage levels of pulse signals.
3
21, 31, 33
22, 32, 34
∗
CW
CCW
-
V 1.5
-
R = 220 [Ω]
10 mA
H
90%
10%
L
2 µs maximum
H: 4~5 V
L: 0~0.5 V
ACL, ×10, C.OFF
Driver internal circuit
4.7 kΩ
5 mA
220 Ω
16 mA
∗ The minimum interval time needed for
switching the direction of rotation will
vary, depending on the operating speed
and size of the load.
Do not shorten the interval time any more
than is necessary.
2 µs minimum