6
Connecting the USB cable (CN4)
Using a USB cable of the following specification, connect a PC in which the
MEXE02
has been installed to the CN4 connector.
Specification
USB2.0 (full speed)
Cable
Length: 3 m (9.8 ft.) or less
Shape: A to micro B
y
Connect the driver and PC directly using the USB cable.
y
In large electrically noisy environments, use the USB cable with a
ferrite core or install a ferrite core to the USB cable.
Noise measures
The electrical noise is of two types: One is a noise to invade into the driver
from the outside and cause the driver malfunction, and the other is a noise to
emit from the driver and cause peripheral equipments malfunction.
For the noise that is invaded from the outside, take measures to prevent the
driver malfunction. It is needed to take adequate measures because signal
lines are very likely to be affected by the noise.
For the noise that is emitted from the driver, take measures to suppress it.
z
Measures against electrical noise
There are the following three methods mainly to take measures against the
electrical noise.
•
Noise suppression
y
When relays or electromagnetic switches are used together with the
system, use noise filters and CR circuits to suppress surges generated by
them.
y
Cover the driver by a metal plate such as aluminum. This is effective in
shielding the electrical noise emitted from the driver.
•
Prevention of noise propagation
y
Connect a noise filter on the input side of the DC power supply.
y
Use shielded twisted pair cables for power lines and signal lines.
y
Keep cables as short as possible without coiling and bundling extra lengths.
y
Grounding multiple points will increase effect to block electrical noise
because impedance on the grounding points is decreased. However,
ground them so that a potential difference does not occur among the
grounding points.
y
To ground a shielded cable, use a metal cable clamp that will maintain
contact with the entire circumference of the cable. Ground the cable clamp
near the product.
Cable clamp
Shielded cable
•
Suppression of effect by noise propagation
y
Loop the noise propagated cable around a ferrite core. Doing so will
prevent the propagated noise invades into the driver or emits from the
driver. The frequency band in which an effect by the ferrite core can be
seen is generally 1 MHz or more. Check the frequency characteristics of the
ferrite core used. To increase the effect of noise attenuation by the ferrite
core, loop the cable a lot.
Conformity to the EMC Directive
Effective measures must be taken against the EMI that the motor and driver
may give to adjacent control-system equipment, as well as the EMS of the
motor and driver itself, in order to prevent a serious functional impediment in
the machinery. The use of the following installation and wiring methods will
enable the motor and driver to be compliant with the EMC Directive. Refer to
p.7 for the applicable standards.
Oriental Motor conducts EMC measurements on its motors and drivers in
accordance with the ""Example of motor and driver installation and wiring"."
The user is responsible for ensuring the machine's compliance with the EMC
Directive, based on the installation and wiring explained below.
•
Connecting the power supply
Use a DC power supply conforming to the EMC Directive. Wire and ground the
power supply over the shortest possible distance using a shielded cable. Refer
to "Prevention of noise propagation" for how to ground the shielded cable.
•
How to ground
y
The cable used to ground the motor must be as thick and short as possible
so that no potential difference is generated.
y
Choose a large, thick and uniformly conductive surface for the grounding
point.
y
Make sure to ground the Protective Earth Terminal of the motor.
•
Example of motor and driver installation and wiring
The figure shows a wing example when the compact driver and the motor
(
AZM66
) are used.
Host controller
DC power supply
Grounding
Grounding
Grounding
AC
Grounding
Driver *1
Ferrite core
Grounded panel
Motor
Power/communication cable
(For connecting power supply
and host controller) *2
Connection cable *2
is a shield box.
*1 The driver is grounded by directly contacting the heat sink to the ground panel.
*2 Our cables are used.
The driver uses parts that are sensitive to electrostatic charge. Take
measures against static electricity since static electricity may cause
the driver to malfunction or suffer damage.
Alarm
When an alarm generates, the motor will stop. At the same time, the PWR/
ALM LED will blink in red. Before resetting an alarm, always remove the cause
of the alarm and ensure safety.
This section describes an alarm specific to the compact driver.
If an alarm not described here generates, refer to the OPERATING MANUAL
AZ
Series Function Edition.
Alarm code
29h
Number of times the LED blinks
9
Alarm type
CPU peripheral circuit error
Reset using the ALM-RST input
Not possible
Motor excitation
Non-excitation *
Cause
The CPU peripheral circuit was damaged.
Remedial action
Contact your nearest Oriental Motor sales
office.
* When an alarm generates, the motor current will be cut off and the motor will
lose its holding torque.
When an electromagnetic brake motor is used, the electromagnetic brake will
hold a load in position.
