Control Techniques M'Ax 403, Руководство пользователя

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M’Ax User Guide
Issue Number: 4
1.6 Programming the Drive
The Drive is configured and controlled by the adjustment of software
parameters. These reside in menus, as follows:
Menu 0
Menu 0 contains a group of parameters that apply to simple
applications; these parameters are duplicates of certain advanced
parameters (see below).
Advanced menus
The advanced menus are numbered 1 to 13; and contain all the
(advanced) parameters, which are grouped according to function.
After adjustment, new parameter-values can be saved for future use.
The Drive can be restored to its default state (all parameters returned to
their default values). This is normally performed during the initial setting-
up of the Drive, and can be performed again at any appropriate time.
See also Automatic setting up of the Drive for the motor below.
1.7 Automatic setting up of the Drive for
the motor
At power-up all the motor characteristics are automatically read from the
motor via the SLM. This substantially reduces the setting-up time.
The Drive has a facility initiated by the user for calculating the PID gains
from user-specified stiffness-angle and load-inertia figures, as well as
from the motor characteristics. The calculated values are then
automatically entered into the appropriate parameters. If a motor is
subsequently replaced by one of a different size or type, this calculation
will require repeating.
1.8 Braking resistor
The Drive is fitted with an internal braking resistor; either this resistor or
an external braking resistor can be used for dissipating regenerated
energy.
1.9 Thermal protection of the motor
The Drive protects the motor from thermal overload without the need for
an external thermistor.
When the motor is running, every 125ms a thermal-modelling function in
the SLM updates an accumulator whose value represents the
temperature of the motor windings. If the value of the accumulator
reaches a level that indicates the motor windings are at the specified
maximum safe working temperature, the output current is limited to a
specified level and a motor thermal-overload alarm is produced. This
alarm can be applied to, or read by, the system or motion controller to
initiate reduction of demand, otherwise continued demand at this level
will cause the Drive to trip and cease controlling the motor.
Initial conditions are read by the Drive, as follows:
• The thermal characteristics of the motor are obtained by the Drive
during setting-up (described in Automatic setting up of the Drive for
the motor).
• Each time the Drive is powered-up, the value of the initial motor
temperature is obtained from a thermistor embedded in the SLM.
Adjustments can be made to the motor-protection function, so that the
Drive provides an early warning to the host before it starts current
limiting. Preventative action can then be taken.
1.10 Features of the M’Ax
General _AN _SL
Continuous output current ratings of 3.5A, 6.5A, 9.5A,
12.5A
200% overload for up to 2 seconds
AC supply 380 ~ 480V ±10% category III
Compact IP20 case
EMC compliance (immunity and emission)
Parallel connection of DC-buses
Internal 125W braking resistor with fail-safe protection
Operation alternatively with an external braking
resistor
I
2
t protection for:
Drive
Motor
Internal braking resistor
Controlled stop on loss of AC supply
For use with 2-, 4-, 6- or 8-pole
CT Unimotors SL75 to SL190
SLM conversion kit available for use with other motors
6000 rpm motor-speed capability
Short-circuit protection for all 24V supply outputs
24V SLM-and-user back-up supply input primarily to
maintain position information in the SLM
28V 2A Auxiliary back-up supply input for keeping the
control circuits powered or for setting up the Drive
without an AC supply; the external supply can also be
used to power the motor at low speed for positioning
purposes
68mm
(2 /
16
in)
11
295mm
(11 /
8
in)
5
246mm
(9 /
16
in)
11