Siemens MCC-3298 - Manual (Page 7)

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1 Introduction
Figure 1.2 Hand-Held Communicator (HHC)
1.2.3 Overload Protection
The motor model offers the selection of overload classes 2
through 23.
The SAMMS-LV device offers more accurate motor protection
than traditional thermal overload and most electronic motor
protection devices. This prolongs motor life by eliminating
nuisance tripping for multiple restarts, and allowing for proper
cool down time when the motor winding temperature reaches
a critically high value.
1.2.4 Programming Control Circuits
The SAMMS-LV device allows you to modify its configuration by
programming the microprocessor. The SAMMS-LV device
replaces conventional timers, overload relays, pushbuttons,
and selector switches.
SAMMS-LVE is preloaded with seven across-the-line control
circuits, and the desired control circuit can be selected using
the Hand-Held Communicator (HHC.) Alternatively, a custom
across-the-line circuit may be downloaded from a PC.
A library of more than 70 typical control circuits exists for use
with SAMMS-LVX to meet applications ranging from simple
across-the-line starters to complicated reduced-voltage start-
ers. With optional software, the specified control circuit can be
loaded either from the library or from a modified version into the
microprocessor’s memory, in the factory or on site, using an
IBM®-PC compatible computer. If you would like to learn more
about this software package, refer to SAMMS Custom Soft-
ware Manual, Bulletin CP 3291.
Highly specialized control circuits can be developed and exist-
ing circuits can be modified using an optional IBM-PC compat-
ible software package. This software uses conventional engi-
neering symbols along with pull-down menus and a mouse to
draw ladder diagrams. When you have finished drawing the
diagram, the software translates the diagram into microproces-
sor machine code and downloads it into the SAMMS-LV
device’s memory.
1.2.5 Using the Standardized Control Panel
The SAMMS-LV device can be used for local and/or remote
control. The SAMMS-LVE device provides two light bars, while
the SAMMS-LVX model provides three light bars. Each model
includes six pushbuttons with lights and tactile feedback. These
light bars and pushbuttons are programmed for the various
functions of the control circuit used.
The test/reset button is used to test and reset the overload
function and to test the front panel lights.
Diagnostics
Eight diagnostic LEDs, located on the front panel, provide
information about conditions affecting the motor.
Statistical Data about the Motor
The microprocessor’s memory stores statistical data about the
motor and displays this data on the Hand-Held Communicator
(HHC).
Real-Time Metering Data
The Hand-Held Communicator displays real-time metering
data.
Local Displaying of Motor and Circuit Data
The HHC and the eight (8) diagnostic LEDs display motor and
control circuit data. The eight (8) diagnostic LEDs are located on
the front panel of the device.
Communicating with Other Devices
The SAMMS-LV device communicates with other devices via
the ACCESS system. When connected to the ACCESS system,
the SAMMS-LV device provides two-way communication with
the Power Monitor™ display and monitoring unit, an IBM PC-
compatible computer running the Power Monitor PC™ com-
munications and supervisory software or another supervisory
device. This ability allows you to control and monitor motors
from a centralized location. You can have remote access to all
SAMMS-LV data such as diagnostics, statistical data, real-time
metering, and controller status. If you would like to learn more
about the ACCESS system, refer to Installing the ACCESS
System (manual no. SG-6028).