MD320/MD320N User Manual Preface
Preface
Thank you for purchasing MD320/MD320N series inverters.
This instruction manual describes how to properly use MD320/MD320N series inverter. Please
read the instruction manual carefully before using(Before installation,operation,maintenance
and inspection).Besides, please use the product after understanding the safety precautions.
Precautions
? The drawings presented in this instructions are sometimes shown without
covers or protective guards.Always replace the equipment’s cover or
protective guard as specified first,and the operate the products in accordance
with the instructions.
? The drawings presented in the instructions are typical examples and may not
match the product you received.
? These instructions are subject to change due to product improvement,
specification modification, specification modification.
? If you want to order the manual due to loss or damage, please contact our
company agents in each region or our company customer service center
directly.
? If there is still any problem during using the product, please contact our
company customer service center directly.
? Our Service Hotline: 400-777-1260.
1Preface MD320/MD320N User Manual
Introduction
The MD series of frequency converters is a new generation of modular, high performance
frequency converters that represent the future of inverters. Compared with traditional inverters,
in meeting the performance and function demands of customers, this series does not use
multiple products (which add external manufacturing, sales, user and maintenance costs),
but instead creates a modular design based on the specific needs of the customer, resulting
in a customized platform that incorporates a single series of products that are a multi-module
assemblies.
MD series inverter creates three new concepts in the future inverter sector:
1) It creates the three-layer modular structure standard of new generation of inverter. Refer to
Figure 1 for the comparison between traditional inverter and MD series modular inverter;
2) It creates the physical standard for dividing the customer requirements according to such
main modules as motor drive module, general functional module and specialized functional
module as well as various sub-modules. Refer to Figure 2 for the schematic diagram for the
modular structure of MD series inverter;
3) It leads the new industry trend of popularizing the vector control technology.
Such concepts will bring about profound influences on the inverter industry. The modular
structure is described as follows:
MD Series Inverter
SpecializedIndustrial Module Top-layerModule
Traditional
Inverter General-PurposeModule Middle-layerModule
High-PerformanceMotor
Control Module Bottom-layerModule
Fig. 1 Comparison between Traditional Inverter and MD Series Modular Inverter
2MD320/MD320N User Manual Preface
1) The bottom-layer module of the MD series inverter is high-performance motor control
module and consists of V/F, speed sensorless vector control (SVC) and vector control. It is
mainly responsible for high performance control and overall protection of the motor, controlling
the motor through sending running commands to multiple channels or performing close loop
vector control through encoder interface.
2) The middle-layer module of MD series inverter is general functional module, which mainly
includes some basic functions of the inverter, such as PID control, MS speed, and swing
frequency and so on. According to the degree of complexity of functions, Inovance Technology
provides two sub-modules for options of the customers, that is, MD320 functional module and
MD300 functional module. Refer to Table 1 for the difference between the two modules.
Table 1 Difference between MD320 and MD300 Functional Modules
MD320 MD300
Five DI (bidirectional input
Four DI (unidirectional input
and one high-speed port), two
and one high-speed port), two
Input/output terminal AI, two DO (one high-speed
AI, one DO, one AO, and one
port), one AO, and one relay
relay
(expandable I/O)
Control mode SVC、VC、V/F SVC、V/F
Multiple-point fold line mode,
which is easy to realize the
Analog setup mode Straight line mode
functions of the injection
molding machine
MS speed Be able to realize 16S speed Be able to realize 4S speed
Be able to realize 16S timing
PLC Simple PLC None
operation
Swing frequency and
Available None
fixed-length control
Main/auxiliary reference of
Main/auxiliary setup Only A12 can be auxiliary setup
any channel
Communication function Via the expansion card Via the specialized card
PID control Available None
Multiple-point V/F Available None
3Preface MD320/MD320N User Manual
4
IE
Interface
Card
Control
Card
Water
Supply
Card I/O
Expansin
Bus