Inovance MD520 Series Use and care manual

‑1‑
Preface
Preface
About This Guide
The MD520 series AC drive is a general‑purpose high‑performance current vector
control AC drive. It is designed to control and regulate the speed and torque of three‑
phase AC asynchronous motors. The AC drive can be used to drive textile machines,
paper machines, wire drawing machines, machine tools, packaging machines, food
machines, fans, water pumps, and other automated production equipment.
This guide describes the communication mode, communication networking, and
communication configuration of the AC drive.
More Documents
Document Name Data No. Description
MD520 Series General‑
Purpose AC Drive Quick
Installation and
Commissioning Guide
19011712
Describes the installation, wiring,
commissioning, troubleshooting,
parameters, and fault codes of the AC
drive.
MD520 Series General‑
Purpose AC Drive
Hardware Guide
19011713
Describes the composition, technical
specifications, components, dimensions,
options (including installation
accessories, cables, and peripheral
electrical components), and expansion
cards of the MD520 series AC drive, as well
as routine maintenance and repair, and
certification and standard compliance of
the AC drive.
MD520 Series General‑
Purpose AC Drive
Installation Guide
19011714
Describes the installation dimensions,
space design, specific installation steps,
wiring requirements, routing
requirements, and option installation
requirements of the AC drive, as well as
common EMC troubleshooting
recommendations.
MD520 Series General‑
Purpose AC Drive
Commissioning Guide 19011715
Describes the tools, processes, and
specific steps of commissioning of the AC
drive, as well as troubleshooting, fault
codes, and parameters related to the AC
drive.
MD520 Series General‑
Purpose AC Drive
Communication Guide
(this document)
19011716
Describes the communication method,
networking, and communication settings
of the AC drive.
MD520 Series General‑
Purpose AC Drive
Function Guide
19011717
Introduces function application, fault
codes, and parameters of the AC drive.

‑2‑
Preface
Revision History
Date Version Description
January 2022 A00 First release
How To Obtain
This document is not delivered with the product. You can obtain the PDF version of
this document by the following method:
Log in to Inovance's website (
www.inovance.com
), choose Support > Download,
perform keyword search, and download the PDF file.

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Preface.............................................................................. 1
Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1 Parameter Communication Addresses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1.1 Parameter Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1.2 Parameter Communication Addresses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1.3 Modbus‑specific Parameter Communication Addresses . . . . . . . . . . . . . . . . . . . . . . . . . 13
2 List of Communication Protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3 Modbus Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.2 Networking and Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.3 Transmission Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.4 Data Frame Structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.5 Related Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
3.6 Communication Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.6.1 Configuration of RS485 Communication Between AC Drive and H5U . . . . . . . . . . . 31
3.6.2 Configuration of RS485 Communication Between AC Drive and AM600 . . . . . . . . . 36
4 CANopen & CANlink Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
4.2 Networking and Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
4.3 Related Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
4.4 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
4.4.1 Data Frame Structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
4.4.2 Operation Instance (SDO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
4.4.3 Operation Instance (PDO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
4.5 Communication Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
4.5.1 Configuration of CANlink Communication Between AC Drive and H5U. . . . . . . . . . 60
4.5.2 Configuration of CANopen Communication Between AC Drive and H5U . . . . . . . . 65
4.6 Communication Faults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
4.6.1 Emergency Message and AC Drive Faults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
4.6.2 Simple Diagnosis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
5 PROFINET Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
5.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
5.2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
5.3 Interface Layout and Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
5.4 Topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Table of Contents

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5.5 Data Transmission Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
5.6 PZD Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
5.7 Related Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
5.8 Communication Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
5.8.1 Configuring Slaves on the S7‑1200 Master. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
5.8.2 MRP Function of the MD500‑PN1 Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
5.9 Fault Diagnosis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
5.9.1 Communication Faults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
5.9.2 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
6 EtherCAT Communication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
6.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
6.2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
6.3 Interface Layout and Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
6.4 Topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
6.5 PDO Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
6.6 SDO Mailbox Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
6.7 Related Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
6.8 Communication Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
6.8.1 Communication Instance of Controlling MD520 with an Omron Controller . . . . . 116
6.8.2 Communication Instance of Controlling MD520 with an H5U Controller. . . . . . . . 122
6.8.3 Communication Instance of Controlling MD520 with an AM600 Controller. . . . . . 126
6.8.4 Communication Instance of Controlling MD520 with a Beckhoff Controller. . . . . 130
6.9 Fault Diagnosis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
6.9.1 ECAT Card Communication Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
7 PROFIBUS DP Communication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
7.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
7.2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
7.3 Interface Layout and Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
7.4 Topology and Transmission Distance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
7.5 Protocol Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
7.6 Related Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
7.6.1 AC Drive Communication Card Type Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
7.6.2 Communication Control Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
7.7 Communication Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
7.7.1 Configuring a Slave on the S7‑300 Master in STEP 7 V5.4 . . . . . . . . . . . . . . . . . . . . 156
7.7.2 Configuring a Slave on the S7‑1200 Master in TIA Portal V13 . . . . . . . . . . . . . . . . . 162
7.7.3 Performing Periodic Read/Write Operations on the AC Drive Slave . . . . . . . . . . . . 171
7.7.4 Performing Aperiodic Read/Write Operations on the AC Drive Slave. . . . . . . . . . . 173
7.8 Fault Diagnosis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
Table of Contents

7.8.1 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
8 MD‑SI‑DP1 Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
8.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
8.2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
8.3 Interface Layout and Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
8.4 Topology and Transmission Distance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
8.5 Protocol Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
8.6 Related Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
8.6.1 Parameters related to Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
8.7 Communication Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198
8.7.1 Communication Instance Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198
8.7.2 Configuring a Slave on the S7‑300 Master in STEP 7 V5.4 . . . . . . . . . . . . . . . . . . . . 198
8.7.3 Configuring a Slave on the S7‑1200 Master in TIA Portal V13 . . . . . . . . . . . . . . . . . 204
8.7.4 Performing Periodic Read/Write Operations on the AC Drive Slave . . . . . . . . . . . . 213
8.7.5 Performing Aperiodic Read/Write Operations on the AC Drive Slave. . . . . . . . . . . 215
8.7.6 Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218
8.8 Fault Diagnosis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220
8.8.1 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220
9 EtherNet/IP Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227
9.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227
9.2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227
9.3 Interface Layout and Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228
9.4 Topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230
9.5 Protocol Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231
9.5.1 I/O Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231
9.5.2 Data Sent by the Master . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
9.5.3 Data Returned by the AC Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
9.6 Related Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
9.6.1 AC Drive Communication Card Type Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
9.6.2 MD500‑EN1 Card IP Address Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234
9.6.3 Parameters Related to AC Drive Communication Card . . . . . . . . . . . . . . . . . . . . . . 237
9.6.4 Communication Control Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237
9.6.5 Communication Monitoring Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238
9.7 Communication Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241
9.7.1 Using an MD500‑EN1 Expansion Card on an Allen‑Bradley L16ER Master . . . . . . . 241
9.7.2 Using an MD500‑EN1 Expansion Card on an Inovance AM600 Master . . . . . . . . . . 253
9.8 Fault Diagnosis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255
9.8.1 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255
Table of Contents

‑6‑
Safety Precautions
Safety Precautions
Safety Disclaimer
1. This chapter presents essential safety instructions for proper use of the AC drive.
Before using the product, please read the guide and make sure you understand the
safety instructions correctly. Failure to comply with the safety instructions may
result in death, serious injury, or equipment damage.
2. "CAUTION", "WARNING", and "DANGER" items in the guide are just supplementary
and do not cover all safety instructions.
3. Use this product in an environment that complies with the design specifications.
Malfunction or component damage caused by improper usage is not covered by
warranty.
4. Inovance shall take no responsibility for any personal injuries or property loss
caused by noncompliance with this guide or improper use of this product.
Safety Levels and Definitions
indicates that failure to comply with the notice will result in severe
personal injuries or even death.
indicates that failure to comply with the notice may result in severe
personal injuries or even death.
indicates that failure to comply with the notice may result in minor
personal injury or damage to the equipment.
Safety Precautions
●The drawings in this guide sometimes show the product without covers or
protective guards to display more details. When using this product, be sure to
install the casing or cover according to the regulations, and operate in accordance
with the guide.
●The product drawings in this guide are for reference only and may be slightly
different from the product you ordered.
Unpacking and Acceptance
●Do not install the product if any damage, rust, or sign of use is found on the product and
accessories.
●Do not install the product in case of water seepage in the product, part missing or part
damage.
●Do not install the product if you find the packing list does not conform to the product
you received.

‑7‑
Safety Precautions
●Before unpacking, check whether the packing is intact without damage, water seepage,
damp, and deformation.
●Unpack the package in sequence. Do not hit the package with force.
●Check the surface of the equipment and accessories for any damage or rust.
●Check the equipment, accessories, and materials in the package against the packing list
to ensure that no item is missing.
Storage and Transportation
●Use professional hoisting equipment operated by qualified professionals to carry large‑
scale or heavy products. Failure to comply may result in personal injury or product
damage.
●Before hoisting the product vertically, confirm that the front cover, terminal block, and
other parts of the product have been firmly fixed with screws. Failure to comply may
cause the parts to fall off and result in personal injury or product damage.
●Never stand or stay below the product that is lifted by hoisting equipment.
●Lift the product with a steel rope steadily at a constant speed to protect the product
against vibration, impact, or turnover. Do not keep the product lifted for a long time.
Failure to comply may result in personal injury or product damage.
●Handle the product with care and mind your steps. Failure to comply may result in
personal injury or product damage.
●When carrying the product with bare hands, hold the product casing firmly with care to
prevent parts from falling. Failure to comply may result in personal injury or product
damage.
●Store and transport the product as required. Failure to comply may result in product
damage.
●Avoid storage and transportation in environments subject to water splash, rain, direct
sunlight, strong electric field, strong magnetic field, and strong vibration.
●Avoid storing the product for more than 3 months. Long‑term storage shall require
stricter protection and necessary inspections.
●Pack the product strictly before transportation. Use a sealed box for long‑distance
transportation.
●Never transport this product with equipment or materials that may damage or have
negative impacts on this product.
Installation
●Only professional personnel with electrical expertise can operate this product.
Operations by non‑professionals are strictly prohibited.

‑8‑
Safety Precautions
●Read through the user guide and safety precautions before installation.
●Do not install this product in places subject to strong electric field or strong
electromagnetic wave interference.
●Before installation, make sure that the installation position is mechanically strong
enough to bear the weight of the equipment. Failure to comply may result in mechanical
hazards.
●Do not wear loose clothes or accessories during installation. Failure to comply may
result in an electric shock.
●When installing the product in a closed environment (such as a cabinet or a chassis),
cool the environment with a fan or an air conditioner to prevent overheat or fire.
●Do not modify this product.
●Do not fiddle with the bolts used to fix equipment components or the bolts marked in
red.
●When installing this product in a cabinet or terminal equipment, equip the cabinet or
terminal equipment with protective devices such as fireproof enclosures, electrical
protective enclosures, and mechanical protective enclosures with the protection level
that meets requirements of relevant IEC standards and local laws and regulations.
●Before installing equipment with strong electromagnetic interference, such as a
transformer, install an electromagnetic shielding device to prevent malfunctions of this
product.
●Install the product on incombustible objects such as metal and keep it away from
combustible materials. Failure to comply may result in a fire.
●Cover the top of the product with a piece of cloth or paper during installation to prevent
unwanted objects such as metal chippings, oil, and water from falling into the
equipment and causing faults. After installation, remove the cloth or paper to prevent
overtemperature caused by poor ventilation due to blocked ventilation holes.
●Resonance may occur when the equipment operating at a constant speed executes
variable speed operations. In this case, install the anti‑vibration rubber under the motor
frame or use the vibration suppression function to reduce the resonance.
Wiring
●Do not allow non‑professionals to perform equipment installation, wiring, maintenance,
inspection, or parts replacement.
●Cut off all power supplies before wiring. Wait for at least the time specified on the
product warning label after power‑off so that residual voltage can discharge safely.
Measure the DC voltage on the main circuit to ensure that it is within the safe voltage
range. Failure to comply may result in an electric shock.
●Do not perform wiring, remove the product cover, or touch the circuit board with power
ON. Failure to comply may result in an electric shock.
●Ensure that the product is well grounded. Failure to comply may result in an electric
shock.

‑9‑
Safety Precautions
●Never connect the power cable to an output terminal. Failure to comply may result in
product damage or even fire.
●When connecting a drive with the motor, ensure that the phase sequences of the drive
and motor are consistent to prevent motor reverse rotation.
●Ensure that the diameter and shielding of the cables used meet corresponding
requirements, and that the shielding layer of the shielded cables is grounded reliably at
one end.
●Tighten terminal screws with tightening torque specified in this guide. Failure to comply
may result in overheat and damage to the connection parts or even fire.
●After wiring, check that each cable is connected properly, no screws or gaskets fall into
the product, and no cables are exposed. Failure to comply may result in an electric
shock or product damage.
●Follow the proper electrostatic discharge (ESD) procedures, and wear an anti‑static wrist
strap during wiring. Failure to comply may result in damage to the product or the circuit
of the product.
●Use shielded twisted pair cables for the control circuit. Connect the shielding layer to the
product grounding terminal. Failure to comply may result in product malfunction.
Power-on
●Before power‑on, ensure that the product is properly installed, all cables are securely
connected, and the motor can be restarted.
●Before power‑on, ensure that the power supply meets requirements. Failure to comply
may result in product damage or even fire.
●Do not open the cabinet or protective cover, touch any terminal, or dismantle any device
or component when the product is powered on. Failure to comply may result in an
electric shock.
●After wiring and parameter setting, perform a trial run to check whether the device can
run properly. Failure to comply may result in personal injury or device damage.
●Before power‑on, check that the rated voltage of the product is consistent with that of
the power supply. Failure to comply may result in fire.
●Before power‑on, check that no one is near the equipment, motor, or machine. Failure
to comply may result in personal injury or even death.
Operation
●Do not allow non‑professionals to operate the product. Failure to comply may result in
personal injury or even death.
●Do not touch any wiring terminals or disassemble any unit or component of the
equipment during operation. Failure to comply may result in an electric shock.

‑10‑
Safety Precautions
●Never touch the product shell, fan, or resistor to check the temperature. Failure to
comply may result in burn.
●Prevent metal or other objects from falling into the product during operation. Failure to
comply may result in product damage or fire.
Maintenance
●Do not allow non‑professionals to perform equipment installation, wiring, maintenance,
inspection, or parts replacement.
●Never perform maintenance during power‑on. Failure to comply may result in an electric
shock.
●Before maintenance, cut off all equipment power supplies and wait for at least the time
specified on the product warning label.
●In case of a permanent magnet motor, do not touch the motor terminals immediately
after power‑off because the motor terminals will generate induced voltage during
rotation even after the equipment power supply is off. Failure to comply may result in an
electric shock.
●Perform daily and periodic inspection and maintenance on the equipment according to
maintenance requirements and keep a maintenance record.
Repair
●Do not allow non‑professionals to perform equipment installation, wiring, maintenance,
inspection, or parts replacement.
●Never perform any inspection or maintenance operations during power‑on. Failure to
comply may result in an electric shock.
●Before inspection or maintenance, cut off all equipment power supplies and wait for at
least the time specified on the product warning label.
●Require repair services according to the product warranty agreement.
●When the fuse is blown or the circuit breaker or earth leakage current breaker (ELCB)
trips, wait for at least the time specified on the product warning label before power‑on
or further operations. Failure to comply may result in equipment damage, personal
injury, or even death.
●When the equipment fails or is damaged, designate qualified technicians to
troubleshoot and repair the equipment in accordance with the maintenance
instructions and keep a maintenance record.
●Replace quick‑wear parts of the equipment according to the replacement guide.
●Do not use a damaged machine. Failure to comply may result in worse damages,
personal injury, or even death.
●Make sure to re‑check the wiring and parameter setting after device replacement.

‑11‑
Safety Precautions
Disposal
●Scrap the equipment or product in accordance with relevant national regulations and
standards. Failure to comply may result in property damage, personal injury, or even
death.
●Recycle retired equipment by observing industry waste disposal standards to avoid
environmental pollution.
Safety Signs
For safety operations, follow the safety signs on the equipment. Do not stain or
remove the safety signs. The safety signs are described as follows:
Safety Signs Description
●Read through the safety instructions before operating the equipment.
Failure to comply may result in equipment damage, personal injury, or
even death.
●Do not touch terminals or remove the cover during power‑on or within
10 minutes after power‑off. Failure to comply may result in an electric
shock.

Parameter Communication Addresses
‑12‑
1 Parameter Communication Addresses
1.1 Parameter Data
The parameters involve basic function parameters and monitoring parameters, which
are stored in the corresponding parameter group. Basic function parameters are
stored in groups F, A, B, C, and H, as listed in the following table.
Parameter data Group F (read/
write)
F0, F1, F2, F3, F4, F5, F6, F7, F8, F9, FA, FB, FC, FD, FE,
and FF
Group A (read/
write)
A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, AA, AB, AC, AD,
AE, and AF
Group B (read/
write)
B0, B1, B2, B3, B4, B5, B6, B7, B8, B9, BA, BB, BC, BD,
BE, and BF
Group C (read/
write)
C0, C1, C2, C3, C4, C5, C6, C7, C8, C9, CA, CB, CC, CD,
CE, and CF
Group H (read/
write)
H1 and H2
The following table lists the addresses for monitoring parameters, which involve the
operation command, running status, running parameters, and alarm information.
Monitoring
parameters
Status data (read‑
only)
U0, U2, and 3000H Note 1
Control parameters
(write‑only)
U3, 1000H, and 2000H to 2004H Note 1
Fault information
(read‑only)
H0, H3, H4, H5, H6, H7, and H8
Connector
information (read‑
only)
L0, L1, L2, L3, L4, L5, L6, L7, L8, L9, LA, LB,
LC, and LD
Note 1: 1000 H, 2000H to 2004H, and 3000H are Modbus‑specific communication
addresses.
1.2 Parameter Communication Addresses
There are multiple function parameters in each of the parameter groups F0 to FF and
A0 to AF. For example, F0‑16 indicates parameter number 16 in group F0. The higher
16 bits of the communication address for a function parameter are the function
parameter group ID, and the lower 16 bits are the hexadecimal format of the serial
number of the parameter in the function parameter group. For example, the
communication address of F0‑16 is 0xF010.

Parameter Communication Addresses
‑13‑
Writing basic function parameters and saving them upon power failure indicate
frequent operations on the EEPROM, which reduces its service life. Therefore, you can
modify some basic function parameters in the RAM through communication without
storing them.
For parameters in group F, you can change F in higher bits of the parameter address
into 0 to obtain the corresponding RAM address. For example, the communication
RAM address of F3‑12 is 0x030C.
For parameters in group A, you can change A in higher bits of the parameter address
into 4 to obtain the corresponding RAM address. For example, the communication
RAM address of A0‑05 0x4005.
For parameters in group B, you can change B in higher bits of the parameter address
into 5 to obtain the corresponding RAM address. For example, the communication
RAM address of B0‑05 is 0x5005.
For parameters in group C, you can change C in higher bits of the parameter address
into 6 to obtain the corresponding RAM address. For example, the communication
RAM address of C0‑05 0x6005.
Parameter Groups Access Address Parameter Address in RAM
F0 to FE 0xF000 to 0xFEFF 0x0000 to 0x0EFF
A0 to AF 0xA000 to 0xACFF 0x4000 to 0x4CFF
B0 to BF 0xB000 to 0xBFFF 0x5000 to 0x5FFF
C0 to CF 0xC000 to 0xCFFF 0x6000 to 0x6FFF
H0 to H6 0x8000 to 0x88FF ‑
U0 to U3 0x7000 to 0x73FF ‑
L0 to LD 0x9000 to 0x9DFF ‑
Note the following:
●Parameters in group FF cannot be read or modified
●Parameters in groups U0 and U2 are read‑only; parameters in group U3 can be
read and modified.
●1000H, 2000H to 2004H, and 3000H are Modbus‑specific communication
addresses.
1.3 Modbus-specific Parameter Communication Addresses
Table 1–1 Modbus‑specific parameter communication addresses
Parameter Address Parameter Description Parameter Address Parameter Description
1000H Communication reference
(decimal)
–10000 to +10000
1010H PID reference
1001H Running frequency 1011H PID feedback

Parameter Communication Addresses
‑14‑
Parameter Address Parameter Description Parameter Address Parameter Description
1002H Bus voltage 1012H PLC process
1003H Output voltage 1013H Pulse input frequency (unit:
0.01 kHz)
1004H Output current 1014H Feedback speed (unit: 0.1 Hz)
1005H Output power 1015H Remaining running duration
1006H Output torque 1016H AI1 voltage before correction
1007H Running speed 1017H AI2 voltage before correction
1008H DI input flag 1018H AI3 voltage before correction
1009H DO output flag 1019H Linear speed
100AH AI1 voltage 101AH Current power‑on duration
100BH AI2 voltage 101BH Current running duration
100CH AI3 voltage 101CH Pulse input frequency (unit: 1
Hz)
100DH Count input 101DH Communication reference
100EH Length input 101EH Actual feedback speed
100FH Load speed 101FH Main frequency X
‑ 1020H Auxiliary frequency Y

Parameter Communication Addresses
‑15‑
Table 1–2 Description of Modbus‑specific parameter addresses
Parameter Address Parameter Description
Frequency reference 1 set through
communication
1000H Communication reference (decimal)
–10000 to +10000
The communication reference is a
relative value (percentage). 10000
corresponds to 100.00%, and –10000
corresponds to –100.00%.
The communication references apply
when the frequency, torque upper
limit, V/f separation voltage, PID
reference, and PID feedback of the
MD520 AC drive are set through
communication.
As for frequency data, the
communication reference is a
percentage of the maximum frequency
(F0‑10). As for torque data, the
communication reference is a
percentage of the torque upper limit
(F2‑10 for motor 1 and A2‑48 for motor
2).
Frequency reference 2 set through
communication
7310H The unit of the written data is Hz. The
number of decimal places is consistent
with that defined by F0‑22. For
example, if the decimal value 1000 is
written, the frequency reference is
10.00 Hz when F0‑22 is set to 2.
Control command input to AC drive 1
(write‑only)
7311H 0: Stop according to the stop mode
defined by F6‑10
1: Run in forward direction
2: Run in reverse direction
3: Jog in forward direction
4: Jog in reverse direction
5: Coast to stop
6: Stop according to the stop mode
defined by F6‑10
7: Reset upon fault
Control command input to AC drive 2
(write‑only)
2000H 1: Run in forward direction
2: Run in reverse direction
3: Jog in forward direction
4: Jog in reverse direction
5: Coast to stop
6: Decelerate to stop
7: Reset upon fault

Parameter Communication Addresses
‑16‑
Parameter Address Parameter Description
Read AC drive state 1 3000H 1: Running in forward direction
2: Running in reverse direction
3: Stopped
4: Auto‑tuning
5: Faulty
Read AC drive state 2 7044H Bit0: Running state
Bit1: Forward/Reverse direction
Bit2: Whether a fault occurs
Bit3: Whether the output frequency
reaches the frequency reference
Bit4: Communication normal flag
Bit5 to Bit7: Reserved
Bit8 to Bit15: Fault code
Parameter lock password verification 1F00H If the actual password value is
returned, password verification is
passed. (If password protection is
disabled, that is, the password is 0,
0000H is returned.)
Parameter initialization 1F01H 1: Restore factory settings
4: Restore user parameters from
backup
501: Back up current user parameters
DO control 2001H Bit0: DO1 output control
Bit1: DO2 output control
Bit2: Relay 1 output control
Bit3: Relay 2 output control
Bit4: FMR output control
Bit5: VDO1
Bit6: VDO2
Bit7: VDO3
Bit8: VDO4
Bit9: VDO5
AO1 control (write‑only) 2002H 0 to 7FFF, indicating 0% to 100%
AO2 control (write‑only) 2003H 0 to 7FFF, indicating 0% to 100%
Pulse output control (write‑only) 2004H 0 to 7FFF, indicating 0% to 100%

Parameter Communication Addresses
‑17‑
Parameter Address Parameter Description
AC drive fault description 8000H 2: Overcurrent
5: Overvoltage
8: Pre‑charge power fault
9: Undervoltage
10: AC drive overload
11: Motor overload
12: Input phase loss
13: Output phase loss
14: Overheat
15: External fault
17: Pre‑charge circuit exception
18: Current sampling exception
19: Motor auto‑tuning exception
20: Encoder/PG card exception
21: EEPROM fault
22: Encoder card not activated
(To be continued)
Continued Continued Continued
23: Output short‑to‑ground
26: Accumulative running duration
reach
27: User‑defined fault
28: User‑defined alarm
29: Accumulative power‑on duration
reach
30: Output load loss
31: PID feedback loss during running
32: Parameter exception
40: Pulse‑by‑pulse current limit fault
42: Excessive speed deviation
43: Motor overspeed
45: Motor overtemperature
47: STO fault
(To be continued)

Parameter Communication Addresses
‑18‑
Parameter Address Parameter Description
Continued Continued Continued
51: Pole position auto‑tuning error
55: Master‑slave control fault
56: Self‑check fault 1
57: Self‑check fault 2
58: Self‑check fault 3
59: Self‑check fault 4
61: Braking overload
62: Braking transistor fault
63: External alarm
82: Pre‑charge contactor fault
85: Timing fault
93: Motor control exception 1
94: Motor control exception 2
159: Auto reset fault
160: Modbus timeout
161: CANopen fault
162: CANlink fault
164: Expansion card fault
174: Input exception protection

List of Communication Protocols
‑19‑
2 List of Communication Protocols
The MD520 series AC drive supports seven communication protocols in the form of
external communication expansion modules. For details, see the following table.
Communication Protocol Communication Hardware
Modbus External communication
expansion modules
RS485 communication
interface of MD520 series AC
drive
CANopen/CANlink CN1 interface of MD520 series
AC drive
PROFINET MD500‑PN1 communication
expansion card
PROFIBUS DP MD38DP2 communication
expansion card
EtherCAT MD500‑ECAT communication
expansion card
MD‑SI‑DP1 MD‑SI‑DP communication
expansion card
EtherNet/IP MD500‑EN1 communication
expansion card