ZENEX AUTOMATION RS485-ZDM556-C User manual

User Manual For RS485-ZDM556C Stepper Drive
Office Add. : C-83, Zaveri Industrial Estate, Kathwada – Singarva Road, Kathwada, Ahmedabad-382430.
Email : [e-mail] ,Website : www.zenexautomation.net
Contact (M) : +91 – 9727764623 / +91 - 9978030413
RS485-ZDM556-C
RS485 Modbus Stepper Drive

User Manual For RS485-ZDM556C Stepper Drive
Office Add. : C-83, Zaveri Industrial Estate, Kathwada – Singarva Road, Kathwada, Ahmedabad-382430.
Email : [e-mail] ,Website : www.zenexautomation.net
Contact (M) : +91 – 9727764623 / +91 - 9978030413
Contents
Part 1:RS485-ST68D................................................................................................................................................. 5
Hardware Manual.................................................................................................................................................... 5
1 Descriptions.......................................................................................................................................................... 5
2 Features ................................................................................................................................................................ 5
3 Applications .......................................................................................................................................................... 5
4 Specifications........................................................................................................................................................ 6
4.1 Electrical Specifications ........................................................................................................................ 6
4.2 Operating Environment ........................................................................................................................ 6
5 Mechanical Specifications.................................................................................................................................... 6
6 Connectors and Pin Assignment........................................................................................................................... 7
6.1 Control signals connector...................................................................................................................... 7
6.2 Encoder Feedback and hall signal Connector........................................................................................ 8
6.3 Power and Motor.................................................................................................................................. 9
6.4 RS485 Communication Port ................................................................................................................ 10
7 DIP Switch Settings ............................................................................................................................................. 11
7.1 RS485 ID Table.......................................................................................................................................11
7.2 RS485communication Baud-Rate Table................................................................................................11
7.3 SW8: The terminal resistor selection for RS485................................................................................... 12
8 Stepper Motors ................................................................................................................................................. 12
8.1 Nema23motor .................................................................................................................................... 12
8.2 Nema24motor .................................................................................................................................... 12
8.3 Nema34motor .................................................................................................................................... 12
9 Wiring Diagrams ............................................................................................................................................... 13
9.1 Interface.............................................................................................................................................. 13
9.2 Diagram............................................................................................................................................... 14
10 Protection Indications..................................................................................................................................... 14
11 Frequently Asked Questions............................................................................................................................. 14
Problem Symptoms and Possible Causes................................................................................................... 15
12 Warranty ......................................................................................................................................................... 15
Exclusions................................................................................................................................................... 16
Obtaining Warranty Service ...................................................................................................................... 16
Warranty Limitations ................................................................................................................................ 16
Part 2 :RS485-ST68D............................................................................................................................................ 17
RS485 Communication Protocol Specification...................................................................................................... 17
1 Network Layout................................................................................................................................................. 17
2 Communication function................................................................................................................................... 17
2.1 Communication protocol .................................................................................................................... 17
2.2 Modbus Register Address Definition(drive parameter list) ................................................................. 18
2.2.1 Drive Control Register.......................................................................................................... 20
2.2.2 Drive Status Register ........................................................................................................... 20
2.3 Homing Function................................................................................................................................. 21
2.3.1 Return to zero point with the positive limit as zero point.................................................... 21
2.3.2 Return to home point with the negative limit as home point.............................................. 21
2.3.3 Exit home returning mode................................................................................................... 21
2.4 General function code.......................................................................................................................... 22
2.4.1 Read And Keep Register Command 0x03 ............................................................................ 22

User Manual For RS485-ZDM556C Stepper Drive
Office Add. : C-83, Zaveri Industrial Estate, Kathwada – Singarva Road, Kathwada, Ahmedabad-382430.
Email : [e-mail] ,Website : www.zenexautomation.net
Contact (M) : +91 – 9727764623 / +91 - 9978030413
2.4.2 Write single Register Command 0x06.................................................................................. 22
2.4.3 Write multi-Register Command 0x10................................................................................... 22
2.5 CRC Verification Example..................................................................................................................... 23
2.6 Communication error code.................................................................................................................. 24
2.7 How to make the motor run during a short time................................................................................. 24
Contact us:..............................................................................................................................................................25

User Manual For RS485-ZDM556C Stepper Drive
Office Add. : C-83, Zaveri Industrial Estate, Kathwada – Singarva Road, Kathwada, Ahmedabad-382430.
Email : [e-mail] ,Website : www.zenexautomation.net
Contact (M) : +91 – 9727764623 / +91 - 9978030413
This User Manual of RS485-ST68D Included:
Part 1:RS-485-ST68D hardware manual
This part for hardware, function description, parameter configuration, etc.
Part 2 :RS485-ST68D RS485communication protocol specification
This part for RS485 Modbus communication protocol.
Notice!
Read this manual carefully before any assembling and using. Incorrect handling of products in this manual can
result in injury and damage to persons and machinery. Strictly adhere to the technical information regarding
installation requirements.
This manual is not for use or disclosure outside of ZENEX AUTOMATION exceptunder permission. All rights are
reserved. No part of this manual shall be reproduced, stored in retrieval form, or transmitted by any means,
electronic,mechanical, photocopying, recording, or otherwise withoutapproval from ZENEX AUTOMATION.
While every precaution has been taken in the preparation of the book,ZENEX AUTOMATION assumes no
responsibility for errors or omissions. Neither is any liability assumed for damages resulting from the use of the
information contained herein.
This documentis proprietary information ofZENEX AUTOMATION that is furnished for customer use ONLY.
Information in this document is subject to change withoutnotice and does not represent a commitment on the
part of ZENEX AUTOMATION. Therefore, information contained in this manual may be updated from time-to-
time due to product improvements, etc., and may not conform in every respect to former issues.

User Manual For RS485-ZDM556C Stepper Drive
Office Add. : C-83, Zaveri Industrial Estate, Kathwada – Singarva Road, Kathwada, Ahmedabad-382430.
Email : [e-mail] ,Website : www.zenexautomation.net
Contact (M) : +91 – 9727764623 / +91 - 9978030413
Part 1:RS485-ST68D
Hardware Manual
1 Descriptions
RS485-ST68D is our latest standard RS485 Modbus hybrid servo driver, which adopts the latest 32-bit DSP digital
processing technology.The motor works with low heating ,extra smoothly, and low vibration and noise due to its
advanced vector control technology .The user can set any ID address within 1-255 and any current value under
the rated current to meet the applications. it can be matched with different of size motors(from Nema23-
Nema34) to applied for variable applications. the drive can auto-tuning for matching the motor when power up,
which can automatically generate optimal operating parameters for different motors to maximize the
performance of the motor.
2 Features
Serial Port And Auto Tune Function
Advanced vector control technology
Supportstandstill half current function
4 channels opto-coupler isolation OC output
5 channels opto-coupler isolation input,2 of them are high speed opto-coupler isolation input
1 channel analog output
Communication Frequency up to 1MHz(default is 9600HZ)
Current setting range 0.1-8A
Smooth movement and extra low noise
Quick response, no delay and zero settling time
No loss of steps; no hunting; no overshooting
3 Applications
For a variety of small and medium-sized automation equipment and instruments, such as: AGV, speed pass door,
engraving machine, marking machine, cutting machine, laser Phototypesetting, router machine,plotter,CNC
machine tools, automatic assembly equipment. The users canget special effect from small noise, highspeed
equipment application.

User Manual For RS485-ZDM556C Stepper Drive
Office Add. : C-83, Zaveri Industrial Estate, Kathwada – Singarva Road, Kathwada, Ahmedabad-382430.
Email : [e-mail] ,Website : www.zenexautomation.net
Contact (M) : +91 – 9727764623 / +91 - 9978030413
4 Specifications
4.1 Electrical Specifications
4.2 Operating Environment

User Manual For RS485-ZDM556C Stepper Drive
Office Add. : C-83, Zaveri Industrial Estate, Kathwada – Singarva Road, Kathwada, Ahmedabad-382430.
Email : [e-mail] ,Website : www.zenexautomation.net
Contact (M) : +91 – 9727764623 / +91 - 9978030413
5 Mechanical Specifications
※Recommend side installaon, beer cooling effect, when design installaon dimension, consider the terminal
size and wiring!
Enhance Cooling method
A:The driver's reliable operating temperature is usually within 60 , the motor operating temperature℃is within
80 ;℃
B: It is recommended touse the automatic half-flow mode, the current will be automatically reduced by half
when the motor stops, so as to reduce the heating of the motor and the drive;
C: When installing the driver, please use the vertical side installation, so that the cooling teethform a strong air
convection; when necessary, install a fan where is close to the drive, forced cooling to ensure thatthe drive is in
a reliable working temperature range
6 Connectors and Pin Assignment

User Manual For RS485-ZDM556C Stepper Drive
Office Add. : C-83, Zaveri Industrial Estate, Kathwada – Singarva Road, Kathwada, Ahmedabad-382430.
Email : [e-mail] ,Website : www.zenexautomation.net
Contact (M) : +91 – 9727764623 / +91 - 9978030413
The RS485-ST68D has four connectors, connector for i/o connections, connector for Encoder Feedback and hall
signal, connector for power and motor connection, and the RS485 Communication Port
6.1 Control signals connector

User Manual For RS485-ZDM556C Stepper Drive
Office Add. : C-83, Zaveri Industrial Estate, Kathwada – Singarva Road, Kathwada, Ahmedabad-382430.
Email : [e-mail] ,Website : www.zenexautomation.net
Contact (M) : +91 – 9727764623 / +91 - 9978030413
6.2 Encoder Feedback and hall signal Connector
6.3 Power and Motor
Power supply voltage between the provisions of the normal work, RS485 driver is best to use non-regulated DC
power supply, can also use the transformer step-down + bridge rectifier + capacitor filter. However, take care
that the peak value of the rectified voltage ripple does not exceed its maximum specified voltage. It is

User Manual For RS485-ZDM556C Stepper Drive
Office Add. : C-83, Zaveri Industrial Estate, Kathwada – Singarva Road, Kathwada, Ahmedabad-382430.
Email : [e-mail] ,Website : www.zenexautomation.net
Contact (M) : +91 – 9727764623 / +91 - 9978030413
recommended that users use DC voltage lower than the maximum voltage to supply power and avoid the
fluctuation of power grid beyond the working range of driver voltage.
If you are using a regulated switching power supply, beaware that the output current range of the switching
power supply needs to be maximized.
Please note!
A:When wiring, pay attention to the positive and negative poles of the power supply.
B:Better use non-regulated power supply;
C:When use a non-regulated power supply, the power supply current output capacity should be greater than
60% of the drive setting current;
D:The use of regulated switching power supply, the output currentof the power supply should begreater than
or equal to the working currentof the driver;
E:To reduce costs, two or three drives can share a power supply, but should ensure that the power supply is
large enough.

User Manual For RS485-ZDM556C Stepper Drive
Office Add. : C-83, Zaveri Industrial Estate, Kathwada – Singarva Road, Kathwada, Ahmedabad-382430.
Email : [e-mail] ,Website : www.zenexautomation.net
Contact (M) : +91 – 9727764623 / +91 - 9978030413
6.4 RS485 Communication Port
Two RJ45 terminals
Note: The cable connecting RS485-ST68D to PC must be a dedicated cable. Please check before use to avoid
damage.

User Manual For RS485-ZDM556C Stepper Drive
Office Add. : C-83, Zaveri Industrial Estate, Kathwada – Singarva Road, Kathwada, Ahmedabad-382430.
Email : [e-mail] ,Website : www.zenexautomation.net
Contact (M) : +91 – 9727764623 / +91 - 9978030413
7 DIP Switch Settings
7.1 RS485 ID Table
Note: The calculation formula of the ID of RS485 is as follows: ID =：ID=1*S1+2*S2+4*S3+8*S4+16*S5. The
default ID value is 0, 0indicates the broadcast address, you can set other addresses or higher address through
the master or other software.
7.2 RS485communication Baud-Rate Table
DIP
switch

User Manual For RS485-ZDM556C Stepper Drive
Office Add. : C-83, Zaveri Industrial Estate, Kathwada – Singarva Road, Kathwada, Ahmedabad-382430.
Email : [e-mail] ,Website : www.zenexautomation.net
Contact (M) : +91 – 9727764623 / +91 - 9978030413
7.3 SW8: The terminal resistor selection for RS485.
OFF=RS485 R off(default)
OFF=RS485 R on
8 Stepper Motors
RS485-ST68D can work with the following ZENEX AUTOMATION’s ECN series stepper motors:
8.1 Nema23motor
8.2 Nema24motor
8.3 Nema34motor

User Manual For RS485-ZDM556C Stepper Drive
Office Add. : C-83, Zaveri Industrial Estate, Kathwada – Singarva Road, Kathwada, Ahmedabad-382430.
Email : [e-mail] ,Website : www.zenexautomation.net
Contact (M) : +91 – 9727764623 / +91 - 9978030413
9 Wiring Diagrams
9.1 Interface

User Manual For RS485-ZDM556C Stepper Drive
Office Add. : C-83, Zaveri Industrial Estate, Kathwada – Singarva Road, Kathwada, Ahmedabad-382430.
Email : [e-mail] ,Website : www.zenexautomation.net
Contact (M) : +91 – 9727764623 / +91 - 9978030413
9.2 Diagram
10 Protection Indications
The green indicator turns on when power-up. When drive protection is activated, the red LED blinks periodicity
to indicate the error type.
A:Over current or phase Short circuit protection
When a short circuit occurs or the internal drive over-current, the drive RED Led flashes 1 time, and repeat
flashing within 3 seconds. At this point must discharge fault, re-power and reset.
B: Over-voltage protection
When input voltage is higher than 55V, the driver RED Led flashes twice, and flashes repeatedly within 3
seconds. At this point must discharge fault, re-power and reset.
△Note! Since the drive does not have the power supply reverse polarity protection function, therefore, before
power on, make sure the positive and negative power supply wiring is correct. Reverse polarity will lead to
burn the fuse in the drive!

User Manual For RS485-ZDM556C Stepper Drive
Office Add. : C-83, Zaveri Industrial Estate, Kathwada – Singarva Road, Kathwada, Ahmedabad-382430.
Email : [e-mail] ,Website : www.zenexautomation.net
Contact (M) : +91 – 9727764623 / +91 - 9978030413
11 Frequently Asked Questions
In the event that your drive doesn’t operate properly, the first step is to identify whether the problem is
electrical or mechanical in nature. The nextstep is to isolate the system component that is causing the
problem.As part of this process you may have to disconnect the individual components that make up your
system and verify that they operate independently. It is important to document each step in the troubleshooting
process. You may need this documentation to refer back to at a later date, and these details will greatly assist
our Technical Support staff in determining the problem should you need assistance.
Many of the problems that affect motion control systems can be traced to electrical noise, controller software
errors, or mistake in wiring.
Problem Symptoms and Possible Causes

User Manual For RS485-ZDM556C Stepper Drive
Office Add. : C-83, Zaveri Industrial Estate, Kathwada – Singarva Road, Kathwada, Ahmedabad-382430.
Email : [e-mail] ,Website : www.zenexautomation.net
Contact (M) : +91 – 9727764623 / +91 - 9978030413
12 Warranty
Shenzhen ZENEX AUTOMATION Co., Ltd. warrants its products against defects in materials and workmanship for
a
period of 12 months from shipment out of factory. During the warranty period, ZENEX AUTOMATION will either,
at its option, repair or replace products which proved to be defective.
Exclusions
The above warranty does not extend to any product damaged by reasons of improper or inadequate handlings
by customer, improper or inadequate customer wirings, unauthorized modification or misuse, or operation
beyond the electrical specifications of the product and/or operation beyond environmental specifications for the
product.
Obtaining Warranty Service
To obtain warranty service, a returned material authorization number (RMA) must be obtained from customer
service at e-mail: [e-mail] before returning product for service. Customer shall prepay
shipping charges for products returned to ZENEX AUTOMATION for warranty service, andZENEX AUTOMATION
shall pay for return of products to customer.
Warranty Limitations
ZENEX AUTOMATION makes no other warranty, either expressed or implied, with respectto the product. ZENEX
AUTOMATION specifically disclaims the implied warranties of merchantability and fitness for a particular
purpose. Some jurisdictions donot allow limitations on how long and implied warranty lasts, so the above
limitation or exclusion may notapply to you. However, any implied warranty of merchantability or fitness is
limited to the 12-month duration of this written warranty.

User Manual For RS485-ZDM556C Stepper Drive
Office Add. : C-83, Zaveri Industrial Estate, Kathwada – Singarva Road, Kathwada, Ahmedabad-382430.
Email : [e-mail] ,Website : www.zenexautomation.net
Contact (M) : +91 – 9727764623 / +91 - 9978030413
Part 2 :RS485-ST68D
RS485 Communication Protocol Specification
1 Network Layout
2 Communication function
Built-in ladder acceleration and deceleration curve generator,can use ladder acceleration and deceleration,
through the communication command to achieve fixed-length operation,continuous operation, deceleration
stop,stop immediate. Internal operation supports absolute position mode and relative position mode control,
built-in common zero function, simplify development. Internal pulse generator with 32-bit speed, acceleration,
travel, can achieve a wide range of trajectory.

User Manual For RS485-ZDM556C Stepper Drive
Office Add. : C-83, Zaveri Industrial Estate, Kathwada – Singarva Road, Kathwada, Ahmedabad-382430.
Email : [e-mail] ,Website : www.zenexautomation.net
Contact (M) : +91 – 9727764623 / +91 - 9978030413
2.1 Communication protocol
The Communication is the standardModbus protocol, supports 0x03 (register), 0x06 (write a single register),
0x10 (16) (write multiple registers). Serial port communication format: Baud rate 9600 ~ 115200, 8 data bits, no
parity verification, a stop bit.
2.2 Modbus Register Address Definition(drive parameter list)

User Manual For RS485-ZDM556C Stepper Drive
Office Add. : C-83, Zaveri Industrial Estate, Kathwada – Singarva Road, Kathwada, Ahmedabad-382430.
Email : [e-mail] ,Website : www.zenexautomation.net
Contact (M) : +91 – 9727764623 / +91 - 9978030413