OneFex CS-IO1616 User manual

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CS-IO1616 User Manual
CS-IO1616
Modbus RTU I/O Module
Manual

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1PRODUCT INTRODUCTION..............................................................................................5
1.1 Features........................................................................................................................................ 5
1.2 Parameter..................................................................................................................................... 5
1.3 Item Selection.............................................................................................................................. 6
1.4 Dimension.................................................................................................................................... 6
2WIRING INSTRUCTIONS....................................................................................................7
2.1 Terminal Definition ..................................................................................................................... 7
2.2 Communication Wiring............................................................................................................... 7
2.3 DO Wiring..................................................................................................................................... 8
2.3.1 Low Load Wiring ....................................................................................................................................8
2.3.2 AC 220V Load Device Wiring .................................................................................................................8
2.3.3 AC 380V Load Device Wiring 【With Zero Line】.................................................................................9
2.3.4 AC 380V Load Device Wiring【Without Zero Line】............................................................................9
2.4 Digital Input Wiring................................................................................................................... 10
2.4.1 Active Signal Wiring.............................................................................................................................10
2.4.2 Passive Switch Value (Dry Contact) Wiring..........................................................................................10
3PARAMETERS AND WORKING MODE CONFIGURATION................................ 10
3.1 Device and PC Connection Settings ...................................................................................... 10
3.2 Device Address......................................................................................................................... 10
3.2.1 Introduction.........................................................................................................................................10
3.2.2 Device Communication Address Reading............................................................................................11
3.2.3 Offset Address Setting and Reading....................................................................................................12
3.2.4 Baud Rate Reading and Setting ...........................................................................................................12
3.3 Working Mode............................................................................................................................ 12
3.3.1 Normal Mode.......................................................................................................................................12
3.3.2 NOLock Linkage Mode.........................................................................................................................12
3.3.3 Lock Linkage Mode ..............................................................................................................................13
3.3.4 All Channel Lock Linkage Mode ...........................................................................................................13
3.3.5 2Device NOLock Linkage Mode ...........................................................................................................13
3.3.6 2Device Lock Linkage Mode.................................................................................................................14
3.3.7 Working Mode Configuration..............................................................................................................14
4DEVELOPMENT DATA INSTRUCTION...................................................................... 15
4.1 Communication Protocol Instruction..................................................................................... 15
4.2 Modbus Register Instruction................................................................................................... 15

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4.3 Command List ........................................................................................................................... 16
4.4 Command Details...................................................................................................................... 16
4.4.1 Control DO ...........................................................................................................................................16
4.4.2 Query DO Status ..................................................................................................................................17
4.4.3 Optocoupler Input ...............................................................................................................................17
4.4.4 Flash ON Flash OFF Command.............................................................................................................18
4.4.5 All ON and All OFF Command ..............................................................................................................19
4.4.6 Active Reporting Protocol....................................................................................................................19
5PRODUCT MAINTENANCE ............................................................................................ 20
5.1 Device Usage Environment ..................................................................................................... 20
5.2 FAQ............................................................................................................................................. 20
5.2.1 RS485 /RS232 communication, no response when device control.....................................................20
5.2.2 The relay can only be turned on but not turned off............................................................................21
5.2.3 485 interface cannot be used to establish communication and control After the relay powered on.
21
5.2.4 Multiple devices on the 485 bus and ON/OFF operation failed to send the broadcast address 254.21
5.2.5 PLC and the device cannot communicate normally ............................................................................22
5.2.6 How to restore the factory settings.....................................................................................................22
6AFTER-SALE SERVICE...................................................................................................22
6.1 Commitment .............................................................................................................................. 22
6.2 Disclaimer .................................................................................................................................. 23

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Notice
❖Please read this manual carefully before use and save it for reference.
❖Please follow to the operating procedures and precautions in this manual.
❖Please open the package carefully and check whether the device and
accessories have been damaged due to transportation when you receive the device.
Please contact us for return processing once damage occurs.
❖Please do not repair it yourself, and contact our technical support department
directly if the device fails.

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1 Product Introduction
CS-IO series products are Serial I/O module using standard Modbus-RTU protocol,
supporting RS485/232. Support wide voltage power supply, multi-channel input and
output control, which can be widely used in various application scenarios such as
industrial production, agriculture, smart city and office buildings.
1.1 Features
◆DC 9-28V wide voltage power supply, support anti-reverse connection;
◆16-way DO contact isolation, normally ON and normally OFF, 10A 250VAC /
10A 30VDC;
◆16-way DI, with optocoupler isolation, used for switch detection, supports dry
and wet contacts;
◆2*LED indication: 1 for power status,1 for work status; 16 for relay status;
◆SupportsRS485+RS232Communicationinterface,RS485powerisolationplussignal
isolation,reliablecommunication;
◆Communication baud rate: 300bps~38400bps (, It is 9600 by default and
can be modified by software);
◆Support standard Modbus RTU protocol, read and write by register address;
◆253 device addresses can be set. The 5-bit address DIP switch can set 1-31
address codes, and those greater than 31 can be set by software;
◆Support input and output linkage, such as local linkage or dual-computer
linkage, which is convenient for multi-terminal control;
◆Support debugging software for setting parameters and IO control;
◆Support software and hardware customization. Contact Us for details.
1.2 Parameter
Paremater
Contact capacity
10A/30VDC
10A/250VAC
Durability
100,000 times (Electrical）
10,000,000 times (Mechanical)
Data interface
RS485
Rated voltage
DC 9-28V
Power indication
1 LED (power, always on)
1 LED (working: flashing)
Output indication
16 LEDs (relay on and off)
Working temperature
-40℃～85℃, Industrial Grade
Size
200*110*60mm
Weight
330g
Default communication format
9600,n,8,1
Baud rate
300~38400bps

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Functions
Flash ON Flash OFF
All ON All OFF
NOLock Linkage
Lock Linkage
All Channel Lock Linkage
2Device NOLock Linkage
2Device Lock Linkage
Software support
Working mode change
DO independent control
DI status query
Overall DO control;
Debugging information query;
Support various configuration software;
support Labview, etc.
Installation
35mm Din Rail Mounting / Screw Holes
1.3 Item Selection
Item #
DO
DI
Analog
RS485
Address Dial
CS-IO101
1
1
0
RS485 * 1
Address Dial
CS-IO204
2
4
0
RS485 * 1
Address Dial
CS-IO222A
2
2
2(0-20mA)
RS485 * 1
Address Dial
CS-IO404A
4
0
4(0-20mA)
RS485 * 1
Address Dial
CS-IO404
4
4
0
RS485 * 1
Address Dial
CS-IO606
6
6
0
RS485 * 1
Address Dial
CS-IO808
8
8
0
RS485 + RS232
CS-IO1600DI
0
16
0
RS485 + RS232
Address Dial
CS-IO1600
16
0
0
RS485 + RS232
Address Dial
CS-IO3200
32
0
0
RS485 + RS232
Address Dial
CS-IO1616
16
16
0
RS485 + RS232
Address Dial
1.4 Dimension
200*110*60mm

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2 Wiring Instructions
2.1 Terminal Definition
2.2 Communication Wiring
By default, its address is 1, The host computer software can use the
default address 1 to communicate with the device (or broadcast address 254,
which is only applicable when one device is mounted on the network).
RS485 Wiring

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2.3 DO Wiring
The relay is a normally open terminal, each channel has 2 terminals,
2.3.1 Low Load Wiring
Applicable for non-resistive load current< 3A or resistive load current < 5A
2.3.2 AC 220V Load Device Wiring

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2.3.3 AC 380V Load Device Wiring 【With Zero Line】
2.3.4 AC 380V Load Device Wiring【Without Zero Line】
Please add an AC contactor/intermediate relay between this device and the load in
the following four cases:
1. Load rated voltage>30VDC
2. Load rated voltage>250VAC
3. Non-Resistive Load Current>3A
4. Resistive load current>5A

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2.4 Digital Input Wiring
There are 16 switching value acquisition ports in total. The DI terminal is connected
to V+ to trigger a valid signal. Please ensure that the voltage is >=5V.
1. Left floating DI terminal or given 0 voltage, and the data point reads 0.
2. Connect DI terminal to V+, or a positive voltage >= 5V, and the data point reads 1.
2.4.1 Active Signal Wiring
Suitable for measuring signals with voltage, such as level and pulse output.
2.4.2 Passive Switch Value (Dry Contact) Wiring
It is suitable for passive contact signal, such as various switches, buttons, etc.
3 Parameters and Working Mode Configuration
3.1 Device and PC Connection Settings
The USB end of the USB to RS485 converter is directly connected to the USB port of
computer, and 485 end is wired according to the wiring method in "Chapter 2.2
Communication Wiring".
Serial port number query method: Open "My Computer - Device Manager - Port (COM
and LPT)" and the COM number that appears after the USB to 485 device is inserted is the
serial port number.
3.2 Device Address
3.2.1 Introduction
The Offset Address of this device is 1 by default, and the broadcast address is
254 to communicate, but 0 cannot be used.

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5-bit DIP switch
Communication address = Hardware address (dip switch address) + Offset
address.
The device’s Factory default settings of communication address is 1.
With DIP switch, users can quickly modify the device address.
（1）The address is "31" when all 5 dial codes are dialed above;
（2）The address is "0" When all t5 dial codes are dialed below;
（3）The leftmost 1 is the lowest digit in binary;；
（4）DIP address table:
3.2.2 Device Communication Address Reading
After the device connected normally, the I/O module debugging software read
the current address 254 [only support broadcast read address when there is one
device on the bus].

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3.2.3 Offset Address Setting and Reading
Click "Read" or "Set" to read or set the Offset Address of the device (address
parameters stored in the device).
3.2.4 Baud Rate Reading and Setting
Click "Read" and "Set" to read and set the baud rate and address respectively,
which will take effect immediately after the operation.
3.3 Working Mode
3.3.1 Normal Mode
The relay takes corresponding actions after ON or OFF command.
3.3.2 NOLock Linkage Mode
It is a board module with optocoupler input and DO. In this mode, the input
optocoupler and the relay are directly linked.
The optocoupler input signal takes effect -> the corresponding relay is pulled in,
The optocoupler input signal is canceled -> the corresponding relay is
disconnected.
In this mode, due to mechanical and program delay, there will be a certain delay

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between the optocoupler input signal and the relay action, but the maximum will not
exceed 0.05 seconds.
In this mode, all relays are directly linked by the optocoupler, so the serial port
cannot operate the relay. This is not an abnormal phenomenon, but after the serial
port operates the relay, it is linked by the optocoupler state before the relay is still in
action.
3.3.3 Lock Linkage Mode
In this mode, each time the optocoupler inputs a signal, the corresponding relay
is flipped once.
The optocoupler input signal takes effect -> the relay flips (the pull-in changes to
disconnect, the disconnect changes to pull-in)；
The optocoupler input signal is canceled -> the relay does not act；
This mode also has the delay problem of unlocked mode, but the delay time is
also not greater than 0.05 seconds. This mode can be mainly used for external
signal triggering to control the start and stop of the device. For example, an
optocoupler is connected to a button, and the corresponding relay is connected to
an electrical device. Each time the button is pressed, the device will switch to a start-
stop state.
3.3.4 All Channel Lock Linkage Mode
The module itself has a board module with optocoupler input and DO. In this
mode, each time the optocoupler inputs a signal, the corresponding relay will be
pulled in, and relays of the other optocouplers will be disconnected if no signal is
input.
The optocoupler input signal takes effect -> the corresponding relay is pulled in
and other relays are disconnected;
The optocoupler input signal is canceled -> the relay does not act;
This mode also has a delay problem, but the delay time is also not greater than
0.05 seconds. This mode can be mainly used for external signal triggering to control
the start and stop of different devices, such as
The multi-channel optocoupler is not connected to a button, and the
corresponding relay is connected to an electrical device. If you press a button, the
corresponding device will switch to the start state, and other devices will stop
running.
3.3.5 2Device NOLock Linkage Mode
This mode requires two devices with the same address and mode to complete.
After the two devices are connected through direct connection 485 or cross 232, the
optocoupler state of module 1 will directly control the state of the corresponding
relay of module 2.
No. 1 optocoupler input signal of module 1 is valid—> No. 1 relay of module 2 is
OFF
No. 1 optocoupler input signal of module 1 disappears -> No. 1 relay of module

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2 is disconnected
The relay response delay time in this mode is longer than the previous modes,
but not more than 0.1 second (9600 baud rate).
In this mode, if the 485 bus is used, multiple devices can be connected in
parallel, and the addresses of the devices match each other, so that the remote
switch value can be transmitted. For example, if there are multiple low-speed
switches on site that need to be transmitted to the control room 500 meters away to
control the alarm lights or bells, it is only necessary to arrange a few modules in the
workshop and connect them to the corresponding modules in the machine room
through two twisted-pair shielded cables. can complete this task. In the same way,
the button signal of the computer room operation can also be directly transmitted to
the relay located in the computer room module.
3.3.6 2Device Lock Linkage Mode
This mode requires two devices with the same address and mode to complete.
After the two devices are connected through direct connection 485 or cross 232, the
optocoupler state of module 1 will take effect and the state of the corresponding
relay of control module 2 will be reversed.
No. 1 optocoupler input signal of module 1 is valid—> No. 1 relay of module 2 is
flipped
No. 1 optocoupler input signal of module 1 disappears -> No. 1 relay of module
2 does not act
The application of this mode is similar to the "2Device NOLock Linkage" mode,
but it is more suitable for the start and stop of remote-control equipment. Just install
a button on the operation end to realize the action of pressing once to start and
pressing once to stop.
3.3.7 Working Mode Configuration
After the device communicates normally, select the corresponding working
mode setting in the software working mode part, as shown in the following figure:

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4 Development Data Instruction
4.1 Communication Protocol Instruction
This product supports standard Modbus commands. For detailed command
generation and parsing methods, you can refer to "MODBUS Protocol English
Version" based on the register table in this article.
This product supports Modbus RTU format.
4.2 Modbus Register Instruction
Register address table:
Script code
Meaning
01
Read coil register [DO]
02
Read discrete input [DI]
03
Read parameter register (use 06 to write parameters)
05
Write a single coil
15(0x0F)
Write multiple coils
Parameters Configuration
Communication
baud rate
Read register
function code 03
Write register
function code 06
03E8H
See the baud rate value
correspondence table below. The
default is 0 and supports 0-5. This
register determines the
communication baud rate of RS232
and RS485 at the same time.
Spare
03E9H
Spare,the user cannot write any
value.
Offset address
03EAH
Communication address=software
address+DIP switch address
Working Code
03EBH
Working mode storage
Spare
03ECH
Spare
（1）The Modbus device command supports the following Modbus addresses:
00001 to 09999 are discrete outputs (coils)
10001 to 19999 are discrete inputs (contacts)
30001 to 39999 are input registers (usually analog inputs)
40001 to 49999 are holding registers (usually store device configuration information)
In 5-bit code format, the first character determines register type, and the remaining 4
characters represent address.
Address 1 starts from 0, such as 00001 corresponds to 0000.
（2）Baud rate value corresponding table

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（3）
00001 address to query DO status and control;
10002 address to query DI status;
The register address is in accordance with the PLC naming rules, the real address is
to remove the highest bit, and then subtract 1
4.3 Command List
Scene
RTU format (send in hexadecimal)
Query 16 DOs ‘status
FE 01 00 00 00 10 29 C9
Return query command information
FE 01 02 FF FF AC 58
Query 16DIs’status
FE 02 00 00 00 10 6D C9
Return control information
FE 02 02 00 00 AD AC
Control the 1st DO on
FE 05 00 00 FF 00 98 35
Return control information
FE 05 00 00 FF 00 98 35
Control the 1st DO off
FE 05 00 00 00 00 D9 C5
Return control information
FE 05 00 00 00 00 D9 C5
Control the 2nd DO on
FE 05 00 01 FF 00 C9 F5
Control the 2nd DO off
FE 05 00 01 00 00 88 05
4.4 Command Details
4.4.1 Control DO
Control 1 DO (take the 1st DO ON as an example, other channels refer to this)
Tx:014-FE 0F 00 00 00 01 01 01 A0 53
Rx:015-FE 0F 00 00 00 01 80 04
Tx:029-FE 05 00 00 FF 00 98 35
Rx:030-FE 05 00 00 FF 00 98 35
Value
Baud rate
0
9600
1
2400
2
4800
3
9600
4
19200
5
38400

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Field
Meaning
Note
FE
Device address
It is the broadcast address
05
05 command
Single control command
00 00
Address
Register address of the DO to control
FF 00
Command
Relay ON action
98 35
CRC16
CRC16 checksum of the first 6 bytes of data
4.4.2 Query DO Status
Query 16Dos’status
Tx:000-FE 01 00 00 00 10 29 C9
Rx:001-FE 01 02 00 00 AD E8
Field
Meaning
Note
FE
Device address
It is the broadcast address
01
01 command
Query DO status command
00 00
Starting address
Register address of the first DO to be queried
00 10
Number of queries
The number of the DOs to be queried
29 C9
CRC16
CRC16 checksum of the first 6 bytes of data
Field
Meaning
Note
FE
Device address
01
01 command
Return command: If the query is wrong, return 0x81
02
Number of bytes
All bytes of return status information. 1+(n-1)/8
00 00
Status of the query
Returned relay status.
Bit0: first relay status
Bit1: second relay status
. . . . . . .
Bit7: The eighth relay status
AD E8
CRC16
CRC16 checksum of the first 6 bytes of data
4.4.3 Optocoupler Input
Query 16DIs’ status
Tx:053-FE 02 00 00 00 10 6D C9
Rx:054-FE 02 02 00 00 AD AC
Field
Meaning
Note
FE
Device address
It is the broadcast address
02
02 command
Query DI (optocoupler input) status command
00 00
Starting address
Register address of the first optocoupler to be
queried

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00 10
Number of queries
Number of optocoupler status to be queried
6D C9
CRC16
CRC16 checksum of the first 6 bytes of data
Field
Meaning
Note
FE
Device address
02
02 command
Return command: If the query is wrong, return
0x81
02
Number of bytes
All bytes of return status information. 1+(n-1)/8
00 00
Status of the query
Return the state of the optocoupler.
Bit0: Status of the first optocoupler
Bit1: Status of the second optocoupler
. . . . . . .
Bit7: Status of the 8th optocoupler
AD AC
CRC16
CRC16 checksum of the first 6 bytes of data
4.4.4 Flash ON Flash OFF Command
Field
Meaning
Note
FE
Device address
10
10 Command
Query input register command
00 03
DO address
The address to be controlled
00 02
Number of control
commands
The number of commands to the relay
04
Bytes
The total number of bytes of the control
message command. 1+(n-1)/8
00 04 / 00 02
Command
00 04: flash OFF command
00 02: flash ON command
00 0A
Interval time
00 0A is 10 (hexadecimal converted to decimal)
The interval time is (0.1 seconds*10)
00 D8
CRC16
Check method
Return code：FE 10 00 03 00 02 A5 C7
Field
Meaning
Note
FE
Device address
10
10 command
Return instruction：If the query is
wrong, return 0x82
00 03
Device address
Query the address of the device
00 02
Number of commands
accepted
The number of commands accepted by
the device
A5 C7
CRC16
check digit

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4.4.5 All ON and All OFF Command
Tx:047-FE 0F 00 00 00 10 02 FF FF A6 64
Rx:048-FE 0F 00 00 00 10 40 08
Field
Meaning
Note
FE
Device address
0F
0F command
Return command: If the query
is wrong, return 0x82
00 00
Starting address
00 10
Number of Controls
Number of DOs Controlled
02
Bytes
Bytes of Send command
FF FF
ALL ON/ALL OFF command
FF: All ON command
00: All OFF command
A6 64
CRC16
Check digit
Field
Meaning
Note
FE
Device
address
0F
Off
command
Return command: If the query is
wrong, return 0x8F
00 00
Starting
address
00 10
Quantity
Number of relays returning
information
40 08
CRC16
Check digit
4.4.6 Active Reporting Protocol
This function is a non-standard Modbus protocol, which can only be used in dual-
computer mode, and is suitable for the serial relay to actively report changed switch
value
Filed
Meaning
Note
0x40 0x57
Header
0x01
Device Address
0x02
IO status lower 8 bits
0x00
IO status high 8 bits
0x42+0x01+0x02+0x00
Check Digit
0x42+deviceaddress+IO status
low 8 bits + IO status high 8 bits

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5 Product Maintenance
5.1 Device Usage Environment
1. The working voltage is 9~28V. If the input voltage is too high or too low, the
device may not work normally or even be damaged.
2. The DI input terminal adopts optocoupler isolation protection, and its bearing
voltage is 5~24V.
3. Do not overload for the DO output terminals. Please connect them correctly
within the allowable range (refer to the wiring diagram for details).
4. The allowable air humidity of the device is 5~85%RH, and it does not have
waterproof capability. Do not use it in condensation or liquid immersion
environments.
5. The relay is a component with a certain service life. When the theoretical service
life is reached, please replace it in time to avoid danger.
5.2 FAQ
5.2.1 RS485 /RS232 communication, no response when device
control
Confirm whether the communication speed, communication address, and
wiring are correct.
You can use the broadcast address 254 to try to communicate with unknown
addresses;
Confirm whether the serial port number on the software is correct;
Check whether the power supply and work indicator are normal;
For the RS232 version, please correctly identify the RS232 serial port module
used as male or female.
The module TXD is connected to RX pin of the relay
The module RXD is connected to TX pin of the relay
The module GND is connected to GND pin of the relay