aspar Mini Modbus 4DO Expansion Module 4 Digital Outputs User Manual

June 9, 2024
aspar

Manufactured for
Mini Modbus 4DO Expansion Module 4 Digital Outputs

User Manualaspar Mini Modbus 4DO Expansion Module 4 Digital Outputs -
fig 7 Mini Modbus 4DO
Expansion Module – 4 digital outputs
Version 1.5

Mini Modbus 4DO Expansion Module 4 Digital Outputs

Thank you for choosing our product.
This manual will help you with proper support and proper operation of the device.
The information contained in this manual have been prepared with utmost care by our professionals and serve as a description of the product without incurring any liability  for the purposes of commercial law.
This information does not release you from the obligation of own judgment and verification.
We reserve the right to change product specifications without notice.
Please read the instructions carefully and follow the recommendations contained therein.
WARNING!
Failure to follow instructions can result in equipment damage or impede the use of the hardware or software.

Safety rules

  • Before first use, refer to this manual
  • Before first use, make sure that all cables are connected properly
  • Please ensure proper working conditions, according to the device specifications (eg: supply voltage, temperature, maximum power consumption)
  • Before making any modifications to wiring connections, turn off the power supply

Module Features

2.1. Purpose and description of the module
4DO Module is an innovative device that provides a simple and cost-effective extension of the number of outputs in popular PLCs.
This module is connected to the RS485 bus with twisted-pair wire.
Communication is via MODBUS RTU or MODBUS ASCII. The use of 32-bit ARM core processor provides fast processing and quick communication. The baud rate is configurable from 2400 to 115200.
The module is designed for mounting on a DIN rail in accordance with DIN EN 5002.
The module is equipped with a set of LEDs used to indicate the status of inputs and outputs useful for diagnostic purposes and helping to find errors.
Module configuration is done via USB by using a dedicated computer program.
You can also change the parameters using the MODBUS protocol.
2.2. Technical Specifications

Power Supply Voltage 10-38VDC; 20-28VAC
Maximum Current* 69 mA @ 12V / 38 mA @ 24V
Digital Outputs No of outputs 4
Max Voltage 55V
Max current 250mA
Output Type PNP
Temperature Work -10 °C – +50°C
Storage -40 °C – +85°C
Connectors Power Supply 3 pin
Communication 3 pin
Outputs 2 x 3 pin
Configuration Mini USB
Size Height 90 mm
Length 56 mm
Width 17 mm
Interface RS485 Up to 128 devices

2.3. Dimensions of the product
Look and dimensions of the module are shown below. The module is mounted directly to the rail in the DIN industry standard.
aspar Mini Modbus 4DO Expansion Module 4 Digital Outputs - fig
1

Communication configuration

3.1. Grounding and shielding
In most cases, IO modules will be installed in an enclosure along with other devices which generate electromagnetic radiation. Examples of these devices are relays and contactors, transformers, motor controllers etc. This electromagnetic radiation can induce electrical noise into both power and signal lines, as well as direct radiation into the module causing negative effects on the system. Appropriate grounding, shielding and other protective steps should be taken at the installation stage to prevent these effects. These protective steps include control cabinet grounding, module grounding, cable shield grounding, protective elements for electromagnetic switching devices, correct wiring as well as consideration of cable types and their cross sections.
3.2. Network Termination
Transmission line effects often present a problem on data communication networks. These problems include reflections and signal attenuation. To eliminate the presence of reflections from the end of the cable, the cable must be terminated at both ends with a resistor across the line equal to its characteristic impedance. Both ends must be terminated since the direction of propagation is bidirectional. In the case of an RS485 twisted pair cable this termination is typically 120 Ω.
3.3. Types of Modbus Registers
There are 4 types of variables available in the module

Type| Beginning address| Variable| Access|

Modbus Command

---|---|---|---|---
1| 00001| Digital Outputs| Bit Read & Write| 1, 5, 15
2| 10001| Digital Inputs| Bit Read| 2
3| 30001| Input Registers| Registered Read| 3
4| 40001| Output Registers| Registered Read & Write| 4, 6, 16

3.4. Communication settings
The data stored in the modules memory are in 16-bit registers. Access to registers is via MODBUS RTU or MODBUS ASCII.
3.4.1. Default settings

Parameter Name Value
Address 1
Baud rate 19200
Parity No
Data bits 8
Stop bits 1
Reply Delay [ms] 0
Modbus Type RTU

3.4.2. Configuration registers

Modbus Dec Hex Name Values

Address
40003| 2| 0x02| Baud rate| 0 – 2400
1 – 4800
2 – 9600
3 – 19200
4 – 38400
5 – 57600
6 – 115200
other – value * 10
40005| 4| 0x04| Parity| 0  – none
1  – odd
2  – even
3  – always 1
4  – always 0
40004| 3| 0x03| Stop Bits LSB| 1 – one stop bit
2 – two stop bits
40004| 3| 0x03| Data Bits MS| 7  – 7 data bits
8  – 8 data bits
40006| 5| 0x05| Response delay| Time in ms
40007| 6| 0x06| Modbus Mode| 0  – RTU
1  – ASCII

3.4.3. Watchdog function
This 16-bit register specifies the time in milliseconds to watchdog reset. If module does not receive any valid message within that time, all Digital and Analog Outputs will be
set to the default state.
This feature is useful if there is an interruption in data transmission and for security reasons. Output states must be set to the appropriate state in order to assure the safety
of persons or property.
The default value is 0 milliseconds which means the watchdog function is disabled.
Range: 0-65535 ms

Indicators

aspar Mini Modbus 4DO Expansion Module 4 Digital Outputs - fig
2

Indicator

|

Description

---|---
ON| LED indicates that the module is correctly powered.
TX| The LED lights up when the unit received the correct packet and sends the answer.
1, 2, 3, 4| LED indicates that the output is on.

Block diagram

aspar Mini Modbus 4DO Expansion Module 4 Digital Outputs - fig
3

Module Connection

aspar Mini Modbus 4DO Expansion Module 4 Digital Outputs - fig
4

Modules Registers

7.1. Registered access

Modbus| Dec| Hex| Register Name| Access|

Description

---|---|---|---|---|---
30001| 0| 0x00| Version/Type| Read| Version and Type of the device
30002| 1| 0x01| Address| Read| Module address
40003| 2| 0x02| Baud rate| Read & Write| RS485 baud rate
40004| 3| 0x03| Stop Bits & Data Bits| Read & Write| No of Stop bits & Data Bits (see 3.4.2)
40005| 4| 0x04| Parity| Read & Write| Parity bit
40006| 5| 0x05| Response Delay| Read & Write| Response delay in ms
40007| 6| 0x06| Modbus Mode| Read & Write| Modbus Mode (ASCII or RTU)
40009| 8| 0x08| Watchdog| Read & Write| Watchdog
40013| 12| 0x0C| Default Output State| Read & Write| Default output state (after power on or watchdog reset)
40033| 32| 0x20| Received packets LSB| Read & Write| No of received packets
40034| 33| 0x21| Received packets MSB| Read & Write
40035| 34| 0x22| Incorrect packets LSB| Read & Write| No of received packets with error
40036| 35| 0x23| Incorrect packets MSB| Read & Write
40037| 36| 0x24| Sent packets LSB| Read & Write| No of sent packets
40038| 37| 0x25| Sent packets MSB| Read & Write
40052| 51| 0x33| Outputs| Read & Write| Output state

7.2. Bit access

Modbus Address

| Dec Address| Hex Address| Register name| Access|

Description

---|---|---|---|---|---
193| 192| 0x0C0| Default state of output 1| Read & Write| Default state of output 1
194| 193| 0x0C1| Default state of output 2| Read & Write| Default state of output 2
195| 194| 0x0C2| Default state of output 3| Read & Write| Default state of output 3
196| 195| 0x0C3| Default state of output 4| Read & Write| Default state of output 4
817| 816| 0x330| Output 1| Read & Write| Output 1 state
818| 817| 0x331| Output 2| Read & Write| Output 2 state
819| 818| 0x332| Output 3| Read & Write| Output 3 state
820| 819| 0x333| Output 4| Read & Write| Output 4 state

Configuration software

Modbus Configurator is software that is designed to set the module registers responsible for communication over Modbus network as well as to read and write the current value of other registers of the module. This program can be a convenient way to test the system as well as to observe real-time changes in the registers. Communication with the module is done via the USB cable. The module does not require any drivers.   aspar Mini Modbus 4DO Expansion
Module 4 Digital Outputs - fig 5Configurator is a universal program, whereby it is possible to configure all available modules.aspar Mini Modbus 4DO Expansion Module 4
Digital Outputs - fig 6

Manufactured for:
Aspar s.c.
ul. Oliwska 112
80-209 Chwaszczyno
Poland
ampero@ampero.eu
www.ampero.eu
Tel. +48 58 351 39 89; +48 58 732 71 73

References

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