aspar Mini Modbus 4DI Expansion Module User Manual

: June 9, 2024
: aspar

aspar Mini Modbus 4DI Expansion Module

Introduction

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 judgement 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

Purpose and description of the module

4DI Module is an innovative device that provides a simple and cost-effective extension of the number of lines of input in popular PLCs.
The module has 4 digital inputs with configurable timer/counter option, which
allow to connect two encoders. All inputs are isolated from the logic by optocouplers. Each channel can be individually configured in one of several modes.
his 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.

Technical Specifications

Power Supply	Voltage	10-38VDC; 20-28VAC
Maximum Current*	62 mA @ 12V / 35 mA @ 24V
Digital Inputs	No of inputs	4
Voltage range	0 – 36V
Low State „0”	0 – 3V
High State „1”	6 – 36V
Input impedance	4kΩ
Isolation	1500 Vrms
Input Type	PNP or NPN
Counters	No	4
Resolution	32 bits
Frequency	1kHz (max)
Impulse Width	500 μs (min)
Temperature	Work	-10 °C – +50°C
Storage	-40 °C – +85°C
Connectors	Power Supply	3 pin
Communication	3 pin
Inputs	2 x 3 pin
Configuration	Mini USB
Size	Height	90 mm
Length	56 mm
Width	17 mm
Interface	RS485	Up to 128 devices

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.

Communication configuration

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.

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.

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

Communication settings

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

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

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 MSB| 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

Indicators

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 on the input is high state.

Block diagram

Module Connection

input connection

Module Connection

Modules Registers

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
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
30051| 50| 0x32| Inputs| Read| Inputs state
40053| 52| 0x34| Counter 1 LSB| Read & Write| __

32-bit counter 1

40054| 53| 0x35| Counter 1 MSB| Read & Write
40055| 54| 0x36| Counter 2 LSB| Read & Write| 32-bit counter 2
40056| 55| 0x37| Counter 2 MSB| Read & Write
40057| 56| 0x38| Counter 3 LSB| Read & Write| 32-bit counter 3
40058| 57| 0x39| Counter 3 MSB| Read & Write
40059| 58| 0x3A| Counter 4 LSB| Read & Write| 32-bit counter 4
40060| 59| 0x3B| Counter 4 MSB| Read & Write
40061| 60| 0x3C| CCounter 1 LSB| Read & Write| 32-bit value of captured counter 1
40062| 61| 0x3D| CCounter 1 MSB| Read & Write
40063| 62| 0x3E| CCounter 2 LSB| Read & Write| 32-bit value of captured counter 2
40064| 63| 0x3F| CCounter 2 MSB| Read & Write
40065| 64| 0x40| CCounter 3 LSB| Read & Write| 32-bit value of captured counter 3
40066| 65| 0x41| CCounter 3 MSB| Read & Write
40067| 66| 0x42| CCounter 4 LSB| Read & Write| 32-bit value of captured counter 4
40068| 67| 0x43| CCounter 4 MSB| Read & Write
40069| 68| 0x44| Counter Config 1| Read & Write| Counter Configuration
+1 – time measurement (if 0 counting impulses)
+2 – autocatch counter every 1 sec
+4 – catch value when input low
+8 – reset counter after catch
+16 – reset counter if input low
+32 – encoder
40070| 69| 0x45| Counter Config 2| Read & Write
40071| 70| 0x46| Counter Config 3| Read & Write
40072| 71| 0x47| Counter Config 4| Read & Write
40073| 72| 0x48| Catch| Read & Write| Catch counter
40074| 73| 0x49| Status| Read & Write| Captured counter

Bit access

Modbus Address| Dec Address| Hex Address| Register name| Access| Description
---|---|---|---|---|---
10801| 800| 0x320| Input 1| Read| Input 1 state
10802| 801| 0x321| Input 2| Read| Input 2 state
10803| 802| 0x322| Input 3| Read| Input 3 state
10804| 803| 0x323| Input 4| Read| Input 4 state
1153| 1152| 0x480| Capture 1| Read & Write| Capture counter 1
1154| 1153| 0x481| Capture 2| Read & Write| Capture counter 2
1155| 1154| 0x482| Capture 3| Read & Write| Capture counter 3
1156| 1155| 0x483| Capture 4| Read & Write| Capture counter 4
1169| 1168| 0x490| Captured 1| Read & Write| Captured value of counter 1
1170| 1169| 0x491| Captured 2| Read & Write| Captured value of counter 2
1171| 1170| 0x492| Captured 3| Read & Write| Captured value of counter 3
1172| 1171| 0x493| Captured 4| Read & Write| Captured value of counter 4

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.
Configuration software

Configurator is a universal program, whereby it is possible to configure all available modules.
Configuration software

Customer Support

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

**