Aspar Mini Modbus 4DI User manual

Mini Modbus 4DI
Expansion Module – 4 digital inputs
Version 1.2 User Manual
Manufactured for

Mini Modbus 4DI
User Manual
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.
WAR I G!
Failure to follow instructions can result in equipment damage or impede
the use of the hardware or software.
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1. 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
2. Module Features
2.1. 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.
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 DI rail in accordance with
DI E 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.
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2.2. Technical Specifications
Power upply 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 -20 °C - +65°C
Storage -40 °C - +85°C
Connectors
Power Supply 3 pin
Communication 3 pin
Inputs 2 x 3 pin
Configuration Mini USB
ize
Height 90 mm
Length 56 mm
Width 17 mm
Interface RS485 Up to 128 devices
* Maximum current with active Modbus transmission and high state on all inputs
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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 DI industry standard.
3. 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 bi-
directional. In the case of an RS485 twisted pair cable this termination is typically
120 Ω.
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90
17 56
50
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3.3. Types of odbus 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
top bits 1
Reply Delay [ms] 0
Modbus Type RTU
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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 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
4. Indicators
Indicator Description
O 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.
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5. Bloc diagram
6. Module Connection
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IN1
IN2
μC
R 485
VCC
GND
GND
485-
485+
COM1
IN3
IN4
COM2

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User Manual
7. 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
40033 32 0x20 Received packets MSB Read & Write No of received packets
40034 33 0x21 Received packets LSB Read & Write
40035 34 0x22 Incorrect packets MSB Read & Write No of received packets with error
40036 35 0x23 Incorrect packets LSB Read & Write
40037 36 0x24 Sent packets MSB Read & Write No of sent packets
40038 37 0x25 Sent packets LSB Read & Write
30051 50 0x32 Inputs Read Inputs state
40053 52 0x34 Counter 1 MSB Read & Write 32-bit counter 1
40054 53 0x35 Counter 1 LSB Read & Write
40055 54 0x36 Counter 2 MSB Read & Write 32-bit counter 2
40056 55 0x37 Counter 2 LSB Read & Write
40057 56 0x38 Counter 3 MSB Read & Write 32-bit counter 3
40058 57 0x39 Counter 3 LSB Read & Write
40059 58 0x3A Counter 4 MSB Read & Write 32-bit counter 4
40060 59 0x3B Counter 4 LSB Read & Write
40061 60 0x3C CCounter 1 MSB Read & Write 32-bit value of captured counter 1
40062 61 0x3D CCounter 1 LSB Read & Write
40063 62 0x3E CCounter 2 MSB Read & Write 32-bit value of captured counter 2
40064 63 0x3F CCounter 2 LSB Read & Write
40065 64 0x40 CCounter 3 MSB Read & Write 32-bit value of captured counter 3
40066 65 0x41 CCounter 3 LSB Read & Write
40067 66 0x42 CCounter 4 MSB Read & Write 32-bit value of captured counter 4
40068 67 0x43 CCounter 4 LSB 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
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7.2. 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
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