Aspar RS485 MODBUS User manual

RS485 MODBUS Module 8I8O
Expansion Module – 8 digital inputs, 8 digital outputs
Version 2 4 User Manual
Manufactured for

RS485 MODBUS Module 8I8O
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 judgment 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.
Expansion Module– 8 digital inputs, 8 digital outputs
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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
8I8O Module is an innovative device that provides a simple and cost-effective
extension of the number of lines of input and output in popular PLCs.
The module has 8 digital inputs with configurable timer/counter option and 8
digital outputs. In addition, terminals I 1 and I 2 and I 3 and I 4 can be used to
connect two encoders. All inputs and outputs are isolated from the logic of using
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 Supply Voltage 10-38VDC; 10-28VAC
Maximum Current 200 mA @ 12V / 100 mA @ 24V
Digital Inputs
No of inputs 8
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
Digital Outputs
No of outputs 8
Max Voltage 30V
Max current 500mA
Output Type PNP
Output protection 4A polymer fuse
Counters
No 8
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 2 pin
Communication 3 pin
Inputs 10 pin
Outputs 10 pin
Quick connector IDC10
Configuration Mini USB
Size
Height 120 mm
Length 101 mm
Width 22,5 mm
Interface RS485 Up to 128 devices
* Maximum current with active Modbus transmission, all outputs on 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. Power connectors, communication and
IOs are at the bottom and top of the module. USB connector configuration and
indicators located on the front of the module.
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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.
3.3. Setting Module ddress in RS485 Modbus Network
The following table shows how to set switch to determine the address of the
module. The module address is set with the switches in the range of 0 to 31. Addresses
From 32 to 255 can by set via RS485 or USB.
Adr SW5 SW4 SW3 SW2 SW1
0 OFF OFF OFF OFF OFF
1 OFF OFF OFF OFF ON
2 OFF OFF OFF ON OFF
3 OFF OFF OFF ON ON
4 OFF OFF ON OFF OFF
5 OFF OFF ON OFF ON
6 OFF OFF ON ON OFF
7 OFF OFF ON ON ON
8 OFF ON OFF OFF OFF
9 OFF ON OFF OFF ON
10 OFF ON OFF ON OFF
Adr SW5 SW4 SW3 SW2 SW1
11 OFF ON OFF ON ON
12 OFF ON ON OFF OFF
13 OFF ON ON OFF ON
14 OFF ON ON ON OFF
15 OFF ON ON ON ON
16 ON OFF OFF OFF OFF
17 ON OFF OFF OFF ON
18 ON OFF OFF ON OFF
19 ON OFF OFF ON ON
20 ON OFF ON OFF OFF
21 ON OFF ON OFF ON
Adr SW5 SW4 SW3 SW2 SW1
22 ON OFF ON ON OFF
23 ON OFF ON ON ON
24 ON ON OFF OFF OFF
25 ON ON OFF OFF ON
26 ON ON OFF ON OFF
27 ON ON OFF ON ON
28 ON ON ON OFF OFF
29 ON ON ON OFF ON
30 ON ON ON ON OFF
31 ON ON ON ON ON
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3.4. 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
3.5. Communication settings
The data stored in the modules memory are in 16-bit registers. Access to
registers is via MODBUS RTU or MODBUS ASCII.
3.5.1. Default settings
You can restore the default configuration by the switch SW6 (see 3.5.2 - Restore
the default configuration)
Baud rate 19200
Parity No
Data bits 8
Stop bits 1
Reply Delay [ms] 0
Modbus Type RTU
3.5.2. Restore the default configuration
To restore the default configuration:
•turn off the power
•turn on the switch SW6
•turn on the power
•when power and communication LED flash turn off the switch SW6
Caution! After restoring the default configuration all values stored in the registers will
be cleared as well.
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3.5.3. 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
3.5.4. atchdog 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
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4. Indicators
Indicator Description
Power supply LED indicates that the module is correctly powered.
Communication The LED lights up when the unit received the correct packet and sends the answer.
Inputs state LED indicates that on the input is high state.
Outputs state LED indicates that the output is on.
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Outputs state 1 – 8
Power Supply
Communication
Inputs State 1 – 8

RS485 MODBUS Module 8I8O
User Manual
5. Module Connection
5.1. Digital inputs
Sink input, PNP Source input, NPN Connection of encoder
5.2. Digital outputs
Source output, PNP Connection of relay
5.3. Communication, power supply
Communication Power supply, DC Voltage
24VDC
Power supply, AC Voltage
24VAC
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User Manual
6. Switches
Switch Function Description
1 Module address +1
Setting module address from 0 to 31
2 Module address +2
3 Module address +4
4 Module address +8
5 Module address +16
6 Restoring default settings
Restoring default settings
(see 3.5.1 - Default settings and 3.5.2 - Restore the
default configuration).
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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 Switches Read Switches state
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 3.5.3)
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)
40018 17 0x11 Inputs filter Read & Write Configuration of the inputs filter
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
40052 51 0x33 Outputs Read & Write Output 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 Counter 5 LSB Read & Write 32-bit counter 5
40062 61 0x3D Counter 5 MSB Read & Write
40063 62 0x3E Counter 6 LSB Read & Write 32-bit counter 6
40064 63 0x3F Counter 6 MSB Read & Write
40065 64 0x40 Counter 7 LSB Read & Write 32-bit counter 7
40066 65 0x41 Counter 7 MSB Read & Write
40067 66 0x42 Counter 8 LSB Read & Write 32-bit counter 8
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RS485 MODBUS Module 8I8O
User Manual
Modbus Dec Hex Register Name Access Description
40068 67 0x43 Counter 8 MSB Read & Write
40085 84 0x54 CCounter 1 LSB Read & Write 32-bit value of captured counter 1
40086 85 0x55 CCounter 1 MSB Read & Write
40087 86 0x56 CCounter 2 LSB Read & Write 32-bit value of captured counter 2
40088 87 0x57 CCounter 2 MSB Read & Write
40089 88 0x58 CCounter 3 LSB Read & Write 32-bit value of captured counter 3
40090 89 0x59 CCounter 3 MSB Read & Write
40091 90 0x5A CCounter 4 LSB Read & Write 32-bit value of captured counter 4
40092 91 0x5B CCounter 4 MSB Read & Write
40093 92 0x5C CCounter 5 LSB Read & Write 32-bit value of captured counter 5
40094 93 0x5D CCounter 5 MSB Read & Write
40095 94 0x5E CCounter 6 LSB Read & Write 32-bit value of captured counter 6
40096 95 0x5F CCounter 6 MSB Read & Write
40097 96 0x60 CCounter 7 LSB Read & Write 32-bit value of captured counter 7
40098 97 0x61 CCounter 7 MSB Read & Write
40099 98 0x62 CCounter 8 LSB Read & Write 32-bit value of captured counter 8
40100 99 0x63 CCounter 8 MSB Read & Write
40117 116 0x74 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 (only for counter 1 and 3)
40118 117 0x75 Counter Config 2 Read & Write
40119 118 0x76 Counter Config 3 Read & Write
40120 119 0x77 Counter Config 4 Read & Write
40121 120 0x78 Counter Config 5 Read & Write
40122 121 0x79 Counter Config 6 Read & Write
40123 122 0x7A Counter Config 7 Read & Write
40124 123 0x7B Counter Config 8 Read & Write
40133 132 0x84 Catch Read & Write Catch counter
40134 133 0x85 Status Read & Write Captured counter
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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
197 196 0x0C4 Default state of output 5 Read & Write Default state of output 5
198 197 0x0C5 Default state of output 6 Read & Write Default state of output 6
199 198 0x0C6 Default state of output 7 Read & Write Default state of output 7
200 199 0x0C7 Default state of output 8 Read & Write Default state of output 8
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
10805 804 0x324 Input 5 Read Input 5 state
10806 805 0x325 Input 6 Read Input 6 state
10807 806 0x326 Input 7 Read Input 7 state
10808 807 0x327 Input 8 Read Input 8 state
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
821 820 0x334 Output 5 Read & Write Output 5 state
822 821 0x335 Output 6 Read & Write Output 6 state
823 822 0x336 Output 7 Read & Write Output 7 state
824 823 0x337 Output 8 Read & Write Output 8 state
2113 2112 0x840 Capture 1 Read & Write Capture counter 1
2114 2113 0x841 Capture 2 Read & Write Capture counter 2
2115 2114 0x842 Capture 3 Read & Write Capture counter 3
2116 2115 0x843 Capture 4 Read & Write Capture counter 4
2117 2116 0x844 Capture 5 Read & Write Capture counter 5
2118 2117 0x845 Capture 6 Read & Write Capture counter 6
2119 2118 0x846 Capture 7 Read & Write Capture counter 7
2120 2119 0x847 Capture 8 Read & Write Capture counter 8
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Modbus
Address
Dec
Address
Hex
Address Register name Access Description
2129 2120 0x848 Captured 1 Read & Write Captured value of counter 1
2130 2129 0x849 Captured 2 Read & Write Captured value of counter 2
2131 2130 0x84A Captured 3 Read & Write Captured value of counter 3
2132 2131 0x84B Captured 4 Read & Write Captured value of counter 4
2133 2132 0x84C Captured 5 Read & Write Captured value of counter 5
2134 2133 0x84D Captured 6 Read & Write Captured value of counter 6
2135 2134 0x84E Captured 7 Read & Write Captured value of counter 7
2136 2135 0x84F Captured 8 Read & Write Captured value of counter 8
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8. 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.
Configurator is a universal program, whereby it is possible to configure all available
modules.
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User Manual
Table of Contents
1. Safety rules......................................................................................................................................3
2. Module Features..............................................................................................................................3
2.1. Purpose and description of the module....................................................................................3
2.2. Technical Specifications..........................................................................................................4
2.3. Dimensions of the product.......................................................................................................5
3. Communication configuration.........................................................................................................6
3.1. Grounding and shielding..........................................................................................................6
3.2. etwork Termination...............................................................................................................6
3.3. Setting Module Address in RS485 Modbus etwork..............................................................6
3.4. Types of Modbus Registers......................................................................................................7
3.5. Communication settings..........................................................................................................7
3.5.1. Default settings................................................................................................................7
3.5.2. Restore the default configuration.....................................................................................7
3.5.3. Configuration registers.....................................................................................................8
3.5.4. Watchdog function...........................................................................................................8
4. Indicators.........................................................................................................................................9
5. Module Connection.......................................................................................................................10
5.1. Digital inputs..........................................................................................................................10
5.2. Digital outputs........................................................................................................................10
5.3. Communication, power supply..............................................................................................10
6. Switches.........................................................................................................................................11
7. Modules Registers.........................................................................................................................12
7.1. Registered access...................................................................................................................12
7.2. Bit access...............................................................................................................................14
8. Configuration software..................................................................................................................16
Manufactured for:
Aspar s c
ul Oliwska 112
80-209 Chwaszczyno
Poland
ampero@ampero eu
www ampero eu
Tel [phone]
Expansion Module– 8 digital inputs, 8 digital outputs
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