Sfar SFAR-1M-4DO User manual

SFAR-1M-4DO
User Manual
Expansion Module –4 Digital Outputs
Global Control 5 Sp. z o.o.
Warsaw, Poland
www.gc5.pl

SFAR-1M-4DO User Manual
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Table of contents
2.1. Purpose and description of the module....................................................................... 4
2.2. Technical specifications ................................................................................................. 5
2.3. Dimensions of the product ............................................................................................. 6
3.1. Grounding and shielding ................................................................................................. 6
3.2. Network termination........................................................................................................ 7
3.3. Types of Modbus registers............................................................................................. 7
3.4. Communication settings ................................................................................................ 7
3.4.1. Default settings...................................................................................................... 8
3.4.2. Configuration registers......................................................................................... 8
3.4.3. Watchdog information.......................................................................................... 9
5.1. Block diagram ................................................................................................................... 9
5.2. Connection of digital output.........................................................................................10
6.1. Registered access..........................................................................................................10
6.2. Bit access.........................................................................................................................11

SFAR-1M-4DO User Manual
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Thank you for choosing our product.
This manual will help you with proper handling and operating of the device.
The information included 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 discharge you from the liability of your own judgment and
verification.
We reserve the right to change product specifications without notice.
Please read the instructions carefully and follow the recommendations concluded therein.
WARNING!
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
1. Refer to this manual before the first use
2. Make sure that all cables are connected properly before the first use
3. Please ensure proper working conditions, according to the device specifications
(e.g., supply voltage, temperature, maximum power consumption)
4. Turn the power supply off before making any modifications to wiring connections.
2. 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 to indicate the status of inputs and outputs which
is 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
10-38 V DC; 10-28 V AC
Power consumption1
1 W @ 24 V DC
2 VA @ 24 V AC
Digital Outputs
No of outputs
4
Max Voltage
55 V
Max current
250 mA
Output Type
PNP
Isolation
1500 Vrms
Temperature
Work
-20°C - +65°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
56,4 mm
Width
17,5 mm
Interface
RS485
Up to 128 devices
Table 1 - Technical specifications
1
Power consumption with active Modbus transmission, all outputs on

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2.3. Dimensions of the product
The appearance and dimensions of the module are shown below. The module is mounted
directly to the rail in the DIN industry standard.
3. Configurating of the communication
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.
Picture 1 - Dimensions of the product

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3.2. Network termination
Transmission line effects often represent the problem of data communication networks.
These problems include reflections and signal attenuation.
To eliminate the presence of reflections at 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 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
Table 2 - Types of variables available
3.4. Communication settings
The data stored in the module’s memory is given in the16-bit registers. The access to
registers happens via Modbus RTU or Modbus ASCII.

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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
Table 3 - Default settings
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
Table 4 - Configuration registers

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3.4.3. Watchdog information
This 16-bits 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 reassure the safety
of persons or property.
The default value is 0 milliseconds which means the watchdog function is disabled.
4. 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 the output is on.
Table 5 - Description of indicators
5. Module Connection
5.1. Block diagram
Picture 2 - Indicators
Picture 3 - Block diagram

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5.2. Connection of digital output
6. Modules Registers
6.1. 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 0)
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 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
40052
51
0x33
Outputs
Read & Write
Output state
Table 6 - Registered access
Picture 4 –Connection of digital output

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6.2. 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
Table 7 - Bit access

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7. Configuration software
Modbus Configurator is the type of software which is designed to set the communication
module registers over Modbus network as well as to read and write the current value of other
registers of the module. It’s a convenient way to test the system as well as to observe real-
time changes in the registers.
Communication with the module happens via the USB cable. The module does not require
any drivers.
Configurator is an universal software, whereby it is possible to configure all available
modules.
Picture 5 - Configuration process
Picture 6 - Configurator