Aspar Sfar Mini Modbus 1TE User manual

Mini Modbus 1TE
Expansion Module – 1 temperature input, 1 digital output
Version 1.0 — 02/01/2014 User Manual
Manufactured for

SfAR Mini Modbus 1TE
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 – 1 temperature input, 1 digital output © SfAR 2011 - 2014. All rights reserved.
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SfAR Mini Modbus 1TE
User Manual
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
The 1TE module allows you to measure the temperature with attached popular
sensor Pt100, Pt500, Pt1000, i100, KTY81-110, TC (Carel) and thermocouple (type
J, K, T, , S, R, B). In addition, it is possible to measure voltages in the range 256mV
(10μV resolution) and to 2048mV (100μV resolution) as well as the measurement of
resistance to 8kΩ. In addition, the module has one configurable digital outputs (P P or
P ).
Values are read via RS485 (Modbus), so we can easily integrate the module with
popular PLCs, HMI or PC equipped with the appropriate adapter.
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.
Expansion Module – 1 temperature input, 1 digital output © SfAR 2011 - 2014. All rights reserved.
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SfAR Mini Modbus 1TE
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2.2. Technical Specifications
Power Supply Voltage 10- 6V DC ± 20%
Maximum Current 72 mA @ 12V / 40 mA @ 24V
Inputs
No of inputs 1
Pt100 operation range -200°C - +850°C
Pt500 operation range -200°C - +850°C
Pt1000 operation range -200°C - +850°C
Ni100 operation range -60°C - +180°C
KTY81-110 operation range -55°C - +150°C
J thermocouple operation range -200°C - +1200°C
K thermocouple operation range -200°C - +1 00°C
T thermocouple operation range -200°C - +400°C
N thermocouple operation range -200°C - +1 00°C
S thermocouple operation range -0°C - +1700°C
R thermocouple operation range -0°C - +1700°C
B thermocouple operation range -0°C - +1800°C
Resistance From 0 to 8000Ω (1Ω resolution)
Voltage 0 to 2048mV (0,1mV resolution)
0 to 256mV (0,01mV resolution)
Resistance measuring current ~250μA
Measurement resolution 0,1°C
Measurement error ±0,5°C
Cold junction temperature measurement -55°C - +100°C
Measurement error of the cold junction temperature ±2°C
ADC processing time 150ms
Digital outputs Maximum current and voltage 250mA / 50V
Temperature Work -20 °C - +65°C
Storage -40 °C - +85°C
Connectors
Power Supply 2 pin
Communication pin
Inputs and outputs 2 x pin
Configuration Mini USB
Size
Height 90 mm
Length 56 mm
Width 17 mm
Interface RS485 Up to 128 devices
Expansion Module – 1 temperature input, 1 digital output © SfAR 2011 - 2014. All rights reserved.
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SfAR Mini Modbus 1TE
User Manual
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.
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.
Expansion Module – 1 temperature input, 1 digital output © SfAR 2011 - 2014. All rights reserved.
User Manual Version 1.0 02/01/2014 5 / 12
90
17 56
50
34

SfAR Mini Modbus 1TE
User Manual
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
0001 Input Registers Registered
Read
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
Expansion Module – 1 temperature input, 1 digital output © SfAR 2011 - 2014. All rights reserved.
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SfAR Mini Modbus 1TE
User Manual
3.4.2. Configuration registers
Modbus Dec Hex Name Values
Address
4000 2 0x02 Baud rate
0 – 2400
1 – 4800
2 – 9600
– 19200
4 – 8400
5 – 57600
6 – 115200
other – value * 10
40005 4 0x04 Parity
0 – none
1 – odd
2 – even
– always 1
4 – always 0
40004 0x0 Stop Bits LSB 1 – one stop bit
2 – two stop bits
40004 0x0 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
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.
IN LED indicates that the sensor is connected.
DO LED indicates that the output is on.
Expansion Module – 1 temperature input, 1 digital output © SfAR 2011 - 2014. All rights reserved.
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SfAR Mini Modbus 1TE
User Manual
5. Block diagram
. Module Connection
Expansion Module – 1 temperature input, 1 digital output © SfAR 2011 - 2014. All rights reserved.
User Manual Version 1.0 02/01/2014 8 / 12
MUX
ADC
IN A
IN B
COM
V+
OUT
μC
RS485
VCC
GND
GND
485
485+
COM
INB
INA
OUT
V+
GND
485
485 + VCC
GND
Mini Modbus 1TE
SfAR
ON
TX
IN
DO
USB
PT100 2 wire measurement
V+
V
SUPPLY
10 36V
COM
INB
INA
OUT
V+
GND
485
485 + VCC
GND
Mini Modbus 1TE
SfAR
ON
TX
IN
DO
USB
Thermocouple measurement
V+
V
SUPPLY
10 36V
COM
INV
INA
OUT
V+
GND
485
485 + VCC
GND
Mini Modbus 1TE
SfAR
ON
TX
IN
DO
USB
PT100 3 wire measurement
V+
V
SUPPLY
10 36V
Output connection (NPN type)
load
+
OUT
V+
GND
485
485 + VCC
GND
Mini Modbus 1TE
SfAR
ON
TX
IN
DO
USB
V+
V
SUPPLY
10 36V
Output connection (PNP type)
load
+
OUT
V+
GND
485
485 + VCC
GND
Mini Modbus 1TE
SfAR
ON
TX
IN
DO
USB
V+
V
ZASILANIE
10 36V

SfAR Mini Modbus 1TE
User Manual
7. Modules Registers
7.1. Registered access
Modbus Dec Hex Register Name Access Description
0001 0 0x00 Version/Type Read Version and Type of the device
0002 1 0x01 Address Read Module Address
4000 2 0x02 Baud rate Read & Write RS485 baud rate
40004 0x0 Stop Bits & Data Bits Read & Write No of Stop bits & Data Bits (see .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)
40010 9 0x09 Filter Read & Write Measurement filtering, value from 1 to 10
400 2 0x20 Received packets MSB Read & Write No of received packets
400 4 0x21 Received packets LSB Read & Write
400 5 4 0x22 Incorrect packets MSB Read & Write No of received packets with error
400 6 5 0x2 Incorrect packets LSB Read & Write
400 7 6 0x24 Sent packets MSB Read & Write No of sent packets
400 8 7 0x25 Sent packets LSB Read & Write
0051 50 0x 2 Inputs Read Connected sensors
Bit in high state → sensor is connected
40052 51 0x Outputs Read & Write Alarms state
bit 2 alarm output
005 52 0x 4 Temperature Read
Temperature or measured analog
in mV·10 for voltage to 2048mV
in mV·100 for voltage to 256mV
in °C·10 for temperature
in Ω for resistance
0054 5 0x 5 Junction temperature Read Module junction temperature
0055 54 0x 6 Measurement current Read Measurement current
40056 55 0x 7 MAX alarm level Read & Write If the temperature exceeds this value the
corresponding alarm flag is set
40057 56 0x 8 MIN alarm level Read & Write If the temperature is below this value corresponding
alarm flag is set
40058 57 0x 9 Alarm settings Read & Write
Alarm settings
0 – alarm due to the current temperature
1 – Remember the value of the alarm, until reset by the
master via Modbus
40059 58 0x A Constant junction temperature Read & Write Value of junction temperature
40060 59 0x B Junction temperature offset Read & Write Junction temperature offset
Expansion Module – 1 temperature input, 1 digital output © SfAR 2011 - 2014. All rights reserved.
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40061 60 0x C Input settings Read & Write
Analog input mode:
0 – input disabled
1 – voltage to 2048mV
2 – voltage to 256mV
– J thermocouple
4 – K thermocouple
5 – T thermocouple
6 – N thermocouple
7 – S thermocouple
8 – R thermocouple
9 – B thermocouple
10 – Pt100 -wire
11 – Pt100 2-wire
12 – resistance to 8kΩ
1 - Ni100
14 – KTY81-110
15 – Pt500 -wire
16 – Pt500 2-wire
17 – Pt1000 -wire
18 – Pt1000 2-wire
19 – NTC Carel 2-wire1
+ 2 – junction temperature is taken from register
40081 "Constant junction temperature"
40062 61 0x D Output settings Read & Write
Alarm output settings
0 – output is set by PLC
+256 – Output is set if value is greater than Alarm
Value (register 40065) („cooling”)
+512 – Output is set if value is less than Alarm Value
( register 40065) („heating”)
4006 62 0x E Alarm Value Read & Write Alarm value for outputs
40064 6 0x F Alarm hysteresis Read & Write The hysteresis value for alarm outputs
40065 64 0x40 Input resistance Read & Write Lead wire resistance for each input
7.2. Bit access
Modbus
Address
Dec
Address
Hex
Address
Register
name Access Description
801 800 0x 20 Input Read Set when the sensor is connected
817 816 0x 0 Alarm Read Alarm state
818 817 0x 1 Digital output Read & Write State of digital output
1 Sensor must be connected in paraller to resistor 7.5kΩ 1%
Expansion Module – 1 temperature input, 1 digital output © SfAR 2011 - 2014. All rights reserved.
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