GC5 iSMA MINI Series User manual

iSMA MINI and MIX Series
I/O modules
User Manual
Modbus
Global Control 5 S.A.
Warsaw, Poland
www.globalcontrol5.com

Table of contents
1Introduction................................................................................................................................................ 5
1.1 Revision history ....................................................................................................................................................5
1.2 Safety rules............................................................................................................................................................6
1.3 Technical specifications .....................................................................................................................................7
1.4 Summary table for all modules ..................................................................................................................... 10
1.5 Dimensions ........................................................................................................................................................ 11
1.6 Power supply connection ................................................................................................................................ 12
DC power connection ....................................................................................................................................... 12
AC power connection ....................................................................................................................................... 12
1.7Connecting the communication bus (RS485) ............................................................................................. 12
1.8 LED Indicators ................................................................................................................................................... 13
1.9 Grounding and shielding.................................................................................................................................. 14
1.10 RS485 network termination ............................................................................................................................ 14
1.11 Setting module address on Modbus network ............................................................................................. 15
1.12 Baud rate selection ........................................................................................................................................... 15
1.13 Protocol selection ............................................................................................................................................. 16
1.14 Restoring the default settings ........................................................................................................................ 16
1.15 Default Settings................................................................................................................................................. 17
2Configuration registers........................................................................................................................... 18
2.1 Firmware version and module type (30001) ............................................................................................... 18
2.2 Module address (30002) ................................................................................................................................. 18
2.3 Baud rate and protocol (30003)..................................................................................................................... 19
2.4 Counter of received messages (30004) ....................................................................................................... 19
2.5 Counter of error messages (30006).............................................................................................................. 19
2.6 Counter of sent messages (30008) .............................................................................................................. 19
2.7 Up time (30012) ................................................................................................................................................ 19
2.8 Hardware_version (30130).............................................................................................................................. 20
2.9 MAC_address (30131) ..................................................................................................................................... 20
2.10 Device actions (40001) .................................................................................................................................... 20
2.11 Baud rate (40136) ............................................................................................................................................. 20
2.12 Stop bits (40137)............................................................................................................................................... 20
2.13 Data bits (40138) .............................................................................................................................................. 21
2.14 Parity bit (40139)............................................................................................................................................... 21
2.15 Response delay time (40140)......................................................................................................................... 21
2.16 Watchdog time (40141)................................................................................................................................... 21
3Local I/O ................................................................................................................................................... 23
3.1 Universal Inputs connections ......................................................................................................................... 23
Connection of Universal Input to measure voltage 0 – 10V .................................................................... 23
Connection of the Universal Input to measure current 0 – 20 mA ......................................................... 23
Connection of Universal Input to measure the temperature.................................................................... 24
Connection of Universal Input as a Digital Input (Dry Contact) ............................................................... 24
3.2 Universal Inputs MODBUS Registers ............................................................................................................ 25
Status of Universal Inputs working as Digital Inputs (30017) ................................................................. 25
Universal Input voltage (current) measure 1 - 8 (30071, 30073, 30075, 30077, 30079, 30087,
30089, 30091) ................................................................................................................................................... 25
Universal Input temperature measurement 1 - 8 (30072, 30074, 30076, 30078, 30080, 30095,
30097, 30099) ................................................................................................................................................... 25
Universal Input resistance measurement 1 - 8 (30103, 30104 – 30117, 30118) ................................ 25

Universal Input configuration 1 - 8 (40151 – 40158)................................................................................. 25
Filter time constant of the Universal Input 1 - 8 (40159 – 40166).......................................................... 26
Resolution of the Universal Inputs (40167) ................................................................................................. 26
3.3 Digital Inputs Connections.............................................................................................................................. 27
Connection of Digital Input (Dry Contact) .................................................................................................... 27
3.4 Digital Input MODBUS Registers.................................................................................................................... 27
State of Digital Inputs (30016) ....................................................................................................................... 27
Counter 1 – 12 (40023, 40024 – 40045, 40046) ....................................................................................... 28
Resetting the counters (40022) ..................................................................................................................... 29
3.5 Analog Output Connections............................................................................................................................ 29
Connection of 0-10V Analog Output ............................................................................................................. 29
Connecting relay to Analog Output ............................................................................................................... 29
Connecting an actuator to the Analog Output ............................................................................................ 30
3.6 Analog Output MODBUS Registers ............................................................................................................... 30
State of Analog Outputs operating as Digital Outputs (40019)............................................................... 30
Value of 1-6 Analog Outputs (40121 – 40126) ........................................................................................... 30
Default state of the Analog Outputs (digital) (40144)................................................................................ 30
Default state of 1-6 Analog Outputs (40145 – 40150).............................................................................. 31
Configuration mode of 1-6 Analog Outputs (40168 – 40173)................................................................. 31
Hand control status of analog outputs (30015) ......................................................................................... 31
Hand control value of 1-4 Analog Outputs (30125 - 20128)..................................................................... 32
3.7 Digital Output (relay) Connections................................................................................................................. 33
Connecting the solenoid valve to the Digital Output.................................................................................. 33
Connecting a resistive load to the Digital Output ....................................................................................... 33
Connecting an inductive load to the Digital Output.................................................................................... 33
3.8 Digital Output (relay) MODBUS Registers .................................................................................................... 34
State of Digital Outputs (40018) .................................................................................................................... 34
Default state of Digital Outputs (40143) ...................................................................................................... 34
Hand control status of Digital Outputs (30015).......................................................................................... 34
3.9 Triac Output Connections ............................................................................................................................... 35
Connecting the solenoid valve to the Triac Output .................................................................................... 35
Connecting a resistive load to the Triac Output.......................................................................................... 35
3.10 Triac Output MODBUS Registers ................................................................................................................... 36
State of Triac Outputs (40018)....................................................................................................................... 36
Default state of Triac Outputs (40143) ......................................................................................................... 36
Value of 1-4 Triac PWM Outputs (40121 – 40124).................................................................................... 36
Default state of 1-4 Triac PWM Outputs (40145 – 40148)....................................................................... 36
Configuration mode of 1-4 Triac Outputs (40168 – 40171)..................................................................... 36
Hand control status of the Triac Outputs (30015) ..................................................................................... 37
3.11 Special application modes for 4I4O-H, 4I4O-H-IP, 4U4O-H, and 4U4O-H-IP .......................................... 38
Operation Mode registers (40176, 40180, 40184, and 40188) ................................................................ 39
Time Value registers (40177,40181,40185,40189) .................................................................................... 42
Command register (40020) ............................................................................................................................ 43
Block Inputs register (40021) ......................................................................................................................... 43
Setpoint registers (40178, 40182, 40186, 40190) ...................................................................................... 43
Differential registers (40179,40183,40187,40191)..................................................................................... 43
4WEB Configuration - IP version only ..................................................................................................... 44
4.1 Web server access............................................................................................................................................ 44
4.2 Device page........................................................................................................................................................ 44
4.3 Local I/O status and configuration................................................................................................................ 45
Universal Inputs................................................................................................................................................. 45
Configuration of special application mode .................................................................................................. 46

Digital Inputs ...................................................................................................................................................... 47
Digital Outputs................................................................................................................................................... 47
Analog Outputs.................................................................................................................................................. 48
4.4 RS485 Configuration ........................................................................................................................................ 49
4.5 IP Configuration................................................................................................................................................. 50
4.6 Device management ........................................................................................................................................ 51
4.7 Contact................................................................................................................................................................ 51
5Modbus TCP/IP modules....................................................................................................................... 52
5.1 Modbus TCP/IP ................................................................................................................................................. 52
5.2 Module as Modbus TCP/IP Gateway to RS485 .......................................................................................... 52
6List of all Modbus Registers .................................................................................................................. 54
7List of supported temperature sensors................................................................................................ 63

1Introduction
1.1 Revision history
Rev
Date
Description
1.0
2015.08.28
First edition
1.1
2016.02.01
Reason for the creation of a new version of the document:
•In 12.2015 GC5, released a new hardware version of MIX module with a more
powerful processor and a USB port. For this hardware, and for all MINI series
devices, we released 4.0 firmware which contains a bug fix, firmware
improvements, and a rebuilt BACnet protocol (new object, COV).
•As of 2016, all the modules purchased are equipped with improved versions of
the relays, which allows for increasing the capacitive load. Details of the
technical specifications added.
•Note: This document was created for devices with firmware version 4.0 and
above. For previous firmware version please read Modbus Manual version 1.0.
•Changes in the Document:
•Information about the capacitive load relay added to the technical
specifications.
•Information about load Triac Outputs added to the technical specifications.
•Description of the new MINI module 4x Triac Outputs: 4TO-H and 4TO-H-IP
added.
•MINI - 4I40-H and 4I40-H-IP Module built-in application: Change of logic in the
Time relay mode. Now, the timer counts from the falling edge (it used to start
counting from the rising edge).
•New gateway functionality blocking Send Modbus Error.
•Tables with PT1000 and NI1000 updated with more accurate data with new
FW measuring resistance at these sensors with the accuracy of 0.1 Ω.
1.2
2017.01.03
Reason for the creation of a new version of the document:
New functions:
•New HVAC functions: Heating and Cooling in 4U4O, based on output
thermostatic control with a setpoint and differential value setting;
•New input mode for 4I4O added: Time Relay NC [ms], Time Relay NO and NC in
seconds, Input Forwarding;
•New input mode added for 4U4O: Ordinary IO, Monostable Relay, Bistable Relay,
Time Relay NO and NC [ms], Time Relay NO and NC in seconds, Input
Forwarding, Heating, Cooling with corresponding BACnet objects and Modbus
registers;
•Output for resetting to default added after input mode change in 4U4O and
4I4O;
Improvements:
•Improved BACnet COV Increment now can have values with the resolution of
0.1;
•BACnet COV Increment access (read/write) through USB added;
•Power Led added, flashing when the IO watchdog is triggered;
•IO watchdog reset after read/write registers through USB modified;
•Sensors added for detecting short circuit and disconnection, regardless of filter
settings on universal inputs;
Bugs fixed:

•Fixed bug with Stop bits, it was always 1;
1.3
2017.05.16
Reason for the creation of a new version of the document:
New functions:
•Hardware Version information on the main tab on the web page and in the
Modbus register added
•new action in Modbus register no 0 – enter the bootloader
•RS485 biasing control added for MINI modules with hardware version >= 2.0
(option unavailable in MIX modules)
•www page: RS485 Biasing Resistors activating option (appears only in MINI
modules with hardware >= 2.0)
Improvements:
•modules names on web page corrected (added -H for all modules with hand
operation switches)
1.4
2017.12.07
The reason for the creation of a new version of the document: On 07.12.2017, GC5
released a new firmware version 6.0 for MIX and MINI modules. New firmware contains
a bug fix, improvements and changes in BACnet protocol, according to BACnet Testing
Laboratories certification requirements.
New functions:
•Firmware Version 6.0 released with BACnet certification
Improvements:
•fixed out of service flags in AO, BO and TO
•fixed overridden flags in AO, BO and TO
•fixed bug with number of counters for Binary input object (now variable is 32
bit)
•changed AO-1, BO-1, TO-1 HAND_STATUS Access to read-only
changed resistance table for 2.2K3A1 sensor
1.5
2018.10.05
The reason for the creation of a new version of the document:
•Corrections of typing errors in the text
•Added imperial unit of measure
1.6
23.01.2020
The reason for the creation of a new version of the document:
New functions:
•New temperature sensors implemented in Celsius and Fahrenheit degrees
•New Modbus function 0x17 Read/Write Multiple registers
•New Modbus function 0x2B to read the VENDOR_NAME,MODEL_NAME,
FW_VERSION, HOMEPAGE
•Supporting Modbus address 0xFF for communication with the gateway (IP
module)
Improvements:
•Improved filtering on UI
•Fixed one record in sensor 30k6A1 table –resistance 60713 to 80713 (5°C)
Table 1. Revision history
1.2 Safety rules
•Note: Incorrect wiring of this product can damage it and lead to other hazards.
Make sure the product has been correctly wired before turning the power ON.
•Before wiring, or removing/mounting the product, be sure to turn the power OFF.

Failure to do so might result in electric shock.
•Do not touch electrically charged parts, such as the power terminals. Doing so may
result in electric shock.
•Do not disassemble the product. Doing so may result in electric shock or faulty
operation.
•Use the product within the operating ranges recommended in the specification
(temperature, humidity, voltage, shock, mounting direction, atmosphere etc.).
Failure to do so might result in fire or faulty operation.
•Tighten the wires firmly to the terminal. Insufficient tightening of the wires to the
the terminal might cause a fire.
1.3 Technical specifications
Power supply
Voltage
24 V AC/DC ± 20%
Power consumption
Module type
@ 24 V DC
@ 24 V AC
8I
0.4 W
0.6 VA
8I-IP
1.4 W
2.1 VA
8U
0.5 W
0.8 VA
8U-IP
1.5 W
2.3 VA
4I4O-H
1.2 W
1.8 VA
4I4O-H-IP
2.2 W
3.3 VA
4U4O-H
1.2 W
1.8 VA
4U4O-H-IP
2.2 W
3.3 VA
4U4A-H
2.2 W
3.3 VA
4U4A-H-IP
3.2 W
4.8 VA
4O-H
1.6 W
2.4 VA
4O-H-IP
2.6 W
3.9 VA
4TO-H
1.0 W
1.5 VA
4TO-H-IP
2.0 W
3.0 VA
MIX18
3.0 W
4.5 VA
MIX18-IP
4.4 W
6.6 VA
MIX38
5.0 W
7.5 VA
MIX38-IP
7.4 W
11.1 VA
Universal Inputs
Temperature input
•Measurement with RTDs attached
•Accuracy ±0.1˚C
•For Pt1000 and Ni1000 sensors use 16-bit
resolution
Voltage input
•Voltage measurement from 0 - 10 V
•Input impedance 100 kΩ
•Measurement accuracy ±0.1%

•Measurement resolution 3 mV@12-bit and 1
mV@ 16-bit
Current input
•Current measurement 0 - 20 mA
•Required external resistor 200 Ω
•Measurement accuracy ±1.1%
•Measurement resolution 15 µA @ 12-bit and 5 µA
@ 16-bit
Resistive input
•Measurement of resistance from 0 to 1000 kΩ
•Measurement resolution for 20 kΩ load 20 Ω@12-
bit and 1 Ω@16-bit
•Measurement resolution for PT1000 and NI1000
0.1Ω@16bit
Resistance measurement method
Voltage divider
Dry contact input
Output current ~1 mA
Measurement resolution
12-bit (default) or 16-bits
Processing time
•10 ms/channel at 12-bits
•140 ms/channel at 16-bits
Digital Inputs
Type
Dry contact
Max input frequency
100 Hz
Analog Outputs
Voltage range
0 to 10 V
Max. load current
20 mA
Resolution
12-bit
Accuracy
±0.5%
Digital Outputs
(relays)
Contact material
AgSnO2
Resistive load AC1
3 A @ 230 V AC or 3 A @ 30 V DC
Inductive load AC3
75 VA @ 230 V AC or 30 W @ 30 V DC
Capacitive load
•50 W @ LED + PS 230 V AC
•100 W @ fluorescent lamps with electronic
ballast
•75 W @ CFL Compact fluorescent lamp
Digital Outputs
(relays)
4O-H and 4O-H-IP
Contact material
AgSnO2
Resistive load AC1
8 A @ 230 V AC or 8 A @ 30 V DC
Inductive load AC3
360 VA@ 230 V AC or 90 W @ 30 V DC
Capacitive load
•120 W @ LED + PS 230 V AC
•240 W @ fluorescent lamps with electronic
ballast
•180 W @ CFL Compact fluorescent lamp
Triac Outputs
Continuous load per channel
0.5 A @ 20 V AC up to max. 250 V AC
Peak load per channel
1.5 A @ 20 V AC up to max. 250 V AC (30 s)
Gate Control
Zero crossing turn ON
Frequency Range
47 to 63 Hz

Snubber
Snubberless Triac
RS485 Interface
RS485
Up to 128 devices
Communication protocols
Modbus RTU, Modbus ASCII
or BACnet set by switch
Baud rate
From 2400 to 115200 set by switch
Address
0 to 99 set by switch
Ethernet
MIX18-IP, MIX38-IP
2x Fast Ethernet
Switch mode
Baud rate
10/100 Mb/s
8I-IP, 8U-IP, 4I4O-H-IP, 4U4O-H-IP, 4U4A-H-IP, 4O-H-IP, TO-H-IP
1x Fast Ethernet
IP Interface
Baud rate
10/100 Mb/s
USB
USB
Mini USB 2.0
Ingress protection
IP
IP40
Temperature
Storage
-40˚C to +85˚C (-40°F to 185°F)
Operating
-10˚C to +50˚C (14°F to 122°F)
Humidity
Relative
5% to 95%
Connectors
Type
Removable
Maximum cable size
2.5 mm2 (14 AWG)
Maximum tightening torque
0,35 Nm
Dimensions
MIX18, MIX18-IP
Width
110 mm (4.331 in)
Length
88 mm (3.4646 in)
Height
62 mm (2.441 in)
MIX38, MIX38-IP
Width
110 mm (4.331 in)
Length
160 mm (6.2993 in)
Height
62 mm (2.441 in)
MINI Series
Width
110 mm (4.331 in)
Length
37 mm (1.457 in)
Height
62 mm (2.441 in)
Table 1 Technical specifications

1.4 Summary table for all modules
Module
type
UI
DI
AO
DO
TO
Modbus
RS485
Modbus
TCP/IP
BACnet
MSTP
BACnet
IP
4I4O-H
4
4
✓
✓
4I4O-H-IP
4
4
✓
✓
✓
4O-H
4 (NC/NO-8A)
✓
✓
4O-H-IP
4 (NC/NO-8A)
✓
✓
✓
4U4A-H
4
4
✓
✓
4U4A-H-IP
4
4
✓
✓
✓
4U4O-H
4
4
✓
✓
4U4O-H-IP
4
4
✓
✓
✓
8I
8
✓
✓
8I-IP
8
✓
✓
✓
8U
8
✓
✓
8U-IP
8
✓
✓
✓
4TO-H
4
✓
✓
✓
4TO-H-IP
4
✓
✓
✓
MIX18
5
5
4
4
✓
✓
MIX18-IP
5
5
4
4
✓
✓
✓
MIX38
8
12
6
12
✓
✓
MIX38-IP
8
12
6
12
✓
✓
✓
RTU
ASCII
Modbus
Gateway
IP/RS485
Master
Slave
Table 2. Summary table for all modules

1.5 Dimensions
Figure 1. MINI series dimensions
Figure 2. MIX18 and MIX18-IP dimensions
Figure 3. MIX38 and MIX38-IP dimensions

1.6 Power supply connection
DC power connection
Figure 4. DC power supply connection
AC power connection
Figure 5. AC power supply connection
1.7 Connecting the communication bus (RS485)
Figure 6. RS485 connection

1.8 LED Indicators
Figure 7. Top panel MIX18-IP
Figure 8. Top panel MIX38-IP
Figure 9. Top panels 8I and 8I-IP
Figure 10. Top panels 8U and 8U-IP
Figure 11. Top panels 4I4O-H and 4I4O-H-IP
Figure 12. Top panels 4U4O-H and 4U4O-H-IP
Figure 13. Top panels 4U4A-H and 4U4A-H-IP
Figure 14. Top panels 4O-H and 4O-H-IP
Figure 15. Top panels 4TO-H and 4TO-H-IP

•The power LED is ON (green) when the module runs properly.
•Communication LED is ON (orange) for 20 ms after sending each message.
If the module receives/sends a lot of messages, LED can be lit continuously.
•LEDs indicating the status of the Universal Inputs are lit when the resistance
connected to the input is less than 5 kΩ (Dry Contact input is active).
WARNING! The LED also lights up when the voltage connected to the input has a very low
potential.
•LEDs indicating the status of the digital inputs are lit when the input is active.
LEDs indicating the status of the analog outputs are lit when the output voltage or
PWM factor is different from 0.
•LEDs indicating the status of the digital outputs are lit when the output is enabled.
1.9 Grounding and shielding
In most cases, I/O modules will be installed in an enclosure along with other devices which
generate electromagnetic radiation. Relays, contactors, transformers, motor invertors etc.
are the examples of these devices. Radiation can induce electrical noise into both power
and signal lines, as well as direct radiation into the module causing negative effects for 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, cable shield grounding, using protective elements for electromagnetic switching
devices, correct wiring, and choosing the cables of proper type and cross-section.
1.10 RS485 network termination
Transmission line effects often present a problem in data communication networks. These
problems include reflections and signal attenuation.
To eliminate the presence of reflections from the end of the cable, it must be terminated at
both ends with a resistor across the line, in accordance with its characteristic impedance.
Both ends must be terminated since the direction of propagation is bidirectional. In case of
an RS485 twisted pair cable, this termination is typically 120 Ω.

1.11 Setting module address on Modbus network
To determine the address on the Modbus network, the module is equipped with two rotary
switches, S1 and S2, located on the top panel of the device.
It is possible to set the device address from 0 to 99.
The address is set with the following formula:
Address = S2 • 10 + S1
where S1 and S2 are the values of the switches.
For example:
Figure 16. Exemplary address setting
Switches set as in the figure above will set the module address to 11.
1.12 Baud rate selection
Transmission baud rate is set with S3 switch (sections 1, 2 and 3) in accordance with the
following table:
1
2
3
Baud rate
OFF (0)
OFF (0)
OFF (0)
Defined by the user in the registry
OFF (0)
OFF (0)
ON (1)
76800
OFF (0)
ON (1)
OFF (0)
4800
OFF (0)
ON (1)
ON (1)
9600
ON (1)
OFF (0)
OFF (0)
19200
ON (1)
OFF (0)
ON (1)
38400
ON (1)
ON (1)
OFF (0)
57600
ON (1)
ON (1)
ON (1)
115200 (factory set)
Table 3. Baud rate selection

1.13 Protocol selection
The protocol is selected with sections 4 and 5 of the S3 switch according to the table below:
4
5
Protocol
OFF (0)
OFF (0)
Modbus RTU
OFF (0)
ON (1)
Modbus ASCII
ON (1)
OFF (0)
BACnet Master
ON (1)
ON (1)
BACnet Slave
Table 4. Protocol selection
1.14 Restoring the default settings
To restore the default configuration of all registers, follow the steps below:
1. Turn off the power supply;
2. Set section 6 of S3 switch to ON;
3. Turn on the power supply; power LED blinks;
4. Switch section 6 of S3 switch to OFF to restore the default settings. To cancel the
reset, turn off the power and switch section 6 of S3 switch to the OFF position.

1.15 Default Settings
In its out-of-the-box state, as well as after restoring the default values, the device has got
the following default register values:
Register Name
Default Value
COUNTER
0
BAUD RATE
76800 (76800 bps)
STOP BITS
1
DATA BITS
8
PARITY BITS
0
RESPONSE DELAY
0
WATCHDOG TIME
0 ( disabled)
STATE OF THE DIGITAL OUTPUTS AFTER START
0
STATE OF THE ANALOG OUTPUTS (DIGITAL)
AFTER START
0
STATE OF THE ANALOG OUTPUTS AFTER START
0
UNIVERSAL INPUT CONFIGURATION
1
INPUT FILTER TIME CONSTANT
2
UNIVERSAL INPUT RESOLUTION
0
ANALOG OUTPUT CONFIGURATION
0
Only for modules with IP
USERNAME
platform
PASSWORD
1000
IP ADDRESS
192.168.1.123
MASK
255.255.255.0
GATEWAY
192.168.1.1
HTTP PORT
80
MODBUS TCP PORT
502
MODBUS TCP TIMEOUT
60s
RS485 TIMEOUT
1000ms
SEND MODBUS ERRORS
DISABLED
BACNET ID
826001
BACNET UDP PORT
47808 (0xBAC0)
Table 5. Default values

2Configuration registers
WARNING! Changing the parameters concerning the configuration of the transmission will
only take effect after restarting the unit (except for the registers the value of which is read
from the switch).
2.1 Firmware version and module type (30001)
In this register type and firmware version of the module are encoded.
A low byte contains information about the type of module in accordance with the table
below:
Value
Type
8110 (0x5116)
8I
9110 (0x5B16)
8I-IP
8410 (0x5416)
8U
9410 (0x5E16)
8U-IP
8310 (0x5316)
4I4O-H
9310 (0x5D16)
4I4O-H-IP
8510 (0x5516)
4U4O-H
9510 (0x5F16)
4U4O-H-IP
8610 (0x5616)
4U4A-H
9610 (0x6016)
4U4A-H-IP
8210 (0x5216)
4O-H
9210 (0x5C16)
4O-H-IP
8710 (0x5716)
4TO-H
9710 (0x6116)
4TO-H-IP
5010 (0x3216)
MIX18
5110 (0x3316)
MIX38
5210 (0x3416)
MIX18-IP
5310 (0x3516)
MIX38-IP
Table 6. Firmware version and a module type
The high byte contains the module firmware version multiplied by 10.
For example:
In 30001register, number 1281010 = 0x320A16, which means that it is module MIX18 (0x32)
with firmware in version 1.0 (0x0A16 = 1010).
2.2 Module address (30002)
This register contains information about the address of the Modbus module. This address
is set with switches S1 and S2 (see section Setting module address on Modbus ).

2.3 Baud rate and protocol (30003)
The register contains information about the baud rate and type of protocol in accordance
with the table below. This register reflects the state of S3 switch.
Baud rate
Protocol
Bit 0
Bit 1
Bit 2
Baud rate
Bit 3
Bit 4
Protocol
0
0
0
User defined
0
0
Modbus RTU
0
0
1
76800
0
1
Modbus ASCII
0
1
0
4800
1
0
BACnet Master
0
1
1
9600
1
1
BACnet Slave
1
0
0
19200
1
0
1
38400
1
1
0
57600
1
1
1
115200
Table 7. Baud rate and protocol
2.4 Counter of received messages (30004)
32-bit register with the number of valid Modbus messages received by the module which
was powered up last. The value is reset after the power cycle or after changing transmission
parameters (speed, stop bits, parity, etc.).
2.5 Counter of error messages (30006)
32-bit register with the number of error Modbus messages received by the module which
was powered up last. The value is reset after the power cycle or after changing transmission
parameters (speed, stop bits, parity, etc.).
2.6 Counter of sent messages (30008)
32-bit register with the number of error Modbus messages received by the module which
was powered up last. The value is reset after the power cycle or after changing transmission
parameters (speed, stop bits, parity, etc.).
2.7 Up time (30012)
This 32-bit register contains module counting time in seconds from the last powering up or
module reset.

2.8 Hardware_version (30130)
This 16-bit register contains the module hardware version multiplied by 10.
2.9 MAC_address (30131)
This 32-bit register contains MAC address information of the module.
2.10 Device actions (40001)
Setting register 40001 according to the table below will enable 1 of 4 available actions:
module reset, reloading the settings, setting to default and entering the bootloader.
Value
Action
511
Reset
767
Reload settings
1023
Set to default
1279
Enter Bootloader
Table 8. Device actions
2.11 Baud rate (40136)
When sections 1, 2 and 3 of S3 switch are in off position, the baud rate is determined in
accordance with this register. Baud rate is determined with the following formula:
Baud rate = register value • 10
2.12 Stop bits (40137)
The number of the stop bits is determined on the basis of this register in accordance with
the following table:
Value
No. of stop bits
1 (default)
1
2
2
256
RS485 biasing*
Table 9. Stop bits
*Bit No. 8 activates RS485 biasing resistors in order to pull-up the voltage on RS485 bus.
When bit No. 8 is true (bit 8 = 1), RS485 biasing resistors are activated. The function is only
available in MINI I/O modules with hardware version >= 2.0
The biasing resistors are useful in case when iSMA modules are connected with third-party
devices with the same RS485 bus and communication errors appear on the network.
WARNING! Only a single device in the network can have biasing resistors activated!