Modbus Eavesdrop to MQTT IIoT
SmartSwarm 351 Gateway
Features
Transparently connects to existing serial Modbus RTU networks
Provides parallel data feed into Enterprise IIoT systems while the existing
Modbus network continues to operate
User configurable data enrichment and event triggers
Extensive configuration options for interpretation of Modbus data
Cellular or Ethernet connection to IIoT system
Also acts as LAN to WAN bridge for 3rd party device connection
Introduction
Seamlessly connect existing Modbus process systems into the IoT
While a number of “Modbus to MQTT” gateways exist, most act as the local Modbus master devices, recovering information from a network of connected slaves. This presents a
problem for operators of existing process control systems as a Modbus network can only have a single master device. The SmartSwarm 351 overcomes this limitation by transparently
“eavesdropping” on communications between the existing master device and the connected slaves. It non-disruptively derives the I/O status of connected devices and uses this
information to provide a real time data feed to a connected IIoT architecture.
Data Filtering
Much of the data that the gateway will see in the Modbus network is of little value. If a temperature reading rarely changes, for example, there is no point in reporting it every time it
is sampled. For this reason, in addition to enriching the data, SmartSwarm 351 also allows users to configure the triggers that will cause a monitored value to be published. Users
can also configure what is published once an event trigger condition is met – this might be just the changed value, a range of data, or all data from the same register type within the
RTU. This lets users optimize the traffic across the communications network. At the same time, the gateway decreases the communications overhead and the processing bandwidth
needed to handle it.
04 Read Input Registers
Specification
05 Force Single Coil* *
06 Preset Single Register*
15 Force Multiple Coils*
Power
Voltage
Power
16 Preset Multiple Registers*
10 ~ 60 VDC; PoE PD optional
4W typical; 11W peak
22 Mask Write 4X Register*
23 Read/Write 4X Registers*
* Note that for output command types, the unit interprets these as inputs to the IoT enrichment
process. It does not support output of data from the IoT system
Environmental
Operating Temperature
-40 °C to 75 °C (-40 °F to 167 °F)
-35 °C (-31 °F)
-40 °C to 85 °C (-40 to 185 °F)
0% to 95% (non-condensing)
0 to 95% non condensing
IP42
Cold Start Temperature
Modbus Data Types Supported
Boolean
Storage Temperature
Operating Humidity
Storage Humidity
Ingress Protection
Multi-bit Encoded Boolean (e.g. 2 bits provide 4 states for one point)
16 Bit Packed Boolean
16 Bit Integer (signed/ unsigned)
16 Bit Counter
Mechanical
32 Bit Integer (signed/unsigned) (single 32 bit or 2x16 bit registers)
32 Bit Counter (single 32 bit or 2x 16 bit registers)
32 Bit Float (single 32 bit or 2x 16 bit registers)
32 Bit Packed Boolean (single 32 bit or 2x 16 bit registers)
Multi-register Text
Dimensions
55 x 97 x 125mm (2.17 x 3.82 x 4.9)
375g
Flat Surface or DIN rail
Weight
Mounting
Ports & Interfaces
Endian order is configurable both within and between registers
Serial Modbus RTU interface RS-232 or RS-485
Ethernet
SIM
2 x 10/100 Mb via RJ45
Mini SIM (2FF)
Ordering Information
ANT & DIV antennae
Cellular
SMA
BB-SG30300320-51
BB-SG30300325-51
BB-SG30000320-51
BB-SG30000325-51
BB-SG30500320-51
EMEA Cellular, no accessories
EMEA Cellular, with accessories
no Cellular, no accessories
no Cellular, with accessories
NAM (AT&T) Cellular, no accessories
LTE, UMTS/HSPA+, GPRS/EDGE
Modbus Commands Supported
01 Read Coil Status
02 Read Input Status
03 Read Holding Registers
Online Download
www.advantech.com/products
All product specifications are subject to change without notice.
Last updated: 9-Aug-2017