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4/18/2011 Page 1 of 8

SignalFire Telemetry - Rev 5.0

SFRSS Modbus-in-a-Stick Instruction Sheet

The SignalFire Modbus-in-a-Stick has the following features:

• RS485 connection to Modbus devices

• Wide range DC power input. 6 to 40VDC

• Configurable check-in period and Network address

• Configurable Modbus register polling and/or transparent register mode

• Modbus register writes to remote nodes

• Full time mesh node can forward messages from other SignalFire devices

including sleeping nodes.

• Sends data to a SignalFire Modbus Gateway

• Integrated 500mW FHSS 900MHz ISM band radio and high gain antenna

Modbus-in-a-Stick Connections

The Modbus- in-a-stick is supplied with a 6 conductor cable. The connections are as

follows:

Wire Color Connection

RED

Positive Power (6 to 40 VDC)

BLACK

Ground

GREEN

RS-485 “A”, 9600 Baud default

BROWN

RS-485 “B”, 9600 Baud default

ORANGE

RS-232 Debug/Programming TX, 9600 Baud

YELLOW

RS-232 Debug/Programming RX, 9600 Baud

Status LED

The Modbus- in-a-stick has one LED available for field diagnostics.

LED Description

Slow Flash (3 second pause)

System is running and in communication with radio network

Fast Flash (0.5 second pause)

System is running but no network found

Solid On

System Fault, needs service.

Summary of content (8 pages)

PAGE 1
4/18/2011 Page 1 of 8 SFRSS Modbus-in-a-Stick Instruction Sheet The SignalFire Modbus-in-a-Stick has the following features: • • • • • • • • RS485 connection to Modbus devices Wide range DC power input. 6 to 40VDC Configurable check-in period and Network address Configurable Modbus register polling and/or transparent register mode Modbus register writes to remote nodes Full time mesh node can forward messages from other SignalFire devices including sleeping nodes.
PAGE 2
4/18/2011 Page 2 of 8 Operating Modes The Modbus-in-a-Stick supports two modes of operation, a preconfigured register set, and an automatic scanning “transparent” mode. The Modbus stick can be used in either mode or a combination depending on the system requirements. Pre-Configured Register set mode This mode of operation is most useful for large data sets, and frequent polling of a set register map.
PAGE 3
4/18/2011 Page 3 of 8 Setup The Modbus-in-a-Stick requires initial configuration over the debug port. The supplied SignalFire Modbus Configurator PC application will be used to configure the device over the serial port.
PAGE 4
/18/2011 Page 4 of 8 The unit is configured using a PC Windows configuration application shown below: Network Setting The network address can be used to create multiple networks using multiple gateways (that are in close proximity with one another). The network setting must be the same on all units in the network including the gateway. System Check-In Period This setting controls how often the node will read the Modbus device and forward the register data to the gateway.
PAGE 5
4/18/2011 Page 5 of 8 it is converted to the HEX modbus command. Modbus Write Register Instructions The Modbus Master device will issue a standard Modbus protocol command in RTU format to the Gateway. The register write command will be automatically forwarded over the air to the remote modbus device.
PAGE 6
4/18/2011 Page 6 of 8 Remote Modbus Register Mapping Modbus Registers In addition to any pre-configured registers, the Modbus Stick will send system information in 16-bit registers in the table below. This data is accessible at any of the one of more Slave ID’s connected the Modbus Stick.
PAGE 7
4/18/2011 Page 7 of 8 Modbus-in-a-Stick Serial Configuration and Debug Commands The following table contains a list of useful configuration and debug commands that can be issued over the RS-232 connection from a standard terminal program such as Putty. Command radio network X checkin radio show radio reset reboot info scan scan show Description Sets the radio network to X. Generally from 16 to 23.
PAGE 8
4/18/2011 Page 8 of 8 APPENDIX - FCC and IC Statements Changes or modifications not expressly approved by SignalFire Telemetry, Inc could void the user’s authority to operate the equipment. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.