Rosemount™ 975 Flame Detectors
Modbus® Manager Manual
Reference Manual
00809-1500-4975, Rev AA
June 2021
Legal notice
The device described in this document is the property of Emerson.
No part of the hardware, software, or documentation may be reproduced, transmitted, transcribed, stored in a retrieval system,
or translated into any language or computer language, in any form or by any means, without prior written permission from
Emerson.
While great efforts have been made to ensure the accuracy and clarity of this document, Emerson assumes no liability resulting
from any omissions in this document or from misuse of the information obtained herein. The information in this document has
been carefully checked and is believed to be entirely reliable with all of the necessary information included. Emerson reserves the
right to make changes to any products described herein to improve reliability, function, or design and reserves the right to revise
this document and make changes from time to time in content hereof with no obligation to notify any persons of revisions or
changes. Emerson does not assume any liability arising out of the application or any use of any product or circuit described herein;
neither does it convey license under its patent rights or the rights of others.
WARNING
All individuals who have or will have responsibility for using, maintaining, or servicing this product must read this document
carefully.
WARNING
Physical access
Unauthorized personnel may potentially cause significant damage to and/or misconfiguration of end users’ equipment. This could
be intentional or unintentional and needs to be protected against.
Physical security is an important part of any security program and fundamental to protecting your system. Restrict physical access
by unauthorized personnel to protect end users’ assets. This is true for all systems used within the facility.
CAUTION
Equipment damage
This device is not field repairable due to the meticulous alignment and calibration of the sensors and the respective circuits.
Modifying or repairing the internal circuits may impair the system's performance and void the Emerson product warranty.
Do not attempt to modify or repair the internal circuits or change their settings.
Warranty
1. Limited Warranty . Subject to the limitations contained in Section 2 (Limitation of Remedy and Liability) herein, Seller
warrants that (a) the licensed firmware embodied in the Goods will execute the programming instructions provided by
Seller; (b) that the Goods manufactured by Seller will be free from defects in materials or workmanship under normal use
and care; and (c) Services will be performed by trained personnel using proper equipment and instrumentation for the
particular Service provided. The foregoing warranties will apply until the expiration of the applicable warranty period.
Sensors and detectors are warranted against defective parts and workmanship for 60 months from the date of purchase.
Products purchased by Seller from a third party for resale to Buyer (Resale Products) shall carry only the warranty
extended by the original manufacturer. Buyer agrees that Seller has no liability for Resale Products beyond making a
reasonable commercial effort to arrange for procurement and shipping of the Resale Products. If Buyer discovers any
warranty defects and notifies Seller thereof in writing during the applicable warranty period, Seller shall, at its option, (i)
correct any errors that are found by Seller in the firmware or Services; (ii) repair or replace FOB point of manufacture that
portion of the Goods found by Seller to be defective; or (iii) refund the purchase price of the defective portion of the
Goods/Services. All replacements or repairs necessitated by inadequate maintenance; normal wear and usage; unsuitable
power sources or environmental conditions; accident; misuse; improper installation; modification; repair; use of
unauthorized replacement parts; storage or handling; or any other cause not the fault of Seller, are not covered by this
limited warranty and shall be replaced or repaired at Buyer's sole expense, and Seller shall not be obligated to pay any
costs or charges incurred by Buyer or any other party except as may be agreed upon in writing in advance by Seller. All
costs of dismantling, reinstallation, freight, and the time and expenses of Seller's personnel and representatives for site
travel and diagnosis under this limited warranty clause shall be borne by Buyer unless accepted in writing by Seller. Goods
repaired and parts replaced by Seller during the warranty period shall be in warranty for the remainder of the original
warranty period or 90 days, whichever is longer. This limited warranty is the only warranty made by Seller and can be
amended only in a writing signed by an authorized representative of Seller. The limited warranty herein ceases to be
2
effective if Buyer fails to operate and use the Goods sold hereunder in a safe and reasonable manner and in accordance
with any written instructions from the manufacturers. THE WARRANTIES AND REMEDIES SET FORTH ABOVE ARE
EXCLUSIVE. THERE ARE NO REPRESENTATIONS OR WARRANTIES OF ANY KIND, EXPRESSED OR IMPLIED, AS TO
MERCHANTABILITY, FITNESS FOR PARTICULAR PURPOSE OR ANY OTHER MATTER WITH RESPECT TO ANY OF THE GOODS
OR SERVICES.
2. Limitation of Remedy and Liability SELLER SHALL NOT BE LIABLE FOR DAMAGES CAUSED BY DELAY IN PERFORMANCE. THE
REMEDIES OF BUYER SET FORTH IN THE AGREEMENT ARE EXCLUSIVE. IN NO EVENT, REGARDLESS OF THE FORM OF THE
CLAIM OR CAUSE OF ACTION (WHETHER BASED IN CONTRACT INFRINGEMENT, NEGLIGENCE, STRICT LIABILITY, OTHER
TORT, OR OTHERWISE), SHALL SELLER'S LIABILITY TO BUYER AND/OR BUYER'S CUSTOMERS EXCEED THE PRICE TO BUYER
OF THE SPECIFIC GOODS MANUFACTURED OR SERVICES PROVIDED BY SELLER GIVING RISE TO THE CLAIM OR CAUSE OF
ACTION. BUYER AGREES THAT IN NO EVENT SHALL SELLER'S LIABILITY TO BUYER AND/OR BUYER'S CUSTOMERS EXTEND
TO INCLUDE INCIDENTAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES. THE TERM "CONSEQUENTIAL DAMAGES" SHALL
INCLUDE, BUT NOT BE LIMITED TO, LOSS OF ANTICIPATED PROFITS, REVENUE OR USE AND COSTS INCURRED INCLUDING
WITHOUT LIMITATION FOR CAPITAL, FUEL AND POWER, AND CLAIMS OF BUYER'S CUSTOMERS.
Technical support
To get technical support for this product, contact your local Rosemount representative or the Rosemount Technical Support
department at +1 866 347 3427 or safety.csc@emerson.com
Abbreviations and acronyms
Abbreviation or acronym Definition
ATEX Atmospheric explosives
AWG American wire gauge
BIT Built-in test
EMC Electromagnetic compatibility
EOL End of line
FOV Field of view
®
HART
Highway addressable remote transducer - communication protocol
IAD Immune at any distance
IECEx International Electrotechnical Commission Explosion
IPA Isopropyl alcohol
IR Infrared
JP5 Type of jet fuel
Latching Refers to relays remaining in the ON state even after the ON condition has been
removed.
LED Light emitting diode
LPG Liquified petroleum gas
mA Milliamps (0.001 amps)
®
Modbus
Master-slave messaging structure
N.C. Normally closed
N.O. Normally open
N/A Not applicable
NFPA National Fire Protection Association
NPT National pipe thread
PN Part number
SIL Safety integrity level
3
Abbreviation or acronym Definition
UNC Unified coarse thread
Vac Volts alternating current
Vdc Volts direct current
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Reference Manual Contents
00809-1500-4975 June 2021
Contents
Chapter 1 Introduction.............................................................................................................. 7
1.1 Product overview.........................................................................................................................7
1.2 Minimum requirements...............................................................................................................7
Chapter 2 Initial setup................................................................................................................9
2.1 Download software......................................................................................................................9
2.2 Running the software...................................................................................................................9
2.3 Connect computer to the device..................................................................................................9
2.4 Connect device to harness cable................................................................................................10
2.5 Connect D-type socket to end of cable.......................................................................................10
2.6 Set up USB adapter.................................................................................................................... 10
2.7 Establish the COM port.............................................................................................................. 11
2.8 Connecting the device...............................................................................................................12
Chapter 3 Operation................................................................................................................ 13
3.1 Screen overview.........................................................................................................................13
3.2 Perform manual BIT................................................................................................................... 15
3.3 Assign address to device............................................................................................................16
3.4 Switch device address................................................................................................................16
3.5 Locating the detector address....................................................................................................17
3.6 Status screen............................................................................................................................. 17
3.7 Trend screen..............................................................................................................................18
3.8 Recording screen.......................................................................................................................19
3.9 Detector setup...........................................................................................................................21
Chapter 4 Maintenance............................................................................................................27
4.1 Miscellaneous functions.............................................................................................................27
4.2 Update firmware........................................................................................................................27
4.3 Parameter update......................................................................................................................27
4.4 Set fixed current 4-20 values......................................................................................................28
4.5 Parameter download................................................................................................................. 29
4.6 Version information...................................................................................................................29
4.7 Service functions....................................................................................................................... 29
Appendix A Reference data......................................................................................................... 31
A.1 Ordering information, specifications, and dimensional drawings...............................................31
A.2 Product certifications and installation drawings.........................................................................31
A.3 Failure status codes................................................................................................................... 31
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Contents Reference Manual
June 2021 00809-1500-4975
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Reference Manual Introduction
00809-1500-4975 June 2021
1 Introduction
1.1 Product overview
Modbus® Manager is a customized software based on Modbus and RS485, used to
configure the device to suit the customer needs, perform firmware upgrades and provide
troubleshooting information and functionality.
This guide describes the Modbus Manager and provides instructions on how to install,
operate, and maintain the software.
Note
The Modbus Manager software is for use with Rosemount 975 models only.
1.2 Minimum requirements
The minimum requirements for operating the Modbus Manager are as follows:
• Pentium® 3GHz
• Microsoft® Windows™ XP, 7, 8, or 10
• 2GB RAM
• 10GB hard disk free space
• Isolated RS-485 interface card to be defined as COM or an RS-485 converter to connect
to a standard COM port
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Introduction Reference Manual
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Reference Manual
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Initial setup
2 Initial setup
2.1 Download software
To download the Modbus® Manager, follow these steps:
Procedure
1. Go to Emerson.com/Rosemount.
2. Using the site navigation, go to the relevant product page
3. Scroll down to Documents and Drawings.
4. Click SOFTWARE DOWNLOADS & DRIVERS.
5. Download the relevant file.
2.2 Running the software
Once the software file has been downloaded to your computer, place it in a convenient
location
To run the software, double click on the executable file.
2.3 Connect computer to the device
Prerequisites
The computer must first be connected to the device using the RS485 harness cable before
performing any configuration or diagnostic operations on the device.
Procedure
1. Connect one end of the USB cable to the computer USB port.
2. Connect the other end of the USB cable to the USB serial (RS-485) adapter.
3. Connect the serial port of the adapter to the harness cable.
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Initial setup
June 2021 00809-1500-4975
Reference Manual
2.4 Connect device to harness cable
Procedure
1. Connect one side of the cable to detector Terminal 13 for RS-485 (+).
2. Connect the other side of the cable to detector Terminal 14 for RS-485 (-).
2.5 Connect D-type socket to end of cable
Procedure
1. Connect RS-485 (+) to Pin 2.
2. Connect RS-485 (-) to Pin 1.
3. Connect RTN to Pin 5.
2.6 Set up USB adapter
CAUTION
If using a different adapter than recommended, check that the D-connector adapter
wiring is similar to the wiring shown (if not, adjust the cable wiring to fit the desired
adapter).
Procedure
1. Unscrew the cover of the USB adapter.
2. Set up jumpers using one of the following options.
•
•
3. Close the USB adapter cover.
4. Connect the cable.
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Reference Manual Initial setup
00809-1500-4975 June 2021
2.7 Establish the COM port
Prerequisites
When first connecting the harness, you will be prompted to select a COM port.
Procedure
1. Open Modbus® Manager.
2. Select Device Manager.
3. Select Ports.
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Initial setup Reference Manual
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4. Note to which COM the USB Serial Port is connected (this will vary among
computers).
5. From the Comport dropdown, select the relevant COM port.
6. Click the OK button.
Once the port is set, a message displays that the Modbus Manager must be
restarted.
2.8 Connecting the device
The device must be connected to power and the RS485 should be connected to the
terminals according to the following table:
Function Wire color Terminal
RS485 (+) Red 13
RS485 (-) Black 14
Note
The detector address set by the factory is ‘1’. When locating the detector address, only
one detector should be connected.
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