Sierra 240-V, 240-VT, 240-VTP, 240-LP, 241-V, 241-VT, 241-VTP, 241-LP Instruction Manual
240/241 Series Modbus
Instruction Manual
Modbus Device Specification for Models:
240-V, -VT, -VTP, -LP & 241-V, -VT, -VTP, -LP
Multivariable Mass Vortex Flow Meters
Part Number: IM240/241 Modbus, Rev. V1
May 2013
GLOBAL SUPPORT LOCATIONS: WE ARE HERE TO HELP!
CORPORATE HEADQUARTERS
5 Harris Court, Building L Monterey, CA 93940
Phone (831) 373-0200 (800) 866-0200 Fax (831) 373-4402
www.sierrainstruments.com
EUROPE HEADQUARTERS
Bijlmansweid 2 1934RE Egmond aan den Hoef
The Netherlands
Phone +31 72 5071400 Fax +31 72 5071401
ASIA HEADQUARTERS
Second Floor Building 5, Senpu Industrial Park
25 Hangdu Road Hangtou Town
Pu Dong New District, Shanghai, P.R. China
Postal Code 201316
Phone: + 8621 5879 8521 Fax: +8621 5879 8586
IMPORTANT CUSTOMER NOTICE- OXYGEN SERVICE
Sierra Instruments, Inc. is not liable for any damage or personal injury, whatsoever, resulting from the use of Sierra Instruments
standard mass flow meters for oxygen gas. You are responsible for determining if this mass flow meter is appropriate for your
oxygen application. You are responsible for cleaning the mass flow meter to the degree required for your oxygen flow
application.
© COPYRIGHT SIERRA INSTRUMENTS 2012
No part of this publication may be copied or distributed, transmitted, transcribed, stored in a retrieval system, or translated
into any human or computer language, in any form or by any means, electronic, mechanical, manual, or otherwise, or
disclosed to third parties without the express written permission of Sierra Instruments. The information contained in this
manual is subject to change without notice.
TRADEMARKS
InnovaFlo® and InnovaMass® are trademarks of Sierra Instruments, Inc. Other product and company names listed in this
manual are trademarks or trade names of their respective manufacturers.
!
Warnings and Cautions
Warning!
nameplate for specific flow meter approvals before any hazardous location installation.
Warning!
manufacturer of the hot tap equipment and/or the contractor performing the hot tap is responsible for providing proof of such a
permit.
Warning!
Warning!
to a power source and to peripheral devices. Failure to do so could result in injury or death. All AC power connections must be in
accordance with published CE directives.
Warning!
sensors and/or damage to the electronics.
Warning!
Warning!
Agency approval for hazardous location installations varies between flow meter models. Consult the flow meter
Hot tapping must be performed by a trained professional. U.S. regulations often require a hot tap permit. The
All wiring procedures must be performed with the power off.
To avoid potential electric shock, follow National Electric Code safety practices or your local code when wiring this unit
Do not power the flow meter with the sensor remote (if applicable) wires disconnected. This could cause over-heating of the
Before attempting any flow meter repair, verify that the line is de-pressurized.
Always remove main power before disassembling any part of the mass flow meter.
Caution!
control system. Adjustments to the electronics will cause direct changes to flow control settings.
Before making adjustments to the device, verify the flow meter is not actively monitoring or reporting to any master
Caution!
as the main pipeline.
Caution!
You cannot add or subtract wire length without returning the meter to the factory for re-calibration.
Caution!
before installing the meter.
Caution!
Caution!
precautions to minimize the risk of damage:
All flow meter connections, isolation valves and fittings for hot tapping must have the same or higher pressure rating
Changing the length of cables or interchanging sensors or sensor wiring will affect the accuracy of the flow meter.
When using toxic or corrosive gases, purge the line with inert gas for a minimum of four hours at full gas flow
The AC wire insulation temperature rating must meet or exceed 80°C (176°F).
Printed circuit boards are sensitive to electrostatic discharge. To avoid damaging the board, follow these
before handling the assembly, discharge your body by touching a grounded, metal object
handle all cards by their edges unless otherwise required
when possible, use grounded electrostatic discharge wrist straps when handling sensitive components
Warning!
Caution!
This statement appears with information that
is important to protect people and equipment
from damage. Pay very close attention to all
warnings that apply to your application.
This statement appears with information that is
important for protecting your equipment and
performance. Read and follow all cautions that
apply to your application.
!
Note and Safety Information
We use caution and warning statements throughout this book to draw your attention to important
information.
Receipt of System Components
When receiving a Sierra mass flow meter, carefully check the outside
packing
carton for damage
incurred in shipment. If the carton is damaged, notify the local carrier and submit a report to the
factory or distributor. Remove the packing slip and check that all ordered components are present.
Make sure any spare parts or accessories are not discarded with the packing material. Do not
return any equipment to the factory without first contacting Sierra Customer Service
.
Technical Assistance
If you encounter a problem with your flow meter, review the configuration information for each
step of the installation, operation, and setup procedures. Verify that your settings and adjustments
are consistent with factory recommendations. Installation and troubleshooting information can be
found in the 240/241 Series Product Instruction Manual.
If the problem persists after following the troubleshooting procedures outlined in the 640S or 780S
product manuals, contact Sierra Instruments by fax or by E-mail (see inside front cover). For
urgent phone support you may call (800) 866-0200 or (831) 373-0200 between 8:00 a.m. and 5:00
p.m. PST. In Europe, contact Sierra Instruments Europe at +31 20 6145810. In the Asia-Pacific
region, contact Sierra Instruments Asia at +
make sure to include this information:
The flow range, serial number, and Sierra order number (all marked on the meter
nameplate)
The software version (visible at start up)
The problem you are encountering and any corrective action taken
Application information (gas, pressure, temperature and piping configuration)
86-21-58798521.
When contacting Technical Support,
4
Table of Contents
T
Table of Contents .................................................................................................................... …….5
Chapter 1: Modbus Communications… .........................................................................................6
Applicable Flow Meter Models ................................................................................................................................... 6
Wiring......................................................................................................................................................................... 6
Pin Labeling (among devices).................................................................................................................................... 7
Menu Items ................................................................................................................................................................ 7
Address...................................................................................................................................................................... 7
Comm Protocol .......................................................................................................................................................... 7
Modbus Units ............................................................................................................................................................. 8
Modbus Order ............................................................................................................................................................ 8
Modbus Protocol ........................................................................................................................................................ 8
Register Definitions .................................................................................................................................................... 9
Exception Status Definitions .................................................................................................................................... 11
Discrete Input Definitions ......................................................................................................................................... 11
Control Register Definitions ..................................................................................................................................... 11
Error Responses ...................................................................................................................................................... 11
Command Message Format .................................................................................................................................... 12
Normal Response Message Format ........................................................................................................................ 12
Exception Response Message Format .................................................................................................................... 12
Examples ................................................................................................................................................................. 12
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