background image

OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords our 

customers the latest in technology and engineering.
OMEGA is a trademark of OMEGA ENGINEERING, INC.
© Copyright 2018 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied, 

reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the prior 

written consent of OMEGA ENGINEERING, INC.

FOR 

WARRANTY

 RETURNS, please have the  

following information available BEFORE contacting 

OMEGA:
1.   Purchase Order number under which the product 

was PURCHASED,

2.   Model and serial number of the product under 

warranty, and

3.  Repair instructions and/or specific problems  

  relative to the product.

FOR 

NON-WARRANTY

 REPAIRS, consult 

OMEGA for current repair charges. Have 

the following information available BEFORE 

contacting OMEGA:
1.  Purchase Order number to cover the COST  

  of the repair,
2.  Model and serial number of the product, and
3.  Repair instructions and/or specific problems  

  relative to the product.

RETURN REQUESTS/INQUIRIES

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE 

RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN (AR) 

NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID PROCESSING 

DELAYS). The assigned AR number should then be marked on the outside of the return package and on any 

correspondence.
The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent 

breakage in transit.

WARRANTY/DISCLAIMER

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a 

period of 

13 months

 from date of purchase. OMEGA’s WARRANTY adds an additional one (1) month grace 

period to the normal 

one (1) year product warranty

 to cover handling and shipping time. This ensures 

that OMEGA’s customers receive maximum coverage on each product.
If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service 

Department will issue an Authorized Return (AR) number immediately upon phone or written request. 

Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no 

charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser, 

including but not limited to mishandling, improper interfacing, operation outside of design limits,  

improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of  

having been tampered with or shows evidence of having been damaged as a result of excessive corrosion; 

or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating 

conditions outside of OMEGA’s control. Components in which wear is not warranted, include but are not  

limited to contact points, fuses, and triacs.

OMEGA is pleased to offer suggestions on the use of its various products. However,  

OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for 

any damages that result from the use of its products in accordance with information provided 

by OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by the 

company will be as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR  

REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESSED OR IMPLIED, EXCEPT THAT OF 

TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY 

AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF  

LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of  

OMEGA with respect to this order, whether based on contract, warranty, negligence,  

indemnification, strict liability or otherwise, shall not exceed the purchase price of the  

component upon which liability is based. In no event shall OMEGA be liable for 

 

consequential, incidental or special damages.

CONDITIONS:  Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic 

Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical 

applications or used on humans. Should any Product(s) be used in or with any nuclear installation or 

activity, medical application, used on humans, or misused in any way, OMEGA assumes no responsibility 

as set forth in our basic WARRANTY/DISCLAIMER language, and, additionally, purchaser will indemnify 

OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the 

Product(s) in such a manner.

Summary of Contents for DRST-CM

Page 1: ...e mail info omega com For latest product manuals www omegamanual info DRST CM Communication Enabler TM Shop online at omega com User sGuide ...

Page 2: ...specifications without notice omega com info omega com Servicing North America U S A Omega Engineering Inc Headquarters Toll Free 1 800 826 6342 USA Canada only Customer Service 1 800 622 2378 USA Canada only Engineering Service 1 800 872 9436 USA Canada only Tel 203 359 1660 Fax 203 359 7700 e mail info omega com For Other Locations Visit omega com worldwide ...

Page 3: ...ection 3 Safety Instructions 6 Section 4 Applications 7 Section 5 Technical Characteristics 7 Section 6 Mounting Installation Programming 8 Section 7 Mounting on a DRST device 8 Section 8 Order 8 Section 9 Electrical Specifications 9 10 Section 10 Modbus Parameter settings 11 12 Section 11 Modbus Settings Routing Diagram 13 14 ...

Page 4: ...ction provided by the equipment may be impaired GENERAL WARNING Until the device is fixed do not connect hazardous voltages to the device The following operations should only be carried out on a disconnected device and under ESD safe conditions General mounting connection and disconnection of Modbus cable Troubleshooting the device HAZARD OUS VOLTAGE Triangle with an exclamation mark Read the manu...

Page 5: ...ltages must be carried out according to the specifications of this manual The technician must use tools and instruments that are safe to use Cleaning When disconnected the device may be cleaned with a cloth moistened with distilled water IECEx ATEX installation in Zone 2 IECEx DEK 13 0026 X Ex nA IIC T5 Gc DEKRA 13ATEX0098 X II 3 G Ex nA IIC T5 Gc For safe installation the following must be observ...

Page 6: ... DRST CM display can be used to read the process signal simulate the output signal indicate sensor errors and internal module errors Section 5 Technical Characteristics DRST CM has full DRSL DISPLAY functionality for unit programming process signal monitoring and diagnostics handling Modbus RTU protocol is supported using a serial RS 485 communication wiring Multidrop half duplex connection via sh...

Page 7: ...e LCD dot display Line 1 can e g show the scaled process value Line 2 can e g show the selected engineering unit Line 3 can e g show the analog output or TAG no Line 4 shows status for communication and e g signal trending RJ45 Modbus Connector Pin 5 RS485 A line Pin 4 RS485 B line Pin 8 RS485 GND and shield Section 8 Order Type Description DRST CM DRSL DISPLAY Communication enabler Configmate int...

Page 8: ... response time 50 Hz 20 ms Signal type RS 485 half duplex Serial protocol Modbus RTU Modbus mode RTU slave Devices on an RS485 line Up to 32 without a repeater Data rates baud 2400 4800 9600 19200 38400 57600 115200 Automatic baudrate detection Yes can be configured ON or OFF Parity Even Odd None Stop bit s 1 or 2 Digital adressing 1 247 Response delay 0 1000 ms Approvals EMC 2004 108 EC EN 61326 ...

Page 9: ...ST DRST DRST DRST CM DRST CM IP54 DRST DRST DRST DRST CM DRST CM DRST CM DRST DISPLAY DRST CM DRST CM DRST CM T T T Modbus RTU Zone 2 Cl 1 Div 2 gr A D Safe Area Modbus RTU Gateway Gateway Modbus RTU Ethernet Modbus TCP IP PLC DCS HMI PC PLC DCS HMI PC Modbus RTU PLC DCS HMI PC Access Point ...

Page 10: ...cepted by all slaves but numbers 1 247 are addresses of specific devices With the exception of broadcast messages a slave device always responds to a Modbus message so the master knows the message was received DRST CM Supported Modbus Function Codes The Function Code defines the command that the slave device is to execute such as read data accept data report status Some function codes have subfunc...

Page 11: ...onse delay 0 1000 ms 0 ms default Modbus slave addressing range 1 247 247 default address Modbus Parameter Storage Saved in non volatile memory in the DRST CM device Factory Default Values are marked in bold Modbus RTU segment line termination A 120 Ohm resistor should be installed on both ends of a RS485 Modbus RTU segment loop to prevent signal echoes from corrupting data on the line DRST CM Mod...

Page 12: ...rticular device Omega A S DRST CM Local Menu xlsx DRST CM local submenu V0R9 Monitor SCROLLING HELPTEXTS 40 0 0000 correct No No xxxx 1 Set correct password OK PASSW OK ADV SET OK XXXX 2 Enter advanced setup menu 10 4mA 1 2 Yes x 3 Enter Language setup o V Enter Password setup v v v Enter Simulation mode 9999 YES Perform Process calibration 0000 NO Enter Display setup Perform Memory operations MEM...

Page 13: ...5 No Returns to Monitor upon succesful Modbus write command OFF STATUS 1 v YES NO STATUS 1 Only if automatic baudrate detection is enabled ORIEN NO ROT DEV OK Monitor 13 The gray shaded menus texts are only shown for guidance and are not part of the DRST CM specific submenu The Modbus submenu is located somewhere in the menu structure of any host device supporting DRST CM The actual place is defin...

Page 14: ...GA if the unit is found to be defective it will be repaired or replaced at no charge OMEGA s WARRANTY does not apply to defects resulting from any action of the purchaser including but not limited to mishandling improper interfacing operation outside of design limits improper repair or unauthorized modification This WARRANTY is VOID if the unit shows evidence of having been tampered with or shows ...

Page 15: ...rs M U Turbine Paddlewheel Systems M U Totalizers Batch Controllers pH CONDUCTIVITY M U pH Electrodes Testers Accessories M U Benchtop Laboratory Meters M U Controllers Calibrators Simulators Pumps M U Industrial pH Conductivity Equipment DATA ACQUISITION M U Communications Based Acquisition Systems M U Data Logging Systems M U Wireless Sensors Transmitters Receivers M U Signal Conditioners M U Da...

Reviews: