DECLARATION OF CONFORMITY A printed version of the Declaration of Conformity has been provided separately within the original shipment of goods. However, you can find a copy of the latest version at http://www.mtl-inst.com/ certificates...
MTL646 IS PANEL MOUNTING SERIAL TEXT DISPLAY 1. DESCRIPTION The MTL646 is an intrinsically safe instrument that can display text and simple graphics in a hazardous area. Incorporating six operator switches, two solid state outputs and a backlit graphical display, it forms a simple operator interface for machine or process control applications.
3. INTRINSIC SAFETY CERTIFICATION and having a temperature classification of: 3.1 Apparatus certificate (ATEX) The MTL646 has been issued with EC-Type Examination Certificate ITS03ATEX21172 by Intertek Testing Services (ITS) confirming compliance with European ATEX at an ambient temperature between –40 C and 2014/34/EU Directive...
The certification label is fitted in a recess on the top outer surface of the enclosure. It shows the certification information plus the Eaton name, location, instrument serial number and year of manufacture. Other non-European certification information may also appear on this label.
4. SYSTEM DESIGN FOR HAZARDOUS When two MTL646 text displays are multi- AREAS dropped from a common galvanic isolator the There are three configurations that may be brilliance of both display backlights will be used for hazardous area installations. significantly reduced. choice depends upon how many text displays are required, the backlight brilliance and the communication speed required.
4.4 Four-wire system 5. INSTALLATION The four-wire system, which is defined by ITS 5.1 Location System Certificate Ex03E21196, allows communication at higher and lower rates than The MTL646 is housed in a robust aluminium the other two configurations. It should be used enclosure with a toughened glass window for applications requiring fast display updates, mounted in a Noryl bezel.
5.2 Installation Procedure 5.3 EMC The MTL646 complies with the requirements of a. Insert the MTL646 into the instrument the European EMC Directive 89/336/EEC. For panel cut-out from the front of the specified immunity all wiring should be in panel. screened twisted pairs.
6. CONFIGURATION correct the main menu will be displayed, if the Before the MTL646 can be commissioned it code is incorrect ‘Invalid access code’ will be must be configured to be compatible with the displayed. host’s communications format and have the required functions enabled.
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Address Access code for the Configuration Menu For multidrop applications each text display Defines the four digit alphanumeric code must be allocated a unique non-zero that must be entered to gain access to the address. Addresses may be set between 1 instrument configuration menus.
7. PROGRAMMING • Status of operator switches is encoded into A detailed description of the MTL programming the returned message, or can be explicitly protocol, together with examples of all the requested. instructions, are contained in the MTL646 & MTL647 Programming Guide which may be •...
a returns the key status Mode 3: 0=no key pressed As Mode 2 but the <CI> command is 1=key1 replaced by a <CCn> command where 2=key2 n is a single byte simple checksum of 3=key3 all characters sent (including spaces) 4=key4 up to, but not including the <CCn>...
7.6 Summary of Commands Commands are listed in functional groups. Detailed descriptions of each command including examples of how they should be used are included in the MTL646 & MTL647 Programming Guide which may be downloaded from www.mtl-inst.com 7.6.1 Screen handling and text Command Meaning Description...
Note: The Screen Defaults <SD> command returns the display and its attributes to a known state listed below. Display scroll off Key press data cleared Window definition cleared <VF0> Visible frame = 0 <AF0> Active frame = 0 <F1> Small font 8 x 6 Pixels <CS>...
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Command Meaning Description Text is left justified. Use with <WT> <LA> Left Align command. Window aware in Row Mode only. <LF> Line Feed Line feed added after carriage return. Row Mode only Text is written at the current cursor <NA> No Align position by the <wt>...
7.6.3 System commands Command Meaning Description Subsequent writes to the <AFn> Active Frame instrument are written to page frame n. n=0 or 1. Default is 0. Specifies a simple checksum (n) of <CCn> Check Code a previously sent command string. Operational Mode 3.
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Command Meaning Description Make Subsequent commands are <MCn> Connection addressed to the stated node. n=1 to n=15. <ODn> Switch Output Output n open circuit. n=1 or n=2. De-energised <OEn> Switch Output Output n short circuit. n=1 or n=2. Energised <PM> Pixel Mode Text is pixel aligned.
7.6.4 Line graphics Command Meaning Description Draws a box y length pixels high, x length pixels wide, and with a line width of l width pixels, from the <BDylength,xlength,lwidth> Box Draw current cursor position (up and to the right). Parameters can be any value that will keep the box being drawn on screen.
7.6.5 Pixel graphics Command Meaning Description Command is followed by a .BMP file Download <DG> download. See Graphics Download Graphic section. Pixel Mode only. Command is followed by a .BMP file Download <DS> download. See Graphics Download Screen section. Enables the screen dump command above.
• The image is drawn upwards from and to the right of the current cursor position. If any part of the image exceeds the display bounds the image is NOT displayed and an error response is returned. • The .BMP format must still be two colour, standard Windows (OS2) format.
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7.8.1 Procedure for generating a CRC Step 1 Load a 16-bit register with FFFF hex (all 1's). Call this the CRC register. Step 2 Exclusive OR the first eight-bit byte of the message with the low order byte of the 16-bit CRC register, putting the result in the CRC register.
8. MAINTENANCE 8.2 Fault finding after commissioning 8.1 Fault finding during commissioning ENSURE PLANT SAFETY BEFORE STARTING MAINTENANCE MTL646 fails function during commissioning the following procedure should Live maintenance is permitted on be followed: intrinsically safe equipment installed in a hazardous area, but only certified test equipment should be used unless Symptom Cause...
9. ACCESSORIES 9.1 Tag number The MTL646 can be supplied with a thermally printed tag number on the rear panel. This tag number is not visible from the front of the instrument after installation. 9.2 MTL646 & MTL647 Programming Guide A detailed guide to programming the MTL646 and MTL647 serial text displays may be downloaded...
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