Related Manuals for Eaton MTL83*C Modbus
Summary of Contents for Eaton MTL83*C Modbus
- Page 1 DRAFT - 06 January 2019 Instruction manual January 2019 MTL fieldbus networks INM MTL83xC PC Modbus Rev 1 MTL83xC Modbus PC software manual...
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Page 3: Table Of Contents
DRAFT - 06 January 2019 CONTENTS INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1 .1 PC Requirements . - Page 4 DRAFT - 06 January 2019 This page left intentionally blank INM MTL83xC PC Modbus Rev 1...
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Page 5: Introduction
DRAFT - 06 January 2019 INTRODUCTION The MTL83xC is a temperature (and mV) measuring system. It consists of an MTL838C and one or two MTL831C modules. See the datasheet EPS830C and installation manuals INM838C and INM831C for these modules for further details. -
Page 6: Quickstart Guide
DRAFT - 06 January 2019 QUICKSTART GUIDE This quickstart guide is written for an MTL83xC system based on an MTL831C temperature input multiplexer transmitter with an MTL838C multiplexer receiver. Before the actual installation, it is recommended that new users initially set up a simple system on the bench to become familiar with the MTL83xC system. -
Page 7: Background To The Mtl838C
DRAFT - 06 January 2019 BACKGROUND TO THE MTL838C 3 .1 The analog-input multiplexer system The MTL838C is an analog multiplexer receiver that is used with the MTL831C hazardous area millivolt input multiplexer transmitter. The status of up to 32 analog inputs may be communicated from the hazardous area to the safe area via a data highway, comprised of a simple twisted pair - over distances up to 2000m. -
Page 8: On-Line Configuration
DRAFT - 06 January 2019 3 .3 On-line Configuration Configuring the unit via the Modbus master and the network might seem to be the simplest method at first sight, but there are a number of practical difficulties with this configuration technique. This approach means that the user must deal with a number of complex aspects which require a significant investment of the configurer’s time before they are understood fully. -
Page 9: Interconnection Of The Mtl838C
DRAFT - 06 January 2019 3 .6 Interconnection of the MTL838C The MTL838C may be connected to a Modbus host in a number of ways. Two RS485 outputs, Link 1 and Link 2, are provided on the MTL838C. As there are two outputs the unit can either be connected to a single Modbus master, with dual redundancy, or connected to two separate Modbus hosts. -
Page 10: Addressing The Transmitters Of Each Mtl838C
DRAFT - 06 January 2019 3 .8 .2 Addressing the transmitters of each MTL838C Each MTL831C transmitter accepts up to 16 sensor inputs and there can be one or two MTL831C transmitters connected to a single MTL838C. The address of the MTL831C as seen by the MTL838C is determined by whether a jumper wire is installed on the MTL831C. -
Page 11: Pc Software Installation
DRAFT - 06 January 2019 PC SOFTWARE INSTALLATION The MTL83xC Configuration Software is only available from the Eaton (MTL) website. Direct your browser to the following website and then locate the MTL83xC product page. There will be a link on that page to download and install the software: www.mtl-inst.com... -
Page 12: Software Operation
DRAFT - 06 January 2019 SOFTWARE OPERATION This section covers the operation of the MTL83xC Configurator software. For detailed operation of the hardware, please see the relevant installation manuals. The following is the screen that appears when the software opens: Figure 2 - The MTL838C Tab This is a standard Windows application that incorporates a typical Menu system and Tabs to organize the information. -
Page 13: Configuration Overview
DRAFT - 06 January 2019 After connecting a USB cable to the MTL838C and providing it power, the Connection Status changes to: Figure 3 - Connection status This Connection Status indicates that the PC software is communicating over the USB cable with the MTL838C – both LEDs are ON and the MTL838C word is green. The MTL838C is not communicating with the MTL831Cs in the above image. -
Page 14: The Mtl838C Tab
DRAFT - 06 January 2019 5 .2 The MTL838C Tab The items on this tab allow you to configure the MTL838C. Some of these parameters affect the entire system – others only specific aspects of the MTL838C. We will cover them in detail below: 5 .2 .1 Communication Protocol Two communication protocols for the RS485 Links are supported by the MTL838C. -
Page 15: Tag Name
DRAFT - 06 January 2019 5 .2 .3 Tag Name This field is user defined. When properly filled in it may be used to identify this particular MTL838C in the plant. It is available via the Modbus interface as well. Up to 24 alphanumeric characters may be entered in this field. The field is blank by default. -
Page 16: Temperature Units
DRAFT - 06 January 2019 5 .2 .7 Temperature Units Select the Units that should be used to report temperature. The dropdown allows for Celsius (the default), Fahrenheit, or Kelvin. 5 .2 .8 Baud Rate Select the Baud rate for the two RS485 Links. 9600 is the default. 5 .2 .9 Line Frequency The line frequency where the MTL83xC system is installed should be correctly selected from this dropdown box. -
Page 17: Alarm Relay 1
DRAFT - 06 January 2019 5 .2 .11 Alarm Relay 1 There are 10 alarm conditions that can be used to trigger the alarm relay. If multiple conditions are selected, then they are logically OR’d together. Check the checkbox of the condition(s) that you want to trigger the alarm. The gray box to the left of the checkbox indicates the way the currently connected MTL838C is configured. -
Page 18: Alarm Relay 2
DRAFT - 06 January 2019 5 .2 .12 Alarm Relay 2 See the explanation for Alarm Relay 1. The possible settings for both alarm relays are the same. However, you can set each relay differently to get different errors to trip the two relays. -
Page 19: Input Type
DRAFT - 06 January 2019 5 .3 .1 Input Type This dropdown is used to select the type of sensor that is connected to the channel. The following are the different options available. 2W RTD Ω 3W RTD Ω 4W RTD Ω 2W RTD Cu50 3W RTD Cu50 4W RTD Cu50... -
Page 20: Input Zero, Output Zero, Gain
DRAFT - 06 January 2019 5 .3 .5 Input Zero, Output Zero, Gain These three fields are used to scale the reading that is made available via Modbus. These fields are normally used with non-IEEE data formats. See the chapter on SCALING in the INM838C-MBF manual for more information. -
Page 21: Action Buttons
DRAFT - 06 January 2019 5 .4 Action Buttons At the bottom of the channel area, there are four (4) buttons. Only one of them is active (blue) because there is no MTL838C currently communicating. This is the Reset Configs button. If pressed, it will reset all 16 channels in the current tab to their defaults –... - Page 22 DRAFT - 06 January 2019 Figure 5 Figure 6 INM MTL83xC PC Modbus Rev 1...
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Page 23: Input Calculator
DRAFT - 06 January 2019 5 .5 Input Calculator The Input Calculator is used to assist in calculating the Input Zero, Output Zero, and Gain values. The calculator is shown below: Enter the appropriate data in the top 4 fields. As you do this and tab or move from one field to the other, the values in the gray boxes are updated. -
Page 24: The Mtl831C #2 Tab
DRAFT - 06 January 2019 5 .6 The MTL831C #2 Tab This tab functions exactly the same as the MTL831C #1 tab. The only difference is that it contains the configuration data for the #2 MTL831C. The channel numbers are different so the Modbus system can distinguish the two units. MTL831 #1 shows up as channels 1-16 and MTL831 #2 shows up as channels 17-32. -
Page 25: The Menu
DRAFT - 06 January 2019 THE MENU At the top of the MTL83xC Configurator window is a menu that contains the following items: File, Edit, Devices, and Help. Click on the menu name to drop its menu down and then click on the menu item to execute that function. The Menu items are explained below. -
Page 26: Edit
DRAFT - 06 January 2019 The default file name is “Configs.txt” . Change its name to something more meaningful and press the Save button. We recommend keeping the “ .txt” file type so the program can easily access the files. Also, although these are text files which are easily viewed and manipulated by standard Windows software, we do not recommend altering them in this manner. -
Page 27: Devices
DRAFT - 06 January 2019 This allows you to confirm your intention to clear all configuration data to the defaults. Press OK to continue with the reset or Cancel to abort. 6 .3 Devices The Devices menu contains functions specific to the MTL83xC devices. The first three are commands to reset the respective pieces of hardware and the fourth item launches the window allowing firmware updates of the connected devices. - Page 28 If a unit is not connected, then the version information is blank (as is the case above with the MTL831C #2). The latest firmware will be available on the Eaton (MTL) website www .mtl-inst .com . If you suspect that the unit has become corrupted (functionally –...
- Page 29 If any errors occur, they will be displayed at the bottom of the window. If you get an error, try again. If that is unsuccessful, contact Eaton (MTL) for assistance. Notice that update process for the MTL831C will update ALL MTL831Cs connected to the MTL838C.
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Page 30: Help
This is where you can find the version of the PC software that you are currently running. The latest version will be on the Eaton (MTL) website at www .mtl-inst .com . We recommend using the latest version. Download and install from the website. - Page 31 DRAFT - 06 January 2019 Initially the request for diagnostic data from the MTL83xC system is OFF as indicated by the red Toggle Reading button and no diagnostic data (numbers) being listed. To begin receiving diagnostic data, press the Toggle Reading button. It will change to a green color and data from the units will be received.
- Page 32 DRAFT - 06 January 2019 There are some errors shown in the example above. This is because the MTL831C #1 was disconnected from the Data Highway and then re-connected. It is typical in this case to see a few errors. The Bad and Fragment packets received at the MTL838C are due to Data Highway transitions due to unplugging and plugging in the MTL831C #1.
- Page 33 DRAFT - 06 January 2019 Modbus Errors Link 1 (or 2) Unknown function The Modbus Host sent a function code not supported by the MTL838C CRC Error A CRC error occurred on a Modbus packet. Data is put in a buffer while waiting for the UART to Cannot send –...
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- Page 36 MTL Instruments GmbH, Heinrich-Hertz-Str. 12, 50170 Kerpen, Germany UNITED ARAB EMIRATES Cooper Industries/Eaton Corporation Tel: +49 (0)22 73 98 12 - 0 Fax: +49 (0)22 73 98 12 - 2 00 Office 205/206, 2nd Floor SJ Towers, off. Old Airport Road, E-mail: csckerpen@eaton.com...