ProSoft MVI56E-GEC User Manual

Controllogix platform generic ascii ethernet communication module
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MVI56E-GEC
ControlLogix Platform
Generic ASCII Ethernet
Communication Module
February 24, 2020
USER MANUAL

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Summary of Contents for ProSoft MVI56E-GEC

  • Page 1 MVI56E-GEC ControlLogix Platform Generic ASCII Ethernet Communication Module February 24, 2020 USER MANUAL...
  • Page 2: Your Feedback Please

    Neither ProSoft Technology nor any of its affiliates or subsidiaries shall be responsible or liable for misuse of the information contained herein. Information in this document including illustrations, specifications and dimensions may contain technical inaccuracies or typographical errors.
  • Page 3: Important Installation Instructions

    Shock: 30 g, operational; 50 g, non-operational; Vibration: 5 g from 10 Hz to 150 Hz  Relative Humidity: 5% to 95% (without condensation)  All phase conductor sizes must be at least 1.3 mm and all earth ground conductors must be at least 4 mm Agency Approvals & Certifications Please visit our website: www.prosoft-technology.com...
  • Page 4: Table Of Contents

    Ladder Logic ..................26 3.2.1 Exporting the MVI56E-GEC .L5X File ..........26 3.2.2 Importing the MVI56E-GEC .L5X file Into an Studio 5000 Project ..28 Optional Add-On Instruction ............... 31 3.3.1 Setting Up the Optional AOI ............... 33 Sending and Receiving ASCII Data Sending ASCII Data ................
  • Page 5 Viewing Module Information ............... 44 5.2.3 Monitoring Backplane Information ............45 5.2.4 Monitoring MVI56E-GEC Server X Information ........46 5.2.5 Monitoring MVI56E-GEC Client X Information ........47 MVI56E-GEC Status Controller Tags ..........48 Connecting to the Module’s Webpage ..........51 Reference Product Specifications ................
  • Page 6: Start Here

    (firmware version 10 or higher), with compatible power supply, and one free slot in the rack for the MVI56E-GEC module. The module requires 800 mA of available 5 VDC power and 3 mA of available 24 VDC power. ...
  • Page 7: Package Contents

    Installing ProSoft Configuration Builder Software You must install the ProSoft Configuration Builder (PCB) software to configure the module. You can always get the newest version of ProSoft Configuration Builder from the ProSoft Technology website. Installing ProSoft Configuration Builder from the ProSoft website Open your web browser and navigate to http://www.prosoft-...
  • Page 8: Installing The Module In The Rack

    Installing the Module in the Rack If you have not already installed and configured your ControlLogix processor and power supply, please do so before installing the MVI56E-GEC module. Refer to your Rockwell Automation product documentation for installation instructions. Warning: You must follow all safety instructions when installing this or any other electronic devices.
  • Page 9: Opening The Sample Ladder Logic

    User Manual Opening the Sample Ladder Logic The sample program for your MVI56E-GEC module includes custom tags, data types and ladder logic for data I/O and status monitoring. For most applications, you can run the sample ladder program without modification, or, for advanced applications, you can incorporate the sample program into your existing application.
  • Page 10: Selecting The Slot Number For The Module

    In the Slot field, adjust the slot location and then click OK. Studio 5000 Logix Designer will automatically apply the slot number change to all tags, variables and ladder logic rungs that use the MVI56E-GEC slot number for computation. Page 10 of 80...
  • Page 11: Downloading The Sample Program To The Processor

    MVI56E-GEC ♦ ControlLogix Platform Start Here Generic ASCII Ethernet Communication Module User Manual Downloading the Sample Program to the Processor Note: The key switch on the front of the ControlLogix processor must be in the REM or PROG position. If you are not already online with the processor, open the Communications menu, and then choose D .
  • Page 12: Using Prosoft Configuration Builder

    Using ProSoft Configuration Builder ProSoft Configuration Builder ProSoft Configuration Builder (PCB) provides a quick and easy way to manage module configuration files customized to meet your application needs. PCB also allows you to import information from previously installed (known working) configurations to new projects.
  • Page 13: Renaming Pcb Objects

    MVI56E-GEC ♦ ControlLogix Platform Using ProSoft Configuration Builder Generic ASCII Ethernet Communication Module User Manual 2.1.2 Renaming PCB Objects At this time, you may wish to rename the Default Project and Default Location folders in the tree view. Select the object, and then click the right mouse button to open a shortcut menu.
  • Page 14 Using ProSoft Configuration Builder MVI56E-GEC ♦ ControlLogix Platform User Manual Generic ASCII Ethernet Communication Module Creating Optional Comment Entries Click the [+] to the left of the icon to expand the module comments. Double-click the icon. The Edit - Module Comment dialog box appears.
  • Page 15: Server X]

    MVI56E-GEC ♦ ControlLogix Platform Using ProSoft Configuration Builder Generic ASCII Ethernet Communication Module User Manual [Server x] You can configure up to five servers ([Server 0] through [Server 4]). The configuration section for each server contains the same set of parameters. You can configure the parameters for each server to meet the requirements of your application.
  • Page 16: Swap Tx Data Bytes

    Using ProSoft Configuration Builder MVI56E-GEC ♦ ControlLogix Platform User Manual Generic ASCII Ethernet Communication Module 2.2.6 Swap Tx Data Bytes Yes or No This parameter determines if the data to be transmitted by the module will have the byte order of the data swapped. If the parameter is set to No, no byte swapping will occur.
  • Page 17: Ethernet 1 Configuration

    MVI56E-GEC ♦ ControlLogix Platform Using ProSoft Configuration Builder Generic ASCII Ethernet Communication Module User Manual Ethernet 1 Configuration Use this procedure to configure the Ethernet settings for your module. You must assign an IP address, subnet mask and gateway address. After you complete this step, you can connect to the module with an Ethernet cable.
  • Page 18: Assigning A Temporary Ip Address

    User Manual Generic ASCII Ethernet Communication Module Assigning a Temporary IP Address You can assign a temporary IP address to the module using the ProSoft Discovery Service utility. This utility is installed within ProSoft Configuration Builder (PCB). In PCB, click on the Diagnostics icon in the shortcuts menu, or right-click on the module’s icon and select D...
  • Page 19 In the Connection Setup dialog box, click B ) to start ProSoft ROWSE EVICE Discovery Service. ProSoft Discovery Service scans the network for ProSoft devices. Click on the icon to manually initiate a search. ProSoft Technology, Inc. Page 19 of 80...
  • Page 20 Right-click the module icon and select A SSIGN EMPORARY Enter the Temporary IP and Network Mask. To view the current parameters of the MVI56E-GEC, right-click on the module icon and select Device Details. Page 20 of 80 ProSoft Technology, Inc.
  • Page 21: Downloading The Configuration File To The Module

    Using ProSoft Configuration Builder Generic ASCII Ethernet Communication Module User Manual Downloading the Configuration File to the Module In the ProSoft Configuration Builder tree view, right-click the module icon and choose D OWNLOAD FROM EVICE In the Download Files from PC to Module dialog box, select B...
  • Page 22 Using ProSoft Configuration Builder MVI56E-GEC ♦ ControlLogix Platform User Manual Generic ASCII Ethernet Communication Module In the ProSoft Discovery Service dialog, double-click on the MVI56E-GEC icon: The IP address field is populated with the module’s IP address. Click DOWNLOAD to confirm the operation: Once the download is complete, the status field shows ‘Module Running’.
  • Page 23: Configuring The Module In Studio 5000 Logix Designer

    Configuring the Module in Studio 5000 Logix Designer Ladder logic is required for application of the MVI56E-GEC module. Tasks that must be handled by the ladder logic are module data transfer, special block handling, and status data receipt. Additionally, a power-up handler may be needed to handle the initialization of the module’s data and to clear any...
  • Page 24 Value Parameter MVI56E_GEC Enter a description for the module. Example: Generic ASCII ESCRIPTION Ethernet Communication Module Select D -INT ORMAT Enter the slot number in the rack where the MVI56E-GEC module is located NPUT SSEMBLY NSTANCE NPUT UTPUT SSEMBLY NSTANCE...
  • Page 25 MVI56E-GEC ♦ ControlLogix Platform Configuring the Module in Studio 5000 Logix Designer Generic ASCII Ethernet Communication Module User Manual In the Connection tab, select the Request Packet Interval value for scanning the I/O on the module. This value represents the minimum frequency the module will handle scheduled events.
  • Page 26: Ladder Logic

    If you need to add the MVI56E-GEC ladder logic to an existing ControlLogix application, you can export the sample ladder logic components to a .L5X file. This allows you to import the .L5X file into the existing application.
  • Page 27 MVI56E-GEC ♦ ControlLogix Platform Configuring the Module in Studio 5000 Logix Designer Generic ASCII Ethernet Communication Module User Manual Select a storage location to save the MainProgram.L5X file. Click the E XPORT button. Verify the MainProgram.L5X file has been successfully exported.
  • Page 28: Importing The Mvi56E-Gec .L5X File Into An Studio 5000 Project

    User Manual Generic ASCII Ethernet Communication Module 3.2.2 Importing the MVI56E-GEC .L5X file Into an Studio 5000 Project Within the existing Studio 5000 Logix Designer Project, add the MVI56E-GEC module to the I/O Configuration. (For further instructions, see Configuring the MVI56E-GEC in Studio 5000 Logix Designer on page 23).
  • Page 29 Select the (previously exported) MVI56E-GEC MainProgram.L5X file and click the I button. MPORT In the Import Configuration dialog, edit the Local:x:I and Local:x:O tags to correspond to the slot position of the MVI56E-GEC. Then click OK. ProSoft Technology, Inc. Page 29 of 80...
  • Page 30 Configuring the Module in Studio 5000 Logix Designer MVI56E-GEC ♦ ControlLogix Platform User Manual Generic ASCII Ethernet Communication Module Upon successful import, the MVI56E-GEC ladder logic, Controller Tags, and UDT’s are now visible in the Studio 5000 Logix Designer project. Page 30 of 80 ProSoft Technology, Inc.
  • Page 31: Optional Add-On Instruction

    MVI56E-GEC ♦ ControlLogix Platform Configuring the Module in Studio 5000 Logix Designer Generic ASCII Ethernet Communication Module User Manual Optional Add-On Instruction The Optional AOI supports the following optional features:  Read/Write IP Address  Read/Write Date Time Using controller tags, the Optional AOI allows you to request and set the module’s IP address, date, and time.
  • Page 32 Configuring the Module in Studio 5000 Logix Designer MVI56E-GEC ♦ ControlLogix Platform User Manual Generic ASCII Ethernet Communication Module At the Import Configuration window, select the Operation parameter to . Then click OK. REATE The imported AOI rung is now in place.
  • Page 33: Setting Up The Optional Aoi

    In the Message Configuration dialog, under the Communication tab, select the B button. ROWSE In the Message Path Browser dialog, select the MVI56E-GEC module and click OK. ProSoft Technology, Inc. Page 33 of 80...
  • Page 34 Configuring the Module in Studio 5000 Logix Designer MVI56E-GEC ♦ ControlLogix Platform User Manual Generic ASCII Ethernet Communication Module The module name is now displayed in the Path field. Click OK to confirm the route configuration. Repeat the same procedure to set the route for the remaining messages: ...
  • Page 35: Sending And Receiving Ascii Data

    User Manual Sending and Receiving ASCII Data Sending ASCII Data The MVI56E-GEC, whether used as a client or server, can send ASCII texts to a remote device. 4.1.1 Sending ASCII Text as a Client Use the following steps to configure the MVI56E-GEC as a client to send an ASCII string to a remote device (server).
  • Page 36: Sending Ascii Text As A Server

    Sending and Receiving ASCII Data MVI56E-GEC ♦ ControlLogix Platform User Manual Generic ASCII Ethernet Communication Module 4.1.2 Sending ASCII Text as a Server The remote Client must initiate a socket connection before the Server can transmit data to the Client.
  • Page 37: Receiving Ascii Data

    ASCII texts from a remote device. 4.2.1 Receiving ASCII Text as a Client The MVI56E-GEC can receive ASCII strings from the same server it sends to. Since the client socket connection has already been established with the server, the incoming data will be stored in the GEC.C array.
  • Page 38: Receiving Ascii Text As A Server

    Generic ASCII Ethernet Communication Module 4.2.2 Receiving ASCII Text as a Server When a server port of the MVI56E-GEC is set up, it will accept incoming ASCII text from a client only. When the MVI56E-GEC receives an ASCII string from a client, the GEC.S...
  • Page 39: Diagnostics And Troubleshooting

     Status data contained in the module can be viewed through the Configuration/Debug port, using the troubleshooting and diagnostic capabilities of ProSoft Configuration Builder (PCB).  Status data values can be transferred from the module to processor memory and can be monitored there manually or by customer-created logic.
  • Page 40: Scrolling Led

    Verify correct configuration data is being transferred to the module from the ControlLogix controller. If the module's OK LED does not turn Green, verify that the module is inserted completely into the rack. If this does not cure the problem, contact ProSoft Technology Technical Support. Page 40 of 80...
  • Page 41: Troubleshooting

    This indicates a problem with backplane communications. A problem Processor I/O LED could exist between the processor and any installed I/O module, not just flashes the MVI56E-GEC. Verify that all modules in the rack are correctly configured in the ladder logic. Module Errors Steps to take Problem description This indicates that backplane transfer operations are failing.
  • Page 42: Prosoft Configuration Builder Diagnostics Menu

    MVI56E-GEC ♦ ControlLogix Platform User Manual Generic ASCII Ethernet Communication Module ProSoft Configuration Builder Diagnostics Menu In the tree view in ProSoft Configuration Builder, right-click the MVI56E-GEC module and then choose D IAGNOSTICS After the Diagnostics window opens, click the S...
  • Page 43 MVI56E-GEC ♦ ControlLogix Platform Diagnostics and Troubleshooting Generic ASCII Ethernet Communication Module User Manual In the Ethernet field of the Connection Setup dialog box, enter the current IP address, whether it is temporary or permanent. Click T ONNECTION verify that the module is accessible with the current settings.
  • Page 44: Diagnostics Menu Navigation

    User Manual Generic ASCII Ethernet Communication Module 5.2.1 Diagnostics Menu Navigation In the Diagnostics window in ProSoft Configuration Builder, the Diagnostics menu is available through the Ethernet configuration port. The menu is arranged as a tree structure. 5.2.2 Viewing Module Information MODULE >...
  • Page 45: Monitoring Backplane Information

    MVI56E-GEC ♦ ControlLogix Platform Diagnostics and Troubleshooting Generic ASCII Ethernet Communication Module User Manual MODULE > NIC Status 5.2.3 Monitoring Backplane Information BACKPLANE > Status ProSoft Technology, Inc. Page 45 of 80...
  • Page 46: Monitoring Mvi56E-Gec Server X Information

    Diagnostics and Troubleshooting MVI56E-GEC ♦ ControlLogix Platform User Manual Generic ASCII Ethernet Communication Module 5.2.4 Monitoring MVI56E-GEC Server X Information GEC SERVER X > Config GEC SERVER X > Status Page 46 of 80 ProSoft Technology, Inc.
  • Page 47: Monitoring Mvi56E-Gec Client X Information

    MVI56E-GEC ♦ ControlLogix Platform Diagnostics and Troubleshooting Generic ASCII Ethernet Communication Module User Manual 5.2.5 Monitoring MVI56E-GEC Client X Information GEC CLIENT X > Status ProSoft Technology, Inc. Page 47 of 80...
  • Page 48: Mvi56E-Gec Status Controller Tags

    User Manual Generic ASCII Ethernet Communication Module MVI56E-GEC Status Controller Tags The MVI56E-GEC module returns status data to the ControlLogix processor in each read block. This data is transferred to the ControlLogix processor continuously with each read block. The status data includes: ...
  • Page 49 MVI56E-GEC ♦ ControlLogix Platform Diagnostics and Troubleshooting Generic ASCII Ethernet Communication Module User Manual Client Status: ProSoft Technology, Inc. Page 49 of 80...
  • Page 50 Diagnostics and Troubleshooting MVI56E-GEC ♦ ControlLogix Platform User Manual Generic ASCII Ethernet Communication Module Server Status: Page 50 of 80 ProSoft Technology, Inc.
  • Page 51: Connecting To The Module's Webpage

    MVI56E-GEC ♦ ControlLogix Platform Diagnostics and Troubleshooting Generic ASCII Ethernet Communication Module User Manual Connecting to the Module’s Webpage The module’s internal web server provides access to module version and status information, as well as the ability to set the date and time, reboot the module, and download firmware upgrade to the module.
  • Page 52: Reference

    Generic ASCII Ethernet Communication Module Reference Product Specifications The MVI56E-GEC Generic ASCII Ethernet Interface module is designed to allow ControlLogix processors to interface easily with ASCII devices using the TCP/IP protocol and the ControlLogix processor. Compatible devices may be either ASCII instruments with Ethernet built-in or Ethernet connection via a thin server to the existing ASCII device.
  • Page 53: Hardware Specifications

    MVI56E-GEC ♦ ControlLogix Platform Reference Generic ASCII Ethernet Communication Module User Manual 6.1.2 Hardware Specifications Description Specification 800 mA @ 5 Vdc Backplane Current Load 3 mA @ 24 Vdc 0°C to 60°C (32°F to 140°F) Operating Temperature -40°C to 85°C (-40°F to 185°F)
  • Page 54: Functional Specifications

     Module configuration and communication configuration data is transferred to the MVI56E-GEC via a pre-defined user data type in the processor Page 54 of 80 ProSoft Technology, Inc.
  • Page 55: Functional Overview

    Ethernet network. Backplane Data Transfer The MVI56E-GEC module communicates directly over the ControlLogix backplane. Data travels between the module and the ControlLogix processor across the backplane using the module's input and output images. The update frequency of the data is determined by the user-defined scan rate for the module, and the communication load on the module.
  • Page 56 Generic ASCII Ethernet Communication Module The following illustration shows the data transfer method used to move data between the ControlLogix processor, the MVI56E-GEC module, and the Ethernet network. All data transferred between the module and the processor over the backplane is through the input and output images.
  • Page 57 MVI56E-GEC ♦ ControlLogix Platform Reference Generic ASCII Ethernet Communication Module User Manual Read Block These blocks of data transfer information from the module to the ControlLogix processor. The following table shows the structure of the input image used to transfer this data.
  • Page 58 Reference MVI56E-GEC ♦ ControlLogix Platform User Manual Generic ASCII Ethernet Communication Module Multiple Blocks If a server or client receives a message longer than 200 bytes, it must send the received message in multiple blocks to the processor. In this case, the byte count field of the block will be set to -1 for each block where the server is sending more than 200 characters.
  • Page 59 MVI56E-GEC ♦ ControlLogix Platform Reference Generic ASCII Ethernet Communication Module User Manual Write Block These blocks of data transfer information from the ControlLogix processor to the module. The following table shows the structure of the output image used to transfer this data.
  • Page 60 Reference MVI56E-GEC ♦ ControlLogix Platform User Manual Generic ASCII Ethernet Communication Module Words 236 to 240 are used for server socket control. If the server socket is established and the user sets the value in the appropriate word to 1, the server state will be changed to 1003 (new server state) and will abort the socket immediately.
  • Page 61 MVI56E-GEC ♦ ControlLogix Platform Reference Generic ASCII Ethernet Communication Module User Manual Word offsets 203 and 212 request a new connection for one of the five clients in the module. The format of this data area is shown in the following table.
  • Page 62 Reference MVI56E-GEC ♦ ControlLogix Platform User Manual Generic ASCII Ethernet Communication Module Module Control Word Codes Word 247 is used to control the module. The following table lists the commands recognized by the module. Definition Code No operation to perform...
  • Page 63 MVI56E-GEC ♦ ControlLogix Platform Reference Generic ASCII Ethernet Communication Module User Manual Configuration Block In order to support module configuration from the ladder logic, a write block format is required when the Control Word is set to -3. The following table shows...
  • Page 64 TCP/IP connection must be made between a client and a server on the module. The MVI56E-GEC module contains five servers that listen on the user assigned service ports waiting for a connection. When a client wishes to send data to the module, it must open a TCP/IP connection to the module.
  • Page 65 Generic ASCII Ethernet Communication Module User Manual The MVI56E-GEC module servers and clients are configured to handle their TCP/IP session independently. The user parameter Connection Timeout is utilized to determine the amount of time a connection can remain idle before the server will close the connection.
  • Page 66 Reference MVI56E-GEC ♦ ControlLogix Platform User Manual Generic ASCII Ethernet Communication Module Each server on the module is assigned its own server port number. This does not mean that two or more servers cannot share the same port number. In fact this might be desirable in some instances.
  • Page 67 MVI56E-GEC ♦ ControlLogix Platform Reference Generic ASCII Ethernet Communication Module User Manual Each server has a state value in the status data area. This value is utilized by the ladder logic to determine if a connection is present on server. The following table...
  • Page 68: Status Data

    Reference MVI56E-GEC ♦ ControlLogix Platform User Manual Generic ASCII Ethernet Communication Module Status Data This section contains a listing of the data contained in the MVI56E-GEC status data object. Block Offset Description Object in GSCInStat Start Program cycle counter PassCnt...
  • Page 69 MVI56E-GEC ♦ ControlLogix Platform Reference Generic ASCII Ethernet Communication Module User Manual Block Offset Description Object in GSCInStat Start Indicates that the module has opened the server port and Server[1].Open is waiting for a connection to a client. This status value contains the total number of times a Server[1].Established...
  • Page 70 Reference MVI56E-GEC ♦ ControlLogix Platform User Manual Generic ASCII Ethernet Communication Module Block Offset Description Object in GSCInStat Start This flag defines if the server is utilized. A value of 0 Server[3].Enabled indicates the server is not used. Any other value indicates the server is used.
  • Page 71 MVI56E-GEC ♦ ControlLogix Platform Reference Generic ASCII Ethernet Communication Module User Manual Block Offset Description Object in GSCInStat Start This status value contains the total number of transmit Server[4].TxOverflow messages that exceeded the user specified maximum buffer size for the server.
  • Page 72 Reference MVI56E-GEC ♦ ControlLogix Platform User Manual Generic ASCII Ethernet Communication Module Block Offset Description Object in GSCInStat Start This flag defines if the client is utilized and connected to Client[2].Connected a server. A value of 0 indicates the client is not connected and can be utilized for a connection.
  • Page 73 MVI56E-GEC ♦ ControlLogix Platform Reference Generic ASCII Ethernet Communication Module User Manual Block Offset Description Object in GSCInStat Start This status value contains the total number of messages Client[4].RxCount received by the client. This status value contains the total number of messages Client[4].RxOverflow...
  • Page 74: Configuration Data

    Reference MVI56E-GEC ♦ ControlLogix Platform User Manual Generic ASCII Ethernet Communication Module Configuration Data This section contains a listing of the parameters and their definitions for the MVI56E-GEC module configuration. Range Description [Section]/Item Module parameter definitions [MODULE] 0 to 80 characters...
  • Page 75 MVI56E-GEC ♦ ControlLogix Platform Reference Generic ASCII Ethernet Communication Module User Manual Range Description [Section]/Item Server definitions [Server n] Y or N This parameter determines if the server will be utilized Enabled: by the module. If a value of "Y" is entered, the server will be used.
  • Page 76: Support, Service & Warranty

    Details about the serial, Ethernet or Fieldbus devices interfaced to the module, if any. Note: For technical support calls within the United States, ProSoft’s 24/7 after-hours phone support is available for urgent plant-down issues. Detailed contact information for all our worldwide locations is available on the following page.
  • Page 77 MVI56E-GEC ♦ ControlLogix Platform Support, Service & Warranty Generic ASCII Ethernet Communication Module User Manual Europe / Middle East / Africa Asia Pacific Regional Office Regional Office Phone: +33.(0)5.34.36.87.20 Phone: +60.3.2247.1898 europe@prosoft-technology.com asiapc@prosoft-technology.com Languages spoken: French, English Languages spoken: Bahasa, Chinese, English,...
  • Page 78: Warranty Information

    Languages spoken: Spanish, English REGIONAL TECH SUPPORT support.la@prosoft-technology.com Warranty Information For complete details regarding ProSoft Technology’s TERMS & CONDITIONS OF SALE, WARRANTY, SUPPORT, SERVICE AND RETURN MATERIAL AUTHORIZATION INSTRUCTIONS, go to www.prosoft-technology.com/legal Documentation is subject to change without notice.
  • Page 79: Index

    MVI56E-GEC ♦ ControlLogix Platform Index Generic ASCII Ethernet Communication Module User Manual Important Installation Instructions • 3 Installing ProSoft Configuration Builder Software • 7 Index Installing the Module in the Rack • 8 Ladder Logic • 23 LED Indicators • 39 [Server x] •...
  • Page 80 Index MVI56E-GEC ♦ ControlLogix Platform User Manual Generic ASCII Ethernet Communication Module Warnings • 3 Warranty Information • 78 Write Block • 59 Your Feedback Please • 2 Page 80 of 80 ProSoft Technology, Inc.

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