Prosoft-technology MVI56E-MCMR Manual de usuario descargar pdf (Pagina 137)

MVI56E-MCMR ♦ ControlLogix Platform Diagnostics and Troubleshooting

Modbus Communication Module with Reduced Data Block User Manual

ProSoft Technology, Inc. Page 137 of 225

May 13, 2014

5.3 Reading Status Data from the Module

The MVI56E-MCMR module returns a 33-word Status Data block that can be

used to determine the module’s operating status. This data is transferred to the

ControlLogix processor with an MSG instruction. For a complete listing of the

status data object, refer to MVI56E-MCMR Status Data Definition (page 177).

5.3.1 Required Hardware

You can view configuration information, perform maintenance, and send (upload)

or receive (download) configuration files through the module’s Ethernet port.

ProSoft Technology recommends the following minimum hardware to connect

your computer to the module:

 80486 based processor (Pentium preferred)

 1 megabyte of memory

 Use the included Ethernet cable to connect the module to an Ethernet hub or

a 10/100 Base-T Ethernet switch, or directly to the Ethernet port on your PC.

5.3.2 Viewing the Error Status Table

Command execution status and error codes for each individual command are

stored in a Master Command Status/Error List, held in the module’s internal

memory. There are several ways to view this data.

 View Command Status, Slave Status and Port Status in the Diagnostics

dialog box in ProSoft Configuration Builder (page 132).

 Configure the Command Error Pointer parameter (<CmdErrPtr>) to copy the

status/error values into the User Database area of module memory.

 Copy this table to a section of the ReadData area, where you can view it in

the <READDATAARRAY> tag array in the ControlLogix controller tag database.

You can use these values for communications status monitoring and

alarming.

o COMMAND ERROR POINTER = "MCMR.CONFIG.PORTX.CMDERRPTR"

o <READDATAARRAY> = "MCMR.DATA.READDATA[X]"

These variables would hold the literal tag names in the sample program or

Add-On Instruction. Use these variables to accommodate future ladder or tag

changes while maintaining backward compatibility.

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Prosoft-technology MVI56E-MCMR Manual de usuario Pagina 137