Emerson Process Management 3-9000-745 Troubleshooting communication errors, Saving Modbus data

MON20/20 Software for Gas Chromatographs	User Manual
SEPTEMBER 2010	3-9000-745

7.1.7 Saving Modbus data

To save the data table to a separate file, do the following:

1.Click Save Data. The Save ‘Data’ Displayed As dialog appears. The file can be saved as a tab-delimited text file, an HTML file or a Microsoft Excel file.

2.Type in a filename and click Save.

7.1.8Printing Modbus data

To print Modbus data, click Print Data. The standard print dialog displays.

MON 20/20 prints the report to your previously configured printer. See Section 1.7 for more information.

7.1.9 Assigning scale ranges to User_Modbus registers

By assigning scale ranges, floating point data can be converted to integer values. This is an optional task that applies to applications using the User_Modbus protocol.

Use the Register command described in Section 4.12.4, “Viewing or editing scales” on page 92 to assign scale ranges. See Appendix C for more information regarding the gas chromatograph’s Modbus registers.

7.2Troubleshooting communication errors

The Modbus program’s Error Log is maintained in a circular buffer that holds up to 512 entries.

The Modbus program tracks the errors for a given session but does not store them. When you exit the Modbus program, all errors are cleared.

To view any communication errors that occurred during the data transfer, do the following:

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