Section 7: Using MON 20/20 Tools

The options in the Tools pull-down menu allow you to do the following:

•Use the Modbus Test program to confirm that data is being accurately relayed from the gas chromatograph to the PC.

•Manage users.

•Adjust the sensitivity of the LOI keys. •Install upgrades to the GC.

7.1Using the Modbus Test program

Use the Modbus program to poll the GC’s Modbus registers (or registers from another device) to confirm that data is accurately relayed from the gas chromatograph to the PC. Then, as necessary, assign data types to the returned data. See “Assigning scale ranges to User_Modbus registers” on page 7-15for more information. You can save all settings to a file for future reference.

You can use this program to facilitate software debugging or for special installations. With this program, you can troubleshoot any device that employs registers including the GC, an ultrasonic meter, or a flow computer.

CAUTION

NOT REQIURED FOR NORMAL GC OPERATION

The Modbus Test is reserved for advanced functions. The Modbus Test function is not required for normal GC operation. Skip this section unless you are developing software, engaging in a software debugging process, or designing a custom installation that directly accesses the GC Controller Modbus registers.

Traditionally, Modbus registers are polled by using a data collection system (DCS). To facilitate installation and debugging, the Modbus program emulates a DCS.

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Emerson Process Management 3-9000-745 manual Using MON 20/20 Tools, Using the Modbus Test program
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3-9000-745 specifications

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