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How to create an IO scanner variable in the M580 DTM.

Goals and Symptoms
How to create an IO scanner variable in the M580 DTM

Facts and Change
M580

Causes and Fixes  
The following steps can be used to create an IO scanner variable in the M580 DTM.
  • Open the DTM Browser.
  • Right click on the M580 and select Add.

 
  • Click on Modbus Device in the Add window.

 
  • Click on Add Request to add an item in the Request Setting table (i.e., add a request for a length of 100)
  • Click on Apply.
  • Click on OK.
  • Click on Request Items
  • If you scroll through the list, it will show 200 items. (2 bytes per word) for both the Input and Output tab
  • Click on a line item to select it.
  • Click on Define Item(s).

 
  • Select a variable type.
  • Enter a name for the variable.
  • Click on OK.

 
  • Click Apply.


Open the Data Editor.
If you try to assign a %MW variable to the Device DDT variable, it will fail.


Note:  In order to assign a register to the Device DDT variable, it must be converted to an INT.
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