Topic: DMD0076

WT - Write to Intelligent Module

The Write to Intelligent Module (WT) instruction is used to write a specified number of bytes of data from memory in the Do-more controller to the specified location in an Intelligent Module's shared RAM.

 

Write to Intelligent Module (WT) is a Multi-Scan instruction.

 

Parameters:

Note: Use the F9 key (Element Browser) or Down-Arrow key (Auto-Complete) at any time to see a complete list of the memory locations that are valid in the current field of the instruction.

 

Intelligent Module - selects which module to write to

 

No devices available - indicates that there are no Intelligent Modules in the system. Select  the following to create the required module:
 

    • create module - select this option to invoke the Module Configuration dialog of the System Configuration to create a new module configuration

 

Source - designates the first location of the data that will be written to the module. This can be any readable numeric location.

 

Number of Bytes - designates the number of bytes of data to write to the module. This can be any positive constant integer from 1 to 2147483648, or any readable numeric location.

 

Destination - designates the beginning address in the module where the data will be written. This can be any positive constant integer from 0 to 2147483647, or any readable numeric location. For details on specific destination addresses for specific modules, reference the user manual for that specific module.

 

On Success: - designates one of the following two options if the Write to Intelligent Module operation is successful:

 

  • SET BIT - The specific BIT location will be SET OFF when the Write to Intelligent Module (WT) instruction is first enabled, and then SET ON if the operation is successful. This value can be any writable bit location.
     

  • JMP to Stage - JMP to the specified Stage. The target Stage must be in the same Program as the Write to Intelligent Module (WT) instruction, you cannot specify a Stage in a different Program. This selection will function the same as a standalone Jump to Stage instruction. Click here for more information on the Jump To Stage instruction.

 

On Error: - designates one of the following two options if the Write to Intelligent Module operation is unsuccessful:
 

  • SET BIT - The specific BIT location will be SET OFF when the Write to Intelligent Module (WT) instruction is first enabled, and then SET ON if the operation is unsuccessful. This value can be any writable bit location.
     

  • JMP to Stage - JMP to the specified Stage. The target Stage must be in the same Program as the Write to Intelligent Module (WT) instruction, you cannot specify a Stage in a different Program. This selection will function the same as a standalone Jump to Stage instruction. Click here for more information on the Jump To Stage instruction.

 

See Also:

 

Rung Example:

Traditionally this instruction was used to manage intelligent modules at runtime. Do-more controllers provide a complete interface to the configuration and runtime configuration through the System Configuration or through other instructions.

 

This instruction remains as part of instruction set in case there are instances in the future when this functionality is again required.