Prosoft-technology MVI56E-LDM Manual do Utilizador descarregar pdf (Página 67)

ControlLogix Platform ♦ "C" Programmable Understanding the MVI56-LDM API

Linux Application Development Module Developer's Manual

ProSoft Technology, Inc. Page 61 of 264

March 12, 2014

4.18 Serial Application Sample

Serial_Application shows an example of how the LDM module can be used to

communicate to an end device to transmit/receive ASCII strings from the

ControlLogix5000 processor through the backplane to the LDM module on the

bottom serial port (default application port). This same sample program will

stream ASCII data into the module from the end device on the same serial port

and send the data to the backplane to the controller tags of the ControlLogix.

Send out number of bytes entered in Write_Byte_Cnt Controller tag continuously

after the Serial_App_Sample_WriteTrigger tag has been triggered from the

default application port.

Streams in ASCII data from the end device into the Controller tag Local:1:I.Data.

Note: Use HyperTerminal or a similar program to perform the following steps.

Open HyperTerminal.

Enter a name and choose an icon for the connection.

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Prosoft-technology MVI56E-LDM Manual do Utilizador Página 67