Correct PLC syntax for AND condition

[DLS_James]

Hello,

 

What is the correct syntax for an AND condition inside a conditional?

 

I am trying to do the following:

 

if ((OMEGA_POSITION / OMEGA_SCALER) > OMEGA_LOW_THRESHOLD) && ((OMEGA_POSITION / OMEGA_SCALER) < OMEGA_HIGH_THRESHOLD)

{

OMEGA_POSITION_OK = 1;

}

else

{

OMEGA_POSITION_OK = 0;

}

 

Related to this, is there a way of getting the pre-processor to tell you what error it sees?

 

eg. With,

 

projpp

Error: projpp errors = 1

 

This message would be more helpful if it told you the error and which file and line number.

 

Thanks for any help,

 

James

[Omron Forums Support]

You want both conditions to be inside the outer most parenthesis of the if statement.

if ((OMEGA_POSITION / OMEGA_SCALER > OMEGA_LOW_THRESHOLD) && (OMEGA_POSITION / OMEGA_SCALER < OMEGA_HIGH_THRESHOLD))
or
if (OMEGA_POSITION / OMEGA_SCALER > OMEGA_LOW_THRESHOLD && OMEGA_POSITION / OMEGA_SCALER < OMEGA_HIGH_THRESHOLD)

 

As far as the error message goes, usually if I double click on the error it puts me on the correct line of the correct file in the IDE. If double clicking doesn't work, could you give me a screenshot of the error?

[steve.milici]

The "&&" is the correct syntax for the logical "and" conditional combinatorial operator.

 

You can view the errors in the "Error List" tab. When you double-click on an error it will open the source file in the editor window with the cursor at that position.

[DLS_James]

Thank you - the outer parentheses did the trick!

 

Regarding the pre-processor error, I'm not using the IDE. I'm connecting using telnet and running the pre-processor from the command line (see screenshot). Can I get any useful error messages at this level?

[steve.milici]

The errors are in the project "Log" folder.

 

Please note that we don't "officially" support usage of "projpp" outside of the IDE.