[yaji63]

I' am facing a problem WRT Custom Macro programming on Fanuc. Below is a line where I want to execute a conditional statement.

IF [#147 EQ 0] GOTO 1

In this case, if the value #147 shows "DATA EMPTY" then this is not considered as zero and the conditional statement does not get executed.

How to compare "DATA EMPTY" or Nul value in a variable in conditional statement ?

Thanks a Ton

[sinha_nsit]

[#147 EQ #0] would be TRUE if #147 is undefined.

[yaji63]

On my machines it is not true and I have tried on 4 machines before I gave up. Actual value of Zero in the variable returns true but undefined returns False. Undefined is actually "Nul" character and hence cannot be considered as Zero.

Anyways I found a work around. #0 is always undefined and it is also not permitted to assign a value to it. If I use [#147 EQ #0] (only in the cases of undefined values to be compared), this will return true

[sinha_nsit]

This is exactly what I suggested.
Except EQ and NE in logical statements, #0 is equivalent to 0.