rs5000 simple SCL question

I am having difficulty doing something i do in every other plc without a problem

I have created an SCL AOI.

I have an integer input to it. Lets call it "BITS"
for now. obviously bits has the following components
BITS.0
BITS.1
BITS.2

etc etc etc


i then write the following in the script

IF BITS.0 = TRUE THEN
DO SOMETHING
END_IF


Thats all i have done.
Nothing special, just typical bit access of an integer.

All im getting is compile errors and i dont get why.

Anyone with any ideas

the compile error im getting is

'BITS.0': BOOL tag not expected in expression.

Instead of True have you tried 1?

or



IF BITS.0 THEN
DO SOMETHING
END_IF

There are only a few pre-defined tags in ControlLogix, mostly things like the "S:FS" first scan bit. There are no named constants.

"TRUE" is a valid name for a user defined Tag of any type. So is "FALSE". That's why Studio 5000 objected to your using them. And the "=" operator does not accept boolean arguments.

In structured text, a BOOL tag or a bit sub-element of a tag is a standalone True or False condition just by naming it.