Allen-Bradley ControlLogix 5570 Reference Manual page 114

Chapter 6 Instruction Execution
114
If an instruction only verifies with tags of type DINT, it also only verifies with literal values that are Integers.
MEQ: Error during Controller Verification: Invalid Data Type.
Argument must match parameter data type.
MAJ in Structured Text
When you specify a floating literal for the Direction argument (a DINT), you get the following error.
The following instruction is valid, even though it fails verification if a tag of type REAL was used for Mask.
MEQ
Source: DINT_Tag_1
Mask: 12.35
Compare: DINT_Tag_2
Mitigation
Resolve any verification errors that occur when you open and import projects
in the Studio 5000 Logix Designer® application, version 28 or later.
Rockwell Automation Publication 1756-RM100F-EN-P - October 2018
5580/5380 Controllers
5570/5370 Controllers