Precautions On Assigning A Name - Mitsubishi Electric MELSEC Q Series Programming Manual

4.8

Precautions on Assigning a Name

This section explains the conditions for assigning a name to a label, function block instance, or structure label.
• Specify a name within 32 characters.
• Do not use reserved words. For reserved words, refer to the following section.
Page 100 Character Strings That Cannot Be Used in Label Names and Data Names
• Use alphanumeric and underscores (_).
• Do not use an underscore at the end of the name. Do not use two or more underscores in succession.
• Do not use spaces.
• Do not use a number for the initial character.
• Constants cannot be used. (An identifier that begins with 'H' or 'h' and an expression where a hexadecimal (0 to F)
immediately follows 'H' or 'h' (maximum 9 digits including 'H' or 'h' (excluding 0 that immediately follows 'H' or 'h')) are also
treated as a constant. (Example: 'hab0'))
• Elementary data type names cannot be used.
• Function/FB names cannot be used.
4 PROGRAM CONFIGURATION
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4.8 Precautions on Assigning a Name