2 Instruction Descriptions
2-712
NJ-series Instructions Reference Manual (W502)
Size of variable name of DstDat • The size of the variable name is calculated as the total bytes for the ASCII
characters in all structure levels plus two times the number of levels.
• If the number of bytes of ASCII characters in a level is an odd number, add
1.
• If a level in the structure is an array, add four times the number of dimen-
sions in the array.
• Periods and commas in the structure and arrays are not included in the vari-
able name size.
Example 1: When the Variable Name of DstDat Is aaa.bbbbb[1,2,3].cc
• The text string “aaa” in the first level is 3 bytes. It is an odd number, so 1 is
added to make 4 bytes.
• The text string “bbbbb[1,2,3]” in the second level is 5 bytes. It is an odd
number, so 1 is added to make 6 bytes.
• Also bbbbb[1,2,3] is a three-dimensional array, so 3 times 4, or 12, is
added to make 18 bytes.
• The text string “cc” in the third level is 2 bytes. It is an even number, so 2
bytes is used in the calculation.
• If we add the number of levels 3 times 2, or 6, to 4 bytes for the first level,
18 bytes for the second level, and 2 bytes for the third level, the size of the
variable name come to 30 bytes.
Example 2: When the Variable Name of DstDat Is val
• The text string “val” in the first level is 3 bytes. It is an odd number, so 1 is
added to make 4 bytes.
• If we then add the number of levels 1 times 2, or 2, the size of the variable
name is 6 bytes.
Example 3: When the Variable Name of DstDat Is array[8].
• The text string “array” in the first level is 5 bytes. It is an odd number, so 1
is added to make 6 bytes.
• It is a one-dimensional array. Therefore, 1 times 4, or 4, is added.
• If we then add the number of levels 1 times 2, or 2, the size of the variable
name is 12 bytes.
Item in above formula Meaning
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