The following notations and terminology will be used in the Native Script Commands and Examples sections.

■ Notations
1) P1, P2, P3, P4, P5: Parameters of native script commands.
2) I, E, C, A, CS, M, AE, CE: Used to indicate the type of parameter a native script command can accept for a specific command parameter.

Abbreviation	Parameter Type
I	Internal Variable
E	External Variable
C	Constant
A	ASCII character string
CS	Character string of the program label
M	Sub-macro name
AE	Arithmetic expression
CE	Comparison expression

3) U, S, UD, SD, F, B: Used to indicate the types of data a native script command can support.

Abbreviation	Data Type
U	16-bit Unsigned Integer
S	16-bit Signed Integer
UD	32-bit Unsigned Integer
SD	32-bit Signed Integer
F	32-bit Floating Point
B	Bit

■ Terminology

Terminology

Definition

Internal memory

The memory space in the HMI that can be accessed by the panel application. For example, the user memory $U, the non-volatile memory $N, the system memory $S, and the recipe memory $R are all parts of the internal memory.

Internal variable

An address or a tag referring to an address of a space in the internal memory.

Internal bit variable

An internal variable that refers to a bit in the internal memory.
For ease of reading, “internal variable” is used instead of “internal bit variable” when referring to a bit if there is no ambiguity.

Internal word variable

An internal variable that refers to a word in the internal memory.
The variables can also be used to refer to a double-word, a block of bytes (byte array), a block of words (word array), and a block of double-words (double-word array).
For ease of reading, “internal variable” is used instead of “internal word variable” when referring to a word or a block of memory space if there is no ambiguity.

External memory

The memory space or collection of addressable devices in the controllers that can be accessed by the panel application through communication links.

External variable

An address or a tag referring to an address of a space in the external memory.

External bit variable

An external variable that refers to a bit in the external memory.
For ease of reading, “external variable” is used instead of “external bit variable” when referring to a bit if there is no ambiguity.

External word variable

An external variable that refers to a word in the external memory.
The variables can also be used to refer to a double-word, a block of bytes (byte array), a block of words (word array), and a block of double-words (double-word array) if the access unit of the associated addresses is word. If the access unit is double-word, you can only use the variable to refer to a double-word or a block of memory space with a length of a multiple of 4 (bytes).
For ease of reading, “external variable” is used instead of “external word variable” when referring to a word or a block of memory space if there is no ambiguity,

Expression

Type	Abbreviation	Description
Arithmetic Expression	AE	Sequences of operators and parameters that are used for computing a value from the parameters.
Comparison Expression	CE	Sequences of operators and parameters that are used for comparing value from the parameters.

The software provides the following types of operators for native script expressions:

Note: The above table lists the operators in order of precedence (from highest to lowest precedence). Operators in the same segment of the table have equal precedence and are evaluated in the given order in an expression unless explicitly forced by parentheses.