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Operating Instructions Teledyne API - Model 200EH/EM Operation Manual
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6.15.2.4. Data Types
Data types consist of integers, hexadecimal integers, floating-point numbers, Boolean expressions and text
strings.
Integer data are used to indicate integral quantities such as a number of records, a filter length, etc.
They consist of an optional plus or minus sign, followed by one or more digits. For example, +1, -12,
123 are all valid integers.
Hexadecimal integer data are used for the same purposes as integers. They consist of the two
characters “0x,” followed by one or more hexadecimal digits (0-9, A-F, a-f), which is the ‘C’ programming
language convention. No plus or minus sign is permitted. For example, 0x1, 0x12, 0x1234abcd are all
valid hexadecimal integers.
Floating-point numbers are used to specify continuously variable values such as temperature set points,
time intervals, warning limits, voltages, etc. They consist of an optional plus or minus sign, followed by
zero or more digits, an optional decimal point, and zero or more digits. (At least one digit must appear
before or after the decimal point.) Scientific notation is not permitted. For example, +1.0, 1234.5678, -
0.1, 1 are all valid floating-point numbers.
Boolean expressions are used to specify the value of variables or I/O signals that may assume only two
values. They are denoted by the keywords ON and OFF.
Text strings are used to represent data that cannot be easily represented by other data types, such as
data channel names, which may contain letters and numbers. They consist of a quotation mark,
followed by one or more printable characters, including spaces, letters, numbers, and symbols, and a
final quotation mark. For example, “a”, “1”, “123abc”, and “()[]<>” are all valid text strings. It is not
possible to include a quotation mark character within a text string.
Some commands allow you to access variables, messages, and other items, such as iDAS data
channels, by name. When using these commands, you must type the entire name of the item; you
cannot abbreviate any names.
04521C (DCN5731)