Specifications

Appendix A. Glossary
A-4
high resolution a high resolution data value has 5 significant digits and may
range in magnitude from +.00001 to +99999. A high resolution data
value requires 2 Final Storage locations (4 bytes). All Input and
Intermediate Storage locations are high resolution. Output to Final
Storage defaults to low resolution; high resolution output must be
specified by Instruction 78.
HTML Hypertext Markup Language. A programming language used for the
creation of web pages.
HTTP Hypertext Transfer Protocol. A TCP/IP application protocol.
indexed input location an Input location entered as an instruction parameter
may be indexed by keying "C" before it is entered by keying "A"; two
dashes (--) will appear at the right of the display. Within a loop
(Instruction 87, Section 12), this will cause the location to be incremented
with each pass through the loop. Indexing is also used with Instruction
75 to cause an Input location, which normally remains constant, to be
incremented with each repetition.
INF infinite or undefined. A data word indicating the result of a function is
infinite or undefined.
input/output instructions used to initiate measurements and store the results
in Input Storage or to set or read Control/Logic Ports.
integer a number written without a fractional or decimal component. 15 and
7956 are integers. 1.5 and 79.56 are not integers.
intermediate storage that portion of memory allocated for the storage of
results of intermediate calculations necessary for operations such as
averages or standard deviations. Intermediate storage is not accessible to
the user.
IP Internet Protocol. A TCP/IP internet protocol.
IP Address A unique address for a device on the internet.
loop in a program, a series of instructions which are repeated a prescribed
number of times, followed by an "end" instruction which exists the
program from the loop.
loop counter increments by 1 with each pass through a loop.
low resolution the default output resolution. A low resolution data value has 4
significant decimal digits and may range in magnitude from +0.001 to
+6999. A low resolution data value requires 1 Final Storage location (2
bytes).
manually initiated initiated by the user, usually with a keyboard, as opposed
to occurring under program control.
milli the SI prefix denoting 1 / 1000s of a base SI unit.
Modbus communication protocol published by Modicon in 1979 for use in
programmable logic controllers (PLCs).