Glossary
Appendix D
D-23
Tasks
A set of instructions, data, and control information capable of being
executed by a CPU to accomplish a specific purpose.
Terminal Address
A 5-digit number which identifies a single I/O terminal. It is also related
directly to a specific image table bit address.
Terminal Control System
The operating system used to execute Grafix programs, and to perform
other activities while the Advisor is on line and in use by an operator.
Termination
(1) The load connected to the output end of a transmission line. (2) The
provisions for ending a transmission line and connecting it to a bus bar or
other terminating device.
Throughput
The rate at which equipment processes or transmits data.
Toggle Switch
A panel-mounted switch with an extended lever; normally used for
On/Off switching.
Trailing Edge One-Shot
A programming technique that sets a bit for a scan when its input condition
has made a true-to-false transition. The true-to-false transition represents
the trailing edge of the input pulse.
True
As related to processor instructions, an enabled logic state.
Two’s Complement
The negative of a binary number obtained by inverting all of the bits in the
number and then adding 1 to the least significant bit.
Underflow Bit
A bit that is set to indicate the result of an operation is less than the
minimum value that can be contained in a register.
Upload
The process of transferring end-device data from a network interface to the
network controller. Control programs can be up-loaded to be verified
against a master copy in memory
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