Panasonic FP3 Technical Manual page 140

8-6. Terminology
binary number system:
Block Check Code (BCC):
buffer:
bug:
bus:
Central Processing Unit:
character:
complement:
computer link:
CPU:
CRT:
134
A number system that uses two symbols, "0" and "1". Each digit position has a
weighted value of 1, 2, 4, 8, 16, 32, 64, and so on begining with the least significant
(right-most) digit.
S S
Bit position n
Zn S S
The sum of N0 through Nn is the decimal equivalent of the number in base "2".
This code is used to detect errors in message transmissions. It is created by Exclusive
ORing all of the codes from the header though the last text character, then translating
the result (8-bit) data into two ASCII characters.
A group of registers used for temporary data storage. This is used for data
transmission and works effectively when there are transmission rate differences
between sending and receiving devices.
Software errors which will cause unexpected actions.
Power distribution conductors.
The Central Processing Unit is usually referred to as the CPU.
The CPU controls system activities of the programmable controller.
A symbol such as a letter of the alphabet or decimal number. An ASCII character is
most commonly used to express characters using binary.
A logical operation that inverts a signal or bit. The complement of "1" is "0", and the
complement of "0" is "1".
One of the communication methods between a computer and programmable
controllers. In a computer link, the computer is the host, and it can control
programmable controllers using a protocol. For FP series programmable controllers,
communication between a computer and programmable controllers is performed
using the MEWTOCOL-COM communication protocol. From the computer, you
can read, write, or monitor data stored in the memory of a programmable controller.
See Central Processing Unit.
Abbreviation for cathode-ray tube.
Base = 2
S S S
3 2 1 0
S S S Z3 Z2 Z1 Z0
Z0 × 2
Z1 × 2
Z2 × 2
Z3 × 2
Zn × 2
0
= N0
1
= N1
2
= N2
3
= N3
S
S
S
n
= Nn