Panasonic FP3 - Page 141

FP3 MEWNET-TR
Chapter8-6. Page.139
135
data transfer:
The data transfer function enables a programmable controller to send or get data
to/from another programmable controller. This function is usually used between
programmable controllers using the
F145 (SEND)/P145 (PSEND)
and
F146 (RECV)/P146 (PRECV)
instructions through the link units. If you use
this for communication with a computer, you need to prepare programs that
conform to the MEWTOCOL-DAT format at the computer.
debug:
Removing errors from a program.
decimal number system:
The decimal number system uses the number 10 as the base and the allowable
symbols are “0”, “1”, “2”, “3”, “4”, “5”, “6”, “7”, “8”, and “9”.
Eachdigit positionhasaweightedvalueof1, 10,100, 1000,and soon,begining with
the least significant (right-most) digit.
duplex:
See full-duplex.
EEPROM:
Electrically Erasable Programmable Read Only Memory. EEPROM can be
programmed and erased by electrical pulses.
EPROM:
Erasable Programmable Read Only Memory. EPROM can be reprogrammed after
being entirely erased with the use of an ultra-violet light source.
FIFO:
See First-In-First-Out.
First-In-First-Out:
The order that data is written in, and read from registers.
flag:
A relay used to detect and remember certain events in the programmable controller.
In FP series programmable controllers, some of the special internal relays are used
as flags.
full-duplex:
A communication link in which data can be transmitted and received at the same
time.
half-duplex:
A communication link in which transmission is limited to one direction at a time.
hexadecimal:
The hexadecimal number system uses 16 as the base. The allowable symbols are
numbers 0 through 9 and letters A through F. The letters are substituted for numbers
10 to 15, respectively, to represent all 16 numbers in one digit.
The binary number system can easily be represented in hexadecimal with 4 bit
groups. In this manner, a very large binary number can be represented by a
hexadecimal number with significantly fewer digits.
Bit position
15
SS
12 11
SS
87
SS
43
SS
0
Binary
1 0 0 1 1 1 1 1 0 0 0 1 1 0 1 0
Most significant digit Least significant digit
Digit position
3210
Hexadecimal
9 F 1 A
8-6. Terminology