Glossary
116
FA
Factory automation.
factory computer
A general-purpose computer, usually quite similar to a business computer, that
is used in automated factory control.
FAL error
An error generated from the user program by execution of an FAL(06) instruc-
tion.
FALS error
An error generated from the user program by execution of an FALS(07) instruc-
tion or an error generated by the system.
fatal error
An error that stops PC operation and requires correction before operation can
continue.
FCS
See frame checksum.
flag
A dedicated bit in memory that is set by the system to indicate some type of oper-
ating status. Some flags, such as the carry flag, can also be set by the operator
or via the program.
flicker bit
A bit that is programmed to turn ON and OFF at a specific frequency.
floating-point decimal
A decimal number expressed as a number (the mantissa) multiplied by a power
of 10, e.g., 0.538 x 10
–5
.
force reset
The process of forcibly turning OFF a bit via a programming device. Bits are usu-
ally turned OFF as a result of program execution.
force set
The process of forcibly turning ON a bit via a programming device. Bits are usu-
ally turned ON as a result of program execution.
forced status
The status of bits that have been force reset or force set.
frame checksum
The results of exclusive ORing all data within a specified calculation range. The
frame checksum can be calculated on both the sending and receiving end of a
data transfer to confirm that data was transmitted correctly.
function code
A two-digit number used to input an instruction into the PC.
hardware error
An error originating in the hardware structure (electronic components) of the PC,
as opposed to a software error, which originates in software (i.e., programs).
header code
A code in an instruction that specifies what the instruction is to do.
hexadecimal
A number system where all numbers are expressed to the base 16. In a PC all
data is ultimately stored in binary form, however, displays and inputs on Pro-
gramming Devices are often expressed in hexadecimal to simplify operation.
Each group of four binary bits is numerically equivalent to one hexadecimal digit.
host computer
A computer that is used to transfer data to or receive data from a PC in a Host
Link system. The host computer is used for data management and overall sys-
tem control. Host computers are generally small personal or business comput-
ers.
host interface
An interface that allows communications with a host computer.
host link
An interface connecting a PC to a host computer to enable monitoring or pro-
gram control from the host computer.
HR area
A memory area that preserves bit status during power interrupts and used as
work bits in programming.
I/O bit
A bit in memory used to hold I/O status. Input bits reflect the status of input termi-
nals; output bits hold the status for output terminals.
Summary of Contents for SYSMAC CPM1
Page 1: ...Cat No W262 E1 4 Programmable Controllers SYSMAC CPM1 OPERATION MANUAL ...
Page 2: ...CPM1 Programmable Controllers Operation Manual Revised February 1998 ...
Page 116: ...105 Appendix B Dimensions All dimensions are in millimeters CPM1 10CDR j 121 130 85 81 90 ...
Page 118: ...Appendix B Dimensions 107 CPM1 20EDR 81 90 171 180 85 ...
Page 119: ...Appendix B Dimensions 108 CPM1 CIF01 90 81 21 30 205 50 56 CPM1 CIF11 90 81 21 30 205 50 61 ...