Omron SYSMAC LINK C1000H-SLK21-V1 System Manual page 158

DIP switch
distributed control
electrical noise
error code
even parity
event (data) transfer
event processing
FA
fatal error
flag
force reset
force set
frame checksum
gateway
GPC
Graphic Programming Console
hexadecimal
host computer
144
Glossary
Dual in-line package switch, an array of pins in a signal package that is mounted
to a circuit board and is used to set operating parameters.
A automation concept in which control of each portion of an automated sys-
tem is located near the devices actually being control, i.e., control is
decentralized and 'distributed' over the system. Distributed control is a con-
cept basic to PC Systems.
Random variations of one or more electrical characteristics such as voltage, cur-
rent, and data, which might interfere with the normal operation of a device.
A numeric code generated to indicate that an error exists, and something about
the nature of the error. Some error codes are generated by the system; others
are defined in the program by the operator.
A communication setting that adjusts the number of ON bits so that it is always
even. See parity .
A data transfer that is performed in response to an event, e.g., an interrupt sig-
nal.
Processing that is performed in response to an event, e.g., an interrupt signal.
Factory automation.
An error that stops PC operation and requires correction before operation can
continue.
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.
The process of forcibly turning OFF a bit via a programming device. Bits are usu-
ally turned OFF as a result of program execution.
The process of forcibly turning ON a bit via a programming device. Bits are usu-
ally turned ON as a result of program execution.
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.
An interface that connects two networks.
An acronym for Graphic Programming Console.
A programming device with advanced programming and debugging capabilities
to facilitate PC operation. A Graphic Programming Console is provided with a
large display onto which ladder-diagram programs can be written directly in lad-
der-diagram symbols for input into the PC without conversion to mnemonic
form.
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.
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.