Rockwell Automation 2706-M1 MESSAGEVIEW 421 HARDWARE MANUAL - Manual (Page 123)

Glossary G–3
Publication 2706-816 – November 1996
E –
EEPROM (Flash) – Acronym for Electrically Erasable
Programmable Read Only Memory. A MessageView terminal uses a
flash EEPROM to store its Firmware and an Application.
EMI – Acronym for Electromagnetic Interference. An extraneous
signal in a circuit that can interfere with the desired signal.
EPROM – Acronym for Erasable Programmable Read Only
Memory. It is a computer chip that can be written to and erased, but
retains its stored data when power is turned off.
F –
Firmware – Software that allows the MessageView terminal to run
an Application. Several versions of firmware are available,
depending on how the terminal is to be used.
Flashing – A Message or part of a message that is emphasized by
being turned on and off regularly in the MessageView terminal
display.
Front Panel Editor – Firmware that allows the terminal operator
to check on and to some extent reconfigure a MessageView terminal.
Also referred to as FPE.
Function Keys – A set of keys labeled F1 to F16 (only on the
MessageView 421F terminal) that may be enabled for a Message.
When a displayed message has a function key or keys enabled, the
terminal operator can use the key(s) to initiate a procedure. Function
keys are disabled unless they are specifically enabled for a message
being displayed.
G –
Graphic – One of 32 standard ISA bitmaps representing motors,
valves and other objects used in manufacture.
H –
HE Stack – Acronym for the Historical Event Stack. A file in the
MessageView terminal in which messages are logged as they are
Triggered, with a time/date stamp. The file may be viewed by the
terminal operator, or uploaded into a computer for analysis.