Omron C200H-MC221 Operation Manual page 298

WDT
wiring check
word
work bit
write-protect
zone
278
Glossary
See watchdog timer.
A check performed automatically at startup to detect wiring problems such as
reversed polarity or disconnections.
A unit of data storage in memory that consists of 16 bits. All data areas consists
of words. Some data areas can be accessed only by words; others, by either
words or bits.
A bit that can be used for data calculation or other manipulation in programming,
i.e., a 'work space' in memory. Also see work word.
A state in which the contents of a storage device can be read but cannot be
altered.
A range of positions or values which can be defined so that flags are turned ON
whenever the present position is within the range.