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Glossary
361
watchdog timer
A timer within the system that ensures that the cycle time stays within speci-
fied limits. When limits are reached, either warnings are given or PC opera-
tion is stopped depending on the particular limit that is reached.
Wired Slave Rack
A Slave Rack connected through a Wired Remote I/O Slave Unit.
word
A unit of data storage in memory that consists of 16 bits. All data areas con-
sists of words. Some data areas can be accessed only by words; others, by
either words or bits.
word address
The location in memory where a word of data is stored. A word address must
specify (sometimes by default) the data area and the number of the word that
is being addressed.
word multiplier
A value between 0 and 3 that is assigned to a Master in a Remote I/O Sys-
tem so that words can be allocated to non-Rack-mounting Units within the
System. The word setting made on the Unit is added to 32 times the word
multiplier to arrive at the actual word to be allocated.
work bit
A bit in a work word.
work word
A word that can be used for data calculation or other manipulation in pro-
gramming, i.e., a ‘work space’ in memory. A large portion of the IR area is
always reserved for work words. Parts of other areas not required for special
purposes may also be used as work words, e.g., LR words not used in a PC
Link or Net Link System.
Содержание SYSMAC C200H
Страница 1: ...OPERATION MANUAL C200H CPU01 E 03 E 11 E SYSMAC Programmable Controllers Cat No W130 E1 05 ...
Страница 2: ...C200H Programmable Controllers CPU01 E 03 E 11 E Operation Manual Revised June 2003 ...
Страница 3: ...iv ...
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Страница 8: ...TABLE OF CONTENTS ix Glossary 345 Index 363 Revision History 369 ...
Страница 342: ...336 Programmer Program Date Page Word Contents Notes Word Contents Notes Data Storage ...
Страница 374: ...Cat No W130 E1 05 C200H Programmable Controllers CPU01 E 03 E 11 E OPERATION MANUAL ...