FP3 MEWNET-TR
Chapter8-6. Page.145
141
two’s complement:
A number system used to express positive and negative numbers in binary. In this
system, the number becomes negative if the most significant bit of the data is “1”.
In FP series programmable controllers, numbers are expressed using the two’s
complement.
underflow:
The act of going below the minimum limit in a register’s capacity.
watchdog timer:
Atimerthatmonitorsprocessingtimeoftheprogrammablecontroller.If theprogram
does not time out, the processor is assumed to be faulty.
word:
A unit of bits which is usually executed at the same time. A word is composed of 16
bits.
8-6. Terminology
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