Rockwell-automation 1772-LV Mini-PLC - 2/15 Programmable Controller (S Manual de usuario Pagina 64

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Advanced Instruction Set
Chapter 6
67
Instruction
Name
Instruction
False
Instruction
TrueSymbol
Filetofile Move FILE 10 470 200
[1]
When a rung which contains a ZCL instruction is false, the execution time of
each instruction between the start fence and end fence is 17 microseconds per
word.
If the scan time is over 130ms a watch dog timer (internal alarm system) will
automatically timeout and the processor will shut down.
The time required for the processor to execute some instructions can be quite
long. Repeated use of instructions with long execution times could cause the
watch dog timer to time out. Therefore, the watch dog timer reset automatically
every time the processor executes any one of the following instructions:
File-to-file move Sequencer output
File-to word move Return
Word-to file move Temporary end
Sequencer input Subroutine area
These instructions will be discussed later in this chapter.
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