Rockwell Automation 1772-LV Mini-PLC - 2/15 Programmable Controller (Series B) Programming and Operations User Manual
Page 64
Advanced Instruction Set
Chapter 6
6Ć7
Instruction
Name
Instruction
False
Instruction
True
Symbol
FileĆtoĆfile 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.