Installation manual
CNC 8035
7.
INTRODUCTION TO THE PLC
Loop time
(SOFT M: V15.3X)
(S
OFT T: V16.3X)
·290·
7.3 Loop time
The time the PLC requires to execute the program is called cycle time and can vary in the successive
cycles of a same program, as the conditions under which they are executed are not the same.
plc.m.p WDGPRG (P0) sets the maximum cycle execution time This is called WATCH-DOG time
and if a cycle is executed which lasts longer than 1.5 times this time, or two cycles are executed,
one after the other, taking longer than this time period, the CNC will display the WATCH-DOG error
of the main module.
This way, the execution of cycles that, due to their duration, disturb the operation of the machine
can be prevented and the PLC can be prevented from executing a cycle which has no end due to
a programming error.
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