GSK218M CNC System Connection and PLC Manual
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When the processing is 1st 4ms, A=1, and B=1 after 1st sequence part is executed. At the same
time, 2nd sequence part is started to execute A=1 is stored to the 2nd sequence part and the 1st
division of 2nd sequence part is executed.
When the processing is 2nd 4ms, A=0, and B=0 after 1st sequence part is executed. And then
2nd division of 2nd sequence part is executed, at this time, A is still 1. So C=1.
So, B and C are different.
2.6 Interlocking
Interlocking is externally important in sequence control safety.
Interlocking with the sequence program is necessary. However, interlocking with the end of the
electric circuit in the machine tool magnetics cabinet must not be forgotten. Even though logically
interlocked with the sequence program (softward), the interlock will not work when trouble occurs
in the hardware used to execute the sequence program. Therefore, always provide an interlock
inside the machine tool magnetics cabinet panel to ensure operator safety and to protect the
machine from damage.
END1
A
C
2st division of 2st
level sequence part
A
B
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