12.05.2014 Views

Automating Manufacturing Systems - Process Control and ...

Automating Manufacturing Systems - Process Control and ...

Automating Manufacturing Systems - Process Control and ...

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

plc st - 19.14<br />

Write a structured text program to control a press that has an advance <strong>and</strong> retract with<br />

limit switches. The press is started <strong>and</strong> stopped with start <strong>and</strong> stop buttons.<br />

• Normal ladder logic output functions can be used except for those listed below.<br />

not valid output functions: JMP, END, MCR, FOR, BRK, NXT, MSG, SDS, DFA,<br />

AND, OR, XOR, TND<br />

valid output functions include: OTL, OTU, OTE, TON, TOF, RTO, CTU, CTD, RES,<br />

ADD, SUB, MUL, DIV, etc...<br />

Figure 19.21<br />

Acceptable Ladder Logic Functions

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!