Pulse Operated Switch
3.8 Time to Show What You Know
Getting Started - Advanced
30 Training Documents, 09/2007, A5E01469795B
3.8 Time to Show What You Know
You’ve made some real progress!
Read and answer the questions below.
• What is the scan cycle of a PLC? What are the three main functions of
the scan cycle?
Section 1.6
• How is a latching function implemented in a PLC?
Section 2.1
• Normally-closed contact: How is this represented in the ladder
diagram,
What effect does it have, which safety measures can be achieved
using it?
Section 2.2
• What is a logic signal edge, how is it detected and for what purpose?
Section 3.3
• What are Memory Bits (M addresses), and what are they used for?
Section 3.5
• How are the "Set" and "Reset" coils entered and what function do they
have?
Section 3.6
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