7.1 OPERATION SEQUENCE 126

7.1.1 The Input and Output Scans 127

7.1.2 The Logic Scan 127

7.2 PLC STATUS 128

7.3 MEMORY TYPES 129

7.4 SOFTWARE BASED PLCS 129

7.5 SUMMARY 130

7.6 PRACTICE PROBLEMS 130

7.7 ASSIGNMENT PROBLEMS 130

7.1 PRACTICE PROBLEM SOLUTIONS 131