26.1 SERIAL COMMUNICATIONS 512

26.1.1 RS-232 514

26.1.2 ASCII Functions 516

26.2 PARALLEL COMMUNICATIONS 519

26.3 DESIGN CASES 519

26.3.1 PLC Interface To a Robot 519

26.4 SUMMARY 520

26.5 PRACTICE PROBLEMS 520

26.6 ASSIGNMENT PROBLEMS 520

26.1 PRACTICE PROBLEM SOLUTIONS 523