DL205 User Manual, 4th Edition, Rev. D
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Table of Contents
Initializing System Memory 3–16
Setting the Clock and Calendar 3–16
Setting the CPU Network Address 3–17
Setting Retentive Memory Ranges 3–17
Using a Password 3–18
Setting the Analog Potentiometer Ranges 3–19
CPU Operation 3–21
CPU Operating System 3–21
Program Mode Operation 3–22
Run Mode Operation 3–22
Read Inputs 3–23
Read Inputs from Specialty and Remote I/O 3–23
Service Peripherals and Force I/O 3–23
CPU Bus Communication 3–24
Update Clock, Special Relays and Special Registers 3–24
Solve Application Program 3–25
Solve PID Loop Equations 3–25
Write Outputs 3–25
Write Outputs to Specialty and Remote I/O 3–26
Diagnostics 3–26
I/O Response Time 3–27
Is Timing Important for Your Application? 3–27
Normal Minimum I/O Response 3–27
Normal Maximum I/O Response 3–27
Improving Response Time 3–28
CPU Scan Time Considerations 3–29
Initialization Process 3–30
Reading Inputs 3–30
Reading Inputs from Specialty I/O 3–31
Service Peripherals 3–31
CPU Bus Communication 3–32
Update Clock/Calendar, Special Relays, Special Registers 3–32
Writing Outputs 3–32
Writing Outputs to Specialty I/O 3–33
Diagnostics 3–33
Application Program Execution 3–34
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