Allen-Bradley PLC-5 User Manual page 9

Protecting Your Programs
Programming Considerations
Using BOOTP to Configure Channel 2
for Controllers on Subnets . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-13
Using Domain Name Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-15
Using the Embedded Web Server . . . . . . . . . . . . . . . . . . . . . . . . . . 11-16
Generating User Provided Web Pages . . . . . . . . . . . . . . . . . . . 11-22
Importing User Page Files to the PLC-5 Controller . . . . . . . . 11-26
Using Multihop Messaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-29
Multihop Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-30
Comparing Multihop and Non-Multihop Messages
Over Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-32
Communicating with ControlLogix Devices . . . . . . . . . . . . . . . . . 11-32
TCP/IP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-32
Interpreting Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-33
Interpreting Ethernet Status Data . . . . . . . . . . . . . . . . . . . . . . . . . . 11-34
Monitoring general Ethernet status . . . . . . . . . . . . . . . . . . . . . 11-35
Monitoring Ethernet commands. . . . . . . . . . . . . . . . . . . . . . . . 11-36
Monitoring Ethernet replies . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-36
Ethernet PLC-5 Performance Considerations . . . . . . . . . . . . . . . . 11-37
Performance: Host to Ethernet PLC-5 Controller. . . . . . . . . . 11-37
Performance: Ethernet PLC-5 Controller to Ethernet
PLC-5 Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-38
Chapter 12
Using This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1
About Passwords and Privileges . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-2
Defining Privilege Classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-3
Assigning a Privilege Class to a Channel or Offline File . . . . . . . . . 12-4
Assigning a Privilege Class to a Node . . . . . . . . . . . . . . . . . . . . . . . . 12-4
Assigning Read/Write Privileges to a Program File . . . . . . . . . . . . . 12-5
Assigning Read/Write Privileges to a Data File . . . . . . . . . . . . . . . . 12-5
Chapter 13
Using This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-1
Forcing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-1
Forcing Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-1
Forcing SFC Transitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-2
Extended Forcing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-2
Increased Program Scan Time . . . . . . . . . . . . . . . . . . . . . . . . . . 13-4
I/O Force Privileges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-4
Using Protected Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-5
Using Selectable Timed Interrupts (STIs)
and Controller Input Interrupts (PIIs) . . . . . . . . . . . . . . . . . . . . 13-5
Setting Up and Using Extended Forcing . . . . . . . . . . . . . . . . . . . . . 13-5
Step 1 - Select Which Group of Data You Want to Force . . . . 13-6
Table of Contents
Publication 1785-UM012D-EN-P - July 2005
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