Bradley Smoker PLC-5 user manual Node privileges override the default privilege class, Channel

12-2Protecting Your Programs

About Passwords and Privileges

The passwords and privileges function supported by enhanced and Ethernet PLC-5 controllers helps you protect your programs by restricting access to controller files and functions.

You can assign a privilege class to a node, channel or file. The privilege class defines the level of access (read or write) or type of function (I/O forcing, memory clearing) the PLC-5 controller allows.

This Privilege	Restricts Access
Node	from a particular node to the controller.
Channel	to a particular channel on the controller.
File	to view or change a file.

	Node privileges override the default privilege class of
IMPORTANT
	the channel.

Privileges Supported by Enhanced and Ethernet PLC-5 Controllers

Node Privileges

Node A

Class 1 privileges

DH+

Node B	Node C
Class 2 privileges	Class 3 privileges

Classes assigned to nodes

Node D

Class 4 privileges

Classes assigned to channels

0	1A	1B	2A	2B
1	1	1	1	1
2	2	2	2	2
3	3	3	3	3
4	4	4	4	4
		Program
		Data

Channel Privileges

File Privileges (program and data)

In , the class privileges assigned to each node govern the access the device has to the controller. For example:

•Node B has Class 2 access to channel 1A, based on the node privilege the controller has assigned it

Publication 1785-UM012D-EN-P - July 2005