Chapter 2
OSA Remote Operation
12
Bedrock Secure OSA Remote User Manual - BRDOC020_001
10/11/18
Figure 2-1 Secure OPC UA Parameters in the Bedrock IDE
Secure Boot Software
This software component manages power on startup. It is responsible for
initializing the hardware and starting the operating system.
MRAM and Data
Persistence
The Bedrock Secure OSA Remote has 8 kB of magnetoresistive RAM (MRAM)
available. This allows control programs to have access to persistent or retained
variables. These two types of variables are declared in Program Organization
Units (POUs) in the Bedrock IDE and provide data persistence as follows:
•
Persistent
variables are restored after cold resets, warm resets, or
program downloads. They are cleared using the Reset Origin function
in the Bedrock IDE.
•
Retain
variables are restored after a warm reset. They are cleared using
the Reset Origin function in the Bedrock IDE.
Refer to the Bedrock IDE online help for information on how to implement
persistent and retained variables in your application.
Note that an application program in the Bedrock IDE must have its task
interval set to 5 ms or greater to ensure that the MRAM is correctly updated
during each control cycle.
IP Stack
Bedrock Secure OSA Remotes use a dual-mode IPv4/IPv6 stack.
Table 2-1 Parameters for Configuration of Secure OPC UA
Parameter Name
Description
Require Secure OPC UA Communication
Set to TRUE to require Secure OPC UA. Set to FALSE to make Secure
OPC UA optional, i.e. Secure OPC UA is allowed but not required.
Send OPC UA Certificate Chain
If set to TRUE, the entire certificate chain is sent from the OSA Remote to
the client. If set to FALSE, just the certificate itself is sent..