User manual

Product Description
52
33002479 06 07/2008
Using the 140 NOE 771 11 Ethernet Module in a Quantum Safety Project
Overview Version 4.2 and higher of the 140 NOE 771 11 Ethernet module can be included in
one of the following:
z Quantum safety applications
z non-safety applications
A Quantum safety application is controlled by a Quantum safety PLC, consisting
exclusively of safety modules that perform safety functions. A safety module is
denoted by the letter S at the end of its module name.
When used in a Quantum safety application, the 140 NOE 771 11 is a non-
interfering module–it does not negatively affect the execution of the PLC’s safety
functions.
For more information about Quantum safety products, refer to the Quantum Safety
PLC Safety Manual.
Restricted and
Unrestricted
Memory Areas
The memory addresses of a Quantum safety PLC can be configured as one of the
following:
z safety-restricted memory areas
z unrestricted memory areas
Only safety modules can write data to a safety-restricted memory area. For more
information about restricted versus unrestricted memory areas, refer to the topic
Safety PLC Write Protection in the Unity Pro XLS Operating Mode Manual.
The 140 NOE 771 11 Ethernet module–as a non-interfering module–cannot write
data to safety-restricted memory areas. Instead, the 140 NOE 771 11 Ethernet
module can write data only to unrestricted memory areas.
The memory areas of a Quantum safety project are user-configurable. Using Unity
XLS, you can designate address ranges as either safety-restricted or unrestricted.
For instructions on how to configure memory areas, refer to the topic Configuration
of Quantum Processors with Unity Pro XLS in the Unity Pro XLS Operating Mode
Manual.