Using the 140 NOE 771 11 Ethernet Module in a Quantum Safety Project
Original instructions
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Overview
Version 4.2 and higher of the 140 NOE 771 11 Ethernet module can be included in one of the following:
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:
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 Control Expert, 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.
Health Bit Assignments
CAUTION
RISK OF DATA LOSS
The default address assignments for the following data blocks overlap:
  • Global Data Health Bit block (%MW1)
  • I/O Scanning Health Bit block (%MW1)
  • I/O Scanning Device Control block (%MD1)
You must edit these address assignments so they do not overlap. If these address assignments overlap, the PLC will overwrite data and the overwritten data will be lost.
Failure to follow these instructions can result in injury or equipment damage.
The 140 NOE 771 11 makes different address assignments–regarding both I/O Scanning and Global Data Health Bit Blocks–for safety and non-safety applications, as follows:
Health Bit Block
Non-Safety Application Addresses
Safety Application Addresses
I/O Scanning
%I
%IW
%M1
%MW1
Global Data
%I
%IW
%MW
%MW1 (only)
1 All I/O Scanning and Global Data Health Bit Block address assignments, for a Quantum safety application, must be made in unrestricted memory address areas.