User manual

Product Description
33002479 06 07/2008 53
Health Bit
Assignments
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:
Risk of Data Loss
The default address assignments for the following data blocks overlap:
z Global Data Health Bit block (%MW1)
z I/O Scanning Health Bit block (%MW1)
z 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.
Health Bit Block Non-Safety Application
Addresses
Safety Application Addresses
I/O Scanning %I
%IW
%M
1
%MW
1
Global Data %I
%IW
%MW
%MW
1
(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.
CAUTION