Appendix
MultiExact Gas Analyser
A3.10 System Fault Mapping
Read-only access to system fault information will be provided in a block of
100 registers. These can be accessed as discrete inputs using function code 02 or as
input registers using function code 04. Reading them as discrete inputs provides a
simple bit result for each, 0 for off and 1 for on. Reading them as input registers
provides information on their NAMUR status, as follows:
•
0 = off
•
1 = fault
•
2 = maintenance required
•
3 = service in progress
The fault, maintenance required, and service in progress faults provide a summary of
the other states and can only be off or on. The registers are assigned as follows:
Register
Name
Comments
1001
Fault
If any system fault exists.
1002
Maintenance required
If any system maintenance required status
exists.
1003
Service in progress
If any system service in progress status
exists.
1004
Charging time out
The batteries have taken too long to
charge.
1005
Date/Time invalid
System clock needs setting.
1006
Code fault
the programmed software has become
corrupted.
1007
Database fault
A fault occurred when using the database.
1011
Power configuration fault
Incorrect power type configured.
1012
Static RAM fault
A fault in the internal memory has been
detected.
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05410001A / Revision 6
