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:
If any system fault exists.
If any system maintenance required status
exists.
If any system service in progress status
exists.
The batteries have taken too long to
charge.
System clock needs setting.
the programmed software has become
corrupted.
A fault occurred when using the database.
Power configuration fault
Incorrect power type configured.
A fault in the internal memory has been
detected.
108 05410001A / Revision 6
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