MultiExact Gas Analyser
Appendix
A3.14 System control
System control will be provided using a block of coils that can be written to using
function code 05. Reading the same coils with function code 01 provides status
information.
Coil
Name
Comments
1
Floating point order Changes the order of the Modbus registers when
dealing with 32-bit floating point numbers.
0 = big-endian, e.g. 40001 = high word,
40002 = low word (default).
1 = little-endian, e.g. 40001 = low word,
40002 = high word.
2
User interface busy 0 = idle (on main screen),
1 = busy, user interface is in use.
Write 1 to stop the user interface (keys) being used.
3
Pump/solenoid
control
0 = off, 1 = on.
A3.15 Transducer control
Transducer control will be provided using a block of coils that can be written to using
function code 05. Reading the same coils with function code 01 provides status
information. A block of 100 coils is reserved for each transducer as follows:
Coil
Name
Comments
101 – 200
Transducer 1
201 – 300
Transducer 2
05410001A / Revision 6
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