Flame Safeguard (MM80001/FSG) Manual
6.4 Modbus Addresses
There are 4 types of Modbus addresses:
0x Read/Write Digital outputs – off/on commands
These are binary values and have a 0/1
value indicating an off/on or no/yes value.
1x Read Digital inputs – off/on signals/indications
3x Read Analogue inputs – variable data in
These are multiple integer values and can
have a value of 0 to 65534 and do not contain
decimal points i.e. channel 1 position
Modbus value is 900 which is equivalent to
90.0°.
4x Read/Write Analogue outputs – variable adjustments
0 = Burner is enabled
1 = Burner is disabled
Value changes state of enable/disable button on MM home
screen; changes are kept if MM loses comms with
Modbus device sending commands
0 = No Comms
1 = Comms
Output toggles every 500ms to show the unit it is functioning.
0 = Running interlock (T53) is off
1 = Running interlock (T53) is on
0 = Trim not optioned
1 = Trim optioned
Returns value 0 when option 12 is set for monitoring only.
0 = EGA not trimming
1 = EGA is trimming
Returns value 0 is actual temperature/pressure is below
trim threshold
0 = Cooler is ready
1 = Cooler is not ready
Returns value 0 if EGA is in error state
0 = Temperature OK
1 = Temperature not OK
0 = NO
2
cell not optioned
1 = NO
2
cell optioned
See option 36, valid for Mk7 EGA only
0 = SO
2
cell not optioned
1 = SO
2
cell optioned
See option 36, valid for Mk7 EGA only
0 = EGA is not sampling
1 = EGA is sampling
0 = MM not in hand mode
1 = MM in hand mode
0 = MM not in low flame hold
1 = MM in low flame hold
0 = Burner enabled
1 = Burner disabled
Returns state of enable/disable button on MM home
screen and same value as address 00001
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