15.2.1 MODBUS Registers
Coil Status Registers
The coil status registers provide access to the SF910i relay values. These values are
read using MODBUS function code 1.
This information can be read by any MODBUS master conveniently configured.
Table 15.2: Coil Status Registers (MODBUS)
Register AddressCoil Status
3000Flame status (0 = no flame and 1 = flame)
3001Flame status for second sensor (if dual)
3002FSA is used for Flame Calculation Algorithm on Flame-relay
3003FSB is used for Flame Calculation Algorithm on Flame-relay
3004FSC is used for Flame Calculation Algorithm (single sensor, dual sensor, or Safe-relay
as second Flame-relay)
3005FSD is used for Flame Calculation Algorithm (single sensor, dual sensor, or Safe-relay
as second Flame-relay)
3006Combined Unit Fault Status (0 = no fault and 1 = fault)
3007Scanner Fault (0 = no Scanner-Fault and 1 = Scanner-Fault)
3008Sensor 1 Fault (0 = no fault and 1 = fault)
3009Sensor 2 Fault (0 = no fault and 1 = fault) If dual sensor only
3010The scanner is using the factory default configuration (0= no, normal condition and 1 =
yes, the module must be configured)
3011The flame relay is currently overridden (1 = no and 1 = yes)
3012The scanner is executing an Auto Tune procedure (0 = no and 1 = yes)
3013Flame status for second Function Set (if single and Safe-relay as second Flame-relay (0
= no flame and 1 = flame)
3014The safe relay is closed (meaningful is safe relay used as quality or temperature relay)
3015Spare
8VZZ005286 B 100
15 Serial Interfaces
15.2 MODBUS Protocol
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