Manual

User Guide: FAAST Fire Alarm Aspiration Sensing Technology® Modbus Protocol Schema 1
9
Rev A0
Holding Registers
Note: The Modbus Holding Register addresses are indexed for a Honeywell Building Solutions Enterprise Building Integrator
TM
client.
Other clients may need to subtract 1 from each address in order to access the desired register.
Device Status
The device’s Device Status Structure is READ ONLY and mapped directly to a set of holding registers. The structure in the Firmware
is defined as follows:
Address Size
(16-bit
words)
Parameter Name Type Description
40001-2 2 Universal Time Stamp U32 Read Only - Universal Time Stamp corresponding to the
real-time clock value in UNIX seconds epoch format
3 1 Startup Flags U16 Startup flags
For internal use only.
4 1 System Faults U16 System Faults.
Bit 0: Low Voltage
Bit 1: Low Flow
Bit 2: Configuration
Bit 3: Sensor
Bit 4: External Monitor
Bit 5: Time
Bit 6: Communication
Bit 7: Aspirator
Bit 8: Filter
Bit 9: Isolation
Bit 10: High Flow
Bits 11-15 unused
5 1 Minor Faults U16 Minor Faults.
Bit 0: Low Flow
Bit 1: Configuration
Bit 2: External Monitor Open
Bit 3: External Monitor Short
Bit 4: Time
Bit 5: Filter
Bit 6: High Flow
Bits 7-15 unused
6 1 Urgent Faults U16 Urgent Faults.
Bit 0: Low Flow
Bit 1: Configuration
Bit 2: Communication
Bit 3: Sensor
Bit 4: Aspirator
Bit 5: Filter
Bit 6: High Flow
Bit 7: Low Voltage
Bits 8-15 unused
7 1 Operating Mode U16 Device Operating Mode Enumeration:
CONFIGURATION_MODE 0,
INITIALIZATION_MODE 1,
TEST_MODE 2,
NORMAL_MODE 3,
DISABLE_MODE 4,
RESET_MODE 5,
FACTORY_MODE 6,
SERVICE_MODE 7,
ISOLATE_NEW_MODE 8,
RESET_NETWORK_MODE 9