System Sensor FAAST Modbus - Manual (Page 8)

User Guide: FAAST Fire Alarm Aspiration Sensing Technology® Modbus Protocol Schema 1
8
Modbus Configuration
The device’s Modbus Configuration Structure is READ/WRITE 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
40326 1 ∆ Administrator Password U16 Password to enable Commands through the Command
holding register.
Enter as an Unsigned Decimal number.
327 1 ∆ Sensor Command Register U16 Command Register:
0xAA11 – Save Configuration
0xEE22 – Save Time
328 1 ∆ Event Log Index U16 Starting Index of Event Log Entry which to read
329 1 ∆ Trend Log Index U16 Starting Index of Trend Log to read
330 1 ∆ Message Log Index U16 Starting Index of Message Log to read
Table 1. Modbus Specific configuration Holding Registers
∆ Information - Registers 326-330 can be configured by using Function code 6(single write) or Function 16 (multiple write).
Input Registers
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.
Address Size
(16-bit
words) Parameter Name Type Description
30001 1 Schema U16 Modbus Firmware Schema for client to determine version of
register mapping.
Table 2. Modbus Input Registers